h1

Finally – the Bresser Messier AR102S Comet Edition at the Salton Sea

February 26, 2017

ar102s-at-dawn

Sometimes life is cruel.

(Did I say cruel? I meant ridiculously First World cushy, where a grown man can afford nice toys and has the time to play with them and blog about it. But within the context of this grown man’s play-time blog, sometimes life is cruel.)

To wit: my Bresser Messier AR102S Comet Edition (still sans snappy nickname) arrived on Sunday, January 29, just a few hours late for the new moon observing run at the Salton Sea that Terry Nakazono and I went on the night before. Since then it’s been mostly cloudy here, with poor transparency on the nights it hasn’t been totally socked in, so I’ve been misusing the scope on bright stuff like the moon and Jupiter. And waiting not-so-patiently for a chance to get out to dark skies and do some wide-field, low-power scanning.

I actually did get about 45 minutes of semi-dark time with the scope a week ago. I was on dawn patrol up in the foothills and I spent some time in the summer constellations before the sun came up. The views were bright and contrasty, but all it did was whet my appetite.

Friday night I finally got the scope out under decent skies, for a decent amount of time. I decided pretty late to go to the Salton Sea – originally we had other plans, but Vicki and London were wiped out from a long week, and the forecast said that Friday was the last clear night for a while, all over SoCal. I didn’t leave Claremont until almost 7:00 PM, and with set up time after I arrived at Mecca Beach, I didn’t start observing until 10:00.

Gear

I was rolling pretty light. I wanted to test the Bresser reflactor/bino set as a package, so I used the AR102S on the came-with mount and tripod. I essentially always have binos out while I’m observing, so I used the 7x50s that came with the scope. That was a novel experience – I usually roll with 10x50s or 15x70s. This was my first time using 7x binos for serious deep-sky observations.

The only way I broke with the Bresser package was with eyepieces. I did use the included 20mm 70-degree a few times early in the evening, and I briefly tested the 10mm 70-degree that just came in, but my most-used set for most of the evening consisted of the 28mm Edmund RKE, both natively (16.4x) and with a 2x Barlow (33x), and the 8.8mm ES82 (52x and 104x).

28mm-rke-in-ar102s

A word about the 28mm RKE. It is simply the most comfortable eyepiece I’ve ever used. There are several factors that play into that. One is the long eye relief. Another is the magical floating stars effect, which is real, and impressive. Finally, there’s the wide exit pupil it gives, which in the AR102S is 6.2mm. That’s probably wider than my pupils go these days (same is true of the 7mm exit pupil of the 7×50 binos). Using binos or eyepieces with exit pupils wider than your own will go is usually not recommended. The extra light falls on the muscles of your iris, not on your retina, so your pupil becomes an aperture mask, stopping down the system to a smaller working aperture. You could get just as much light delivered to your brain using a smaller instrument or eyepiece. But there is one positive effect of using a “too-wide” exit pupil: you can move your eye around a bit within the light beam, without any falloff in illumination. So “too-wide” exit pupils are very bright – maximally bright – and very comfortable. And if a bit of light is wasted, oh well, it’s not like the cops are going to come for you.

One nice effect of swapping the 28mm RKE for the 20mm 70-degree is that they have close to the same true field of view of 2.9-3.0 degrees, but the RKE gives a much sharper image with fewer aberrations. Unsurprisingly, since it’s bending light from the same true field into a much smaller apparent field. Normally, a 45-degree AFOV would feel downright claustrophobic to me these days, but for some reason the 28mm RKE doesn’t bother me. I think it’s the magical floating stars effect – most narrow-fields (okay, anything south of 50 degrees) feels tight, like looking through a soda straw, because so much my field of view is taken up by the inside of the eyepiece barrel. But with the 28mm RKE, there is no visible eyepiece barrel, so although the AFOV isn’t actually that big, it feels much more expansive.

I did have one minor gear screw-up: I forgot my laser. I haven’t installed a finder on the AR102S. Same with the C80ED, except for one or two nights early on. When I really need help I lay a laser finder along a straight edge and use it to point to things in the sky. On the C80ED, there are a couple of buckles on the tube clamp that together form a de facto trough like the one I built for the SkyScanner 100. On the AR102S, the finder bracket serves the same purpose. But I forgot my laser. So I did what I usually do, just dead-reckoned it. I’ve gotten to the point where I usually don’t even have to sight down the tube, I can just sort of look up and aim the scope and get the target within a 3-degree circle. The AR102S will go wider than 3 degrees – a 32mm Plossl or 24mm ES68 will give 3.6 degrees, and my 32mm Titan 2″ will go to 4.88 degrees. But none of those eyepieces do their thing with the same panache as the 28mm RKE – at least in this scope. I did get out the 32mm Plossl just in case I needed a wider ‘finder’ eyepiece, but it never made it into the focuser.

