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wasteland

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Everything posted by wasteland

  1. My 20mm SWA (actually a Maxvision rebrand) is a favourite for me! It has all the sharpness of the 24mm SWA and none of its field curvature (in a F/6 newt)! And the best feature of them all is that I got it second-hand for just 40£!
  2. Alan, since you mentioned it, I'd love to know what are the intrinsic differences between the XW and the Panoptic design. I seem to understand that the XW, as well as the Delos, are regarded as superior to the Pans/ES68 where their ranges overlap, with better transmission contrast and correction. Which is again to be expected, as the Panoptic line is almost as old as I am while the Delos were introduced just 5 years ago. My other question is, provided that the XW/Delos design is superior, does this superiority carry itself all the way up to the 40mm FL?
  3. I am definitely not the seller! if I had pockets deep enough to afford a legendary eyepiece such as the XW40 I would be extremely reluctant to part with it. I think I would probably take on some Gollum-esque behaviour towards it, actually.
  4. He claims it's in pristine conditions:
  5. Hey people! I am not sure if this is the proper place to discuss this or even if it is allowed by the rules, so if the mods were to deem this thread inappropriate, I apologise for the code infraction. Anyway, I saw a few interesting used eyepieces deal on the main Italian retail site for used astronomy and photography gear, astrosell.it . There I found a guy who's selling a bunch of premium eyepieces to interesting prices: XW 10 -> 250 € XW 40 -> 400 € Along with a few other TV products at not so competitive prices Since I can't afford any of those eyepieces even at those sharply (?) reduced prices, I though someone here might be interested in them. I think the the XW40 might especially be of interest, as I have seen many times the very same eyepiece pop up on the used marked for prices as high as 600€! Anyway, I am obviously not the guy who's selling this eyepieces, I don't know him and I have not even contacted him, so I can't obviously vouch for him or know if he is alright with shipping the eyepieces he's selling. So this thread is basically just as heads-up, as the title suggests. I'll leave any further reasoning to you. Here's the link to his selling page: https://www.astrosell.it/profilo_utente.php?Id=6709
  6. Let us know how you like your new eyepiece, once you get the chance to try it out in your 16'' beast! If coma doesn't bother you, dovrebbe essere una figata! One day, when I'll be more stable money-wise, I'll probably go for a 100° eyepieces myself, the lure is just too strong to resist!
  7. What a great picture this is! As Olly said, the amber color west to M20 and M8 is a very rare feature in those pictures! Love M22 as well, what a glorious lump of stars. My favourite globular in all the sky!
  8. I get that neither of the tails were visible through the bins, right? Unfortunately I will miss this one comet. The forecast is negative for the next 10 days, and after that I won't have access to my stargazing equipment. Pity.
  9. Did you see comet Lovejoy last year? If so, how does the view compare?
  10. I saw the advert when it was still live, and I decided against it. I already have an 11mm ES82, and I feared the Delos would have been too much of a duplicate to be worth spending 200€. Thus I missed my first real chance of owning a TeleVue eyepiece. Did I do wrong?
  11. Consider that although two eyepieces may yield the same magnification the effective view can be vastly different according to their apparent field of view (AFOV)! For instance, the 24mm 82° will show you a portion of the sky that is 2.29 times larger than a standard 52° 25mm plossl. (I got the figure by squaring the ratio of the AFOVs times the inverse ratio of the focal lenghts, which is to say, squaring the ratio of the true field of view's). Of course in the end it all comes down to one's tastes. I sadly (?) fell very quickly to the widefield sickness and will probably never be completely content anymore with watching the heavens through a mere 52° window, but many people here seem to be immune to the allure of the wide field, and will actually prefer simple and narrower (yet arguably more contrast-y) designs, such as the orthoscopics. It's a complicated world, really, and the only certainty is that your walled is going to be much lighter than it was when you first start wondering about upgrading your eyepieces in the first place.
  12. I've recently purchased a 24mm 82° Maxvision through Bresser.com, where the eyepieces is currently on sale at just 100€+shipping fees (which amount to around 10 extra euros for Italy, I'm sure that the price for a UK shipping would be comparable). I haven't had time so far for a proper in-depth test, but from what I have seen it's sharp on axis and has only minor aberrations near the edge of the field (to my sensibility, at least). Considering it's BY FAR the cheapest 82° 'longish' FL you'll find on the market, I'd say it's definitely a bargain.
  13. I have a Maxvision 20, and since the eyepiece series most likely has a scaled design I can can guarantee that it performs splendidly in my F/6 reflector. Crisp until the edges of the field!
  14. Ok, so I have now resolved that somehow the primary mirror has traveled about 0.25-0.5cm towards the front of the tube, as I needed to pull the eyepiece around 1cm out of the focuser for the image to snap into focus. How do you think I might reverse the mirror walk?
  15. As the title suggests, I am in dire need of help with the collimation of my Orion 8'' dobsonian. I suspect that the problem might be a displacement of the primary mirror along the axis of the telescope, but I'd like to hear a more competent diagnosis from someone far more experienced than I am. So, here's what happened: 1. For a number of months the telescope worked alright, until last month I caught a certain softness in the way the stars were displayed at medium to high power (let's say from 120x upwards, with hints un un-pointlikeness visible with some effort already at 60x). 2. Suspecting a decollimation of the telescope, I proceeded to adjust the primary slightly. I noticed how one of the three screws was somewhat hard, and applied some force to it with my hands, without succeeding in unlocking it. I eventually made it during step 7. 3. Noticing how the reflection of the primary was a tad more than slightly off the center of the shadow of the secondary mirror, I tried to adjust the secondary. 4. Moved by an unhealthy dose of healthy curiosity, I removed the focuser and then put it back where it was. Twice. 5. I reached a satisfactory collimation image through the hole-y collimation eyepiece, then went to have a routine look at the moon. I found myself unable to put it to focus in any of my ES eyepieces. 6. After a month of forced inactivity I tried to collimate again from scratch today, with no visible improvement. Interestingly enough, I found I was able to focus on a far away chimney using my Celestron 15mm plossl, which is not parfocal with any of the other eyepieces I own. 7. I tried to adjust the mirrors again, but nothing changed. In a staggering inverse variation of the eyepiece curse, the sky is completely clear and the transparency looks good today. It would be a great night for observing the winter sky through a telescope for the first time (yes, I very much a newbie, if the rest of the post wasn't convincing enough). Can any of you help me save the daynight? Thank you all in advance! Marco (also posted on CN.com)
  16. Bresser, of course! Anunoying atocorrector magic, clearly!
  17. Unfortunately the only powermate within my wallet's reach was the 1.25'' 2.5x, so it will be of no use with those 2'' oculars. I've got the middle range quite covered, though, between the 20/68, the 11/82 and the Omni 15mm (which I plan to eventually phase out in favour of a TV 15mm plossl, which is hear is very good and can be found for as little as 