Goals

I had a program in mind. Long-time readers will know that I’m a big fan of Jay Reynolds Freeman’s astronomy essays, especially “Refractor Red Meets the Herschel 400”. More relevant to this post is “Messier Surveys”, in which Freeman relates his habit of running through all the Messier objects with every instrument he gets his hands on, from 7×50 binoculars to a 14-inch SCT. Despite my Messier Marathon attempts, I’ve never kept track of which Messiers I’ve seen with which instruments. I’m certain I’ve seen them all with the XT10, and I’ve seen almost all of them with my 15x70s, but beyond that, I have no idea. So I decided that the best way to properly test the Bresser would be to start a Messier survey with it.

To be clear, I had no intention of attempting an off-season or mini Messier Marathon. I decided to just go until I got tired. I also was not a purist – I looked at plenty of non-Messiers along the way, including some I had never seen and wasn’t planning to observe when I started.

And in fact, I started with some non-Messiers.

Perseus

When I started observing at 10:00, plenty of good stuff was getting perilously low in the west. The western reaches of Cassiopeia were already down in the Palm Springs/Indio light dome. I started with the Double Cluster and Stock 2 – my first time looking at them with the AR102S. They were spectacular as always. Then I swept up through the Alpha Persei Association and followed the eastern ‘arm’ up to NGC 1528. The cluster was fully resolved at 33x, but I thought it was prettier at 16.4x, when the dimmer stars trembled just at the threshold of resolution. I also checked in on NGC 1545, which is a much less impressive cluster and a much tougher catch since it is dominated by a bright foreground star. But my favorite observation in this area was another OC, NGC 1513. I tried this one at a variety of magnifications and it always ‘popped’ a little more in averted vision, as previously unresolved stars swam into visibility. Not one of the sky’s stunning showpiece objects, but delicately beautiful if you have the time to tease out its secrets (and the skies – it’s not bright).

I hit M34 on my way out, and of course I stopped at the Pleiades, which were very nicely framed at 16.4x.

Orion and Vicinity

After all of that, I realized that I had to get a move on if I wanted to catch M79, the glob in Lepus, before it set. I hopped over to snag it, and visited Hind’s Crimson Star while I was in the neighborhood. It was a tiny red spark in the 28mm RKE.

The whole sword of Orion fits into the field of view of the RKE. The Trapezium was nicely broken out into four stars at 33x with the Barlow. I had a quick look at Sigma Orionis and scanned the Belt and the big OB association just off Orion’s western hip. M78 was delightful. Even at 16.4x, the two foreground stars were visible and distinct from each other and from the background glow, and the western edge of the nebula showed a more abrupt cut-off, which lent the whole object the feel of a comet.

Binocular Tours

Up to this point I had been using the 7x50s to trace my star hops in advance, but now I really started to run ahead. One thing about writing my deep-sky tour articles for Sky & Tel – I usually remember all the stops and I can run through them quickly anytime I’m out. In this case, I started at Sirius and followed the path of my December 2015 article down through Canis Major, across Puppis – with a side trip down to Vela that was not in the article – and into Hydra (for M48). Then I picked up where my tour from this March started, running northwest through Monoceros and northern Orion before ending in Gemini. Running through both tours took about 10 minutes, and I saw a lot and missed a lot more. Seriously, that stretch of the winter Milky Way is just ridiculous. You can swing your optics over it again and again and not pick out all there is to see.

Then I had a long break to rehydrate, eat a snack, and get into my cool-weather getup. I’ll have to write a whole post about that sometime.

ar102s-set-up-for-observing

After the break I went back through almost all of that with the telescope, in part just to see it all with more than 50mm of aperture. I noticed some Herschel 400 objects in Puppis that I had never observed, namely the open clusters NGC 2479 and 2509. Both were dim swarms of faint stars that were still not fully resolved at 52x, but very pretty. I had not noticed them in the binos, but after catching them in the scope I was able to see them when I went back with the 7x50s. I was comparing the two clusters in the binos when a meteor flashed through my field of view, which is always a cool sight. I spent about half an hour trying to catch the planetary nebula NGC 2440, and even hauled out Interstellarum to help me get on target, but I never got a definite sighting. I’m going to have to study that one and come back another time.  I did catch NGC 2438, the planetary nebula that is superimposed on M46 but only about half as far off as the cluster. It was obvious at 52x but I couldn’t separate it from the glow of the cluster at 16.4x. Needless to say, it didn’t show in the binos.

Roaming

By the time I was finished retracing my winter Milky Way tours, the Auriga Messiers were getting low in the west, so I hopped over to check them out. After that I hit M44 and M67 in Cancer. M44 was just perfect at 16.4x – everything nicely resolved, but still compact enough to look like a coherent object. The stars in that cluster always seem to fall into geometric patterns to me, as if they were laid out using a grid system that got erased the morning after creation. I can’t think of anything else in the sky that gives me the same impression.

I also popped up north, past Iota Cancri and over the border into Lynx, to check on NGC 2683, a surprisingly bright and easy Herschel 400 galaxy that I had previously only observed with binoculars. (Want to know more about this galaxy and its neighbors? See the April 2017 Sky & Tel!) Since I’d seen it with smaller-aperture binos under worse skies, naturally it was an easy catch for the AR102S.

After that I turned south, to Omega Centauri. Although I haven’t written about it yet, when Terry and I were at the Salton Sea last month, I spent a long time looking at the monster ‘glob’ – actually the exposed core of a dwarf galaxy that was cannibalized long ago by the Milky Way. It’s a favorite spring target of mine when I have a good southern horizon. From Mecca Beach there is a definite light dome from El Centro and usually some near-horizon haze in the southwest – directly over the water. But Omega Centauri culminates between that particular Scylla and Charybdis. Last month I spent nearly an hour checking it out, using naked eyes, binoculars, and several levels of magnification with the C80ED. I could just get the outermost stars to resolve at 120x, albeit in imperfect seeing. This time was worse – about the same lousy seeing, and slightly worse transparency. I didn’t get any actual resolution, but I could make out pronounced differences in brightness across the face of the cluster. I also had a look at NGC 1528/Centaurus A, the famous radio galaxy. I think it should be naked-eye visible under optimum conditions, but my conditions were not optimum. It was obvious in the binos and showed some detail in the scope.

Then it was on to Corvus to check in on M104 and M68. I also observed the planetary nebula NGC 4361, I think for the first time. It’s bright but small, and it turned out that I could see it at 16.4x, I just didn’t recognize it – I had to go up to 52x to confirm that it was nonstellar. I also visited M83 while I was in that neck of the woods. What a wonderful galaxy, so big, bright, and obviously elongated even at low magnification.

By now it was almost 3:00 AM and I was getting pooped. I finished in Lyra, with Epsilon Lyrae and the Ring Nebula, M57. I couldn’t split the Double Double. That might have been the scope, but it might have been the skies – by this point there was a steady breeze blowing right in my face when I looked east. I have had other nights where the seeing was so bad that Epsilon Lyrae would not split. I did notice some CA around those stars at high power, which probably didn’t help.

I decided to finish with M57, which was fitting since it was a chance observation of that nebula with the TravelScope 70 a few years ago that got me hooked on refractors. I wanted to recreate the feel of that surprising low-power observation so I left in the 28mm RKE. The whole southern end of the parallelogram fit very nicely into the 3-degree field, with M57 showing as a pale little dot. Then I realized that I had stopped the scope down to 60mm while I was playing with the double star and had forgotten to take off the aperture mask. So I got to do one of my favorite tricks – reach up and pull of the mask while I’m observing, and watch the sky get brighter in a hurry, as if all the lights out there suddenly turned on. The nebula had been obvious at 60mm – at full aperture it was so bright it almost looked stellar.

ar102s-at-mecca-beach

Tally

I ended the night having observed several double stars and 46 unique DSOs with the telescope, of which only 22 were Messier objects. Three were Herschel 400s which I believe I observed for the first time – those were the open clusters NGC 2479 and 2509 in Puppis, and the planetary nebula NGC 4361 in Corvus.

I’ll have a more complete review along soon, but the Bresser Messier AR102S lived up to its middle name – it is a superb Messier-catcher. Every Messier I attempted was not just visible but easy at 16.4x. Will be interesting to try it on some of the smaller, tougher objects like M76. I think this will be my Marathon scope this year.

Don’t take this as a full-spectrum endorsement. When I do post a full review of the scope, I’ll have both good and bad to report. It’s not a good all-rounder, not a good first or only scope. But what it’s built to do, it does quite well.

The biggest surprise for me was how much I could see with the 7×50 bins. I didn’t catch everything, but of the 46 DSOs I observed telescopically, 34 were also visible in the binos, and some of the rest I simply forgot to check (the galaxy NGC 2683 comes to mind). There were more DSOs that I saw in the binos but didn’t take the time to log, including shedloads of clusters in Monoceros. I don’t know if I will be able to complete a Messier survey with the 7x50s – I reckon some of the smaller planetary nebulae will prove my undoing – but I’m at least going to make the attempt.

h1

Kickstarter – the Great Lick Refractor

February 25, 2017

I have been very fortunate in getting to visit the Lick Observatory three times, and to look through the Great Lick Refractor (36″/914mm aperture, f/19) on two different occasions. On the second visit I even got a quick afocal snap of Saturn through this wonderful, 129-year-old instrument. Those stories and accompanying photos are on Cloudy Nights, here.

I bring this up because there’s a Kickstarter going on right now to sponsor a couple of experienced astrophotographers to use the Great Lick Refractor for one night (or maybe two, if they enough funding), and backers get copies of their pictures. The project will be funded – they’re already well over the target goal of $6500 and closing in on the $9000 they’ll need for a second night – so there’s no real risk here. I pounced as soon as I heard about it. If you’re interested, click on one of the links above and check it out.

This project will be funded on Monday, March 20, 2017, at 7:17 PM PDT.

h1

From sub-aperture mask to replacement dust cap

February 23, 2017

aperture-mask-2-4-length-comparison

Here’s something dumb. The Bresser AR102S Comet Edition is optimized for two things: widefield, low-power scanning, and portability. At 20″ for the OTA it’s just within the bounds of airline carry-on-ability, but you can unscrew the dewshield and shave off another 4″, at which point the options for storage and transport expand wildly.

BUT the stock dust cap for the objective is dome-shaped, for no good or obvious reason, which means it sticks out about a full centimeter longer than necessary. When you’re thinking about flying with a scope, that is one centimeter more stupidity than you should have to put up with.

There’s another problem with the stock dust cap: when the scope gets cold, it gets loose and falls out easily. Nothing unique to this scope about that – I’ve had to shim the majority of my scopes’ dust caps for the same problem, including the C80ED and XT10. One cheap package of sticky-back green felt has kept me going since 2010. I think I’ve used almost a third of it.

Now, I already have a nice 60mm sub-aperture mask for this scope (construction details here). If I could plug the central hole securely, I’d have a replacement dust cap that would be shorter, would get tighter rather than looser if it shrunk in the cold, and would serve double-duty as both a dust cap and a sub-aperture mask. The problem was finding a plug the right size, with a good lip on it to keep dust out, that would grab the edges of the mask hole securely.

aperture-mask-2-1-tootsie-roll-can

And it’s the dollar store to the rescue again, with this container of Tootsie Rolls that is intended to double as a coin bank. The hard plastic lid snaps down into the cardboard tube very securely, and the plug bit is just a shade over 60mm in diameter.

aperture-mask-2-2-external

I used the Dremel and some sandpaper to enlarge the hole in the sub-aperture mask ever so slightly, and voila. There’s a small lip that runs around the top edge, and even a little recess in which to hook a finger and pull out the plug.

aperture-mask-2-3-internal

Here you can see the ridges on the plug. By sanding in short increments, I was able to fine-tune the hole diameter until the plug snapped in very securely, without stressing either piece. I need to put some tape or a little epoxy or something over the perforated slot, which is intended to be punched out so the candy container can become a coin bank. Or cut out the center and replace it with another, smaller plug, so I’d have a dust cap and two aperture masks in one package…

aperture-mask-2-5-dust-cap-replacement

Boom. Now the scope is a centimeter shorter for travel, and I don’t have to keep the sub-aperture mask in my eyepiece case.

What I really want is for someone with even rudimentary 3D modeling skills to create a series of nested aperture masks, like Russian dolls, in 10 or 20mm increments, which could be 3D printed on demand in whatever combinations people needed. Most of them could be standard sizes, with only the outermost adapter for each telescope model needing to be custom. Then you could order the adapter for your scope and whatever set of nested masks you wanted, or maybe all of them to simplify, so your 100mm scope could also be an 80mm, a 60mm, a 40mm, and even a 20mm (the “Galileo model”) if you liked, just by taking out the relevant bits from the dust cap. Sure, it would be gross overkill for most people, but for those of us who like playing “what if” (“what if my C80ED was a C40ED?”) it would be a godsend. And with 3D printing no-one would be stuck with a bunch of useless stock when the idea inevitably bombed.

Anyway, if someone would to that, it would save me the trouble of building my own “Mask-ryoshka” dust cap out of junk from the dollar store. But if I’m being totally honest, avoiding building my own stuff out of junk from the dollar store was never the point of the exercise, was it?*

* With apologies to Adam Savage.
h1

Get $5 off your first purchase from OpticalInstruments.com

February 21, 2017

Hey, I was temporarily without a 10mm eyepiece (long story) and I have been sufficiently happy with the Bresser 20mm 70-degree that came with my AR102S Comet Edition that I plunked down thirty bucks for the 10mm version (sale price, down from $50). It was only my second-ever purchase from OpticalInstruments.com (after the Bresser Spektar spotting scope a couple of years ago), but they rewarded my ‘ongoing support’ with this deal. You can use this link and unique code:

https://opticalinstruments-com.myshopify.com/?redeem=58abdb56bb070f0018560f59

to get $5 off your first purchase, and if you do, I’ll get a $5 kickback. As far as I know, there is no limit to how often this can be used by people making their first purchase there. So if you’ve been tempted by something at that store, here’s your chance to save a little dough. Happy shopping!

h1

The 28mm RKE in action

February 20, 2017

Still cloudy here, but we got a gap earlier this evening, a persistent sucker hole right over Orion, and I got a whole 10 minutes of observing in. I was using the Bresser AR102S Comet Edition and for eyepieces the 20mm 70-degree that came with it, and my new 28mm RKE from Edmund.

Both eyepieces will just fit in the belt of Orion, with Alnitak and Mintaka in the last 5% or so of the field on either side. So the belt turns out to be a good test of edge characteristics. The 28mm RKE is way sharper at the edges, by the way. You might think that its 45-degree apparent field of view would feel positively claustrophobic after the 70-degree field of the Bresser eyepiece.

But it doesn’t, because of the magical floating stars effect. It’s real! It’s one of the most arresting things I have experienced in almost a decade of observing. As your eye gets closer to the eyepiece, you begin to be able to see the image. As you move in until you can see the entire field, the point where the eyepiece barrel disappears from view coincides exactly with the point where you are far enough to see the field stop of the eyepiece. If you hold up right there, you see the image created by the eyepiece floating in space, with a thin ring of unresolved darkness around it, which if you back out a bit will be the eyepiece barrel, and if you move in a bit will be the eyepiece field stop. In either case, the eye relief is great enough that you can still see the rest of the scope in your peripheral vision, past the thin ring of darkness at the edge of the field.

I have never, ever seen anything like this. It is exactly as cool and immersive as the legends have it. I can imagine building a whole observing kit consisting of this one eyepiece and a series of Barlows of various magnifications.

Anyway, if you have been on the fence about this eyepiece like I was, just get it. It’s amazing.

h1

Me and the ‘Stig

February 19, 2017

This story started a few nights ago. I had been monkeying around with the AR102S, both at its native aperture and stopped down, and I decided to see how it compared to the C80ED. In particular, I wanted to compare the rich-field views of both scopes (such as they are here – I was observing from the driveway after all), so I was looking at the belt and sword of Orion. The results of that comparo were not very surprising – with it’s wider aperture and shorter focal length, the AR102S goes significantly wider and brighter, but the longer focal ratio and low-dispersion glass of the C80ED produce a better-corrected image.

What was not only surprising, but actively alarming, was that at low power I was getting ugly star images in the C80ED. Even in the center of the field, stars were not focusing down to nice little round points, but to crosses and shapes like flying geese. I wondered if my diagonal might have gotten banged up, so I swapped diagonals. The problem persisted. The scope will not reach focus without a diagonal or extension tube, and I don’t have an extension tube, so I couldn’t try straight-through viewing. Still, it was exceptionally unlikely that both of my good diagonals got horked in the same way.

I didn’t know what to make of that. I figured maybe the scope had gotten out of collimation somehow, and I was pondering whether to mess with it. It’s always been optically excellent and mechanically solid (overbuilt, in fact), and I was loathe to take it apart (as opposed to the TravelScope 70 and SkyScanner 100, both of which were crying out for disassembly).

Then a few days later I ran across this thread on CN, in which a guy was having the same problem I had. It sounded like it was more likely astigmatism (aka the Stig) in the eyes than in the telescope. Apparently it’s worse at low powers where the exit pupil is large, which makes sense – astigmatism is caused by having corneas that are out of round (football-shaped rather than basket-ball shaped), but as the exit pupils get smaller, the less of the cornea is involved in vision, and the more likely it is that the ‘active’ portion will approximate a radially even curvature.

astigmatism-of-the-eye

One commenter recommended making a little diaphragm between thumb and forefinger to stop down the exit pupil. I tried that, but it was awfully difficult to hold my finger and my eye all steady and in alignment. Then I had the idea of using a collimation cap from one of my reflectors. That stopped down the exit pupil to a 1mm circle, which made the image d-i-m, but the star images cleaned right up. Then I took away the collimation cap and tried the view with and without glasses, and the glasses also cleaned up the star images.

It wasn’t the scope, it was me. I have astigmatism, and it’s bad enough that stars look ugly at low power unless I wear glasses.

On one hand, that’s a big relief, because the C80ED scope has always been a rock-solid performer. Along with the Apex 127, it’s my reference standard for good optics. I was feeling a bit queasy at the thought that it might have gotten out of whack.

On the other hand, I now need to prioritize eye relief in my eyepiece collection. I have a bunch that are too tight to show the whole field when I’m wearing glasses. So I have some decisions to make.

That was the first major discovery of the night.

The second was that the AR102S can take 2″ eyepieces with the most minor tinkering. The 2″-to-1.25″ adapter at the top of the AR102S focuser drawtube screws right off. I had been worried that it might be permanently affixed, but when I tried turning it, it spun with remarkable ease. Once I had it off, I dropped in the 32mm Astro-Tech Titan, which is my only 2″ eyepiece, and the views were pretty darned good. Way wider than with any of my 1.25″ eyepieces, and pretty clean as well, although I need to a little more head-to-head testing on that score. Possibly the star images looked good because they were so small at only 14x.

bresser-ar102s-with-2-inch-ep

In any case, the 32mm Titan gives a significant boost in true field, from 3.6 degrees in the 32mm Plossl and 24mm ES68, to a whopping 4.88 degrees.

I don’t think there would be any advantage in going wider, at least in the AR102S. Astronomics seems to be out of Titans, but the equivalent 70-degree EPs are available through Bresser and Agena. The next step up would be a 35mm or 38mm, giving 13x and 12x, but those would push the exit pupil to 7.7mm and 8.5mm, and that’s just wasted light. At least in the AR102S – in the C80ED, longer 70-degree eyepieces would yield the following:

Focal length / magnification / exit pupil / true field

  • 35mm / 17.1x / 4.7mm / 4.1 degrees
  • 38mm / 15.8x / 5.1mm / 4.4 degrees

Either of those would be a good step up from the 3.7-degree max field that the 32mm Titan gives in the C80ED, without pushing the exit pupil uselessly wide.

Anyway, I’m just noodling now. The big news is that the C80ED is fine, I need to prioritize long eye relief in future EP purchases (and maybe thin the herd a bit?) so I can observe with glasses on, and the AR102S can take 2″ EPs after all.

h1

Unboxing the Edmund 28mm RKE

February 17, 2017

rke-unboxing-1

Look what came in the mail today.

rke-unboxing-2

Something small, in a gold box.

rke-unboxing-3

An eyepiece wrapped in paper, and a rubber eyeguard.

rke-unboxing-4

And here they are.

rke-unboxing-5

That is a big honkin’ eye lens. And that’s why I got this eyepiece. The 28mm RKE from Edmund is legendary for its “floating stars” effect where the big eye lens, the sharply raked barrel, and the long eye relief combine to create the impression that the eyepiece has disappeared and the image is simply floating in space. I’ve never experienced this, because I’ve never gotten to look through one of these before. But the reputation of this eyepiece, illustrated by several glowing threads on Cloudy Nights (like the ones that follow), was enough to convince me to take the plunge:

rke-unboxing-6

It didn’t come with a case, so I made my own out of an old prescription pill bottle. A little bubble wrap stuffed in the bottom and taped inside the lid, and I’ve got a nice padded case for free.

new-eyepiece-curse

And I need that case, because the new gear curse is in full effect. How does this eyepiece work in practice? No idea yet – with any luck, I might find out next Wednesday, when the clouds are finally supposed to part. I’ll keep you posted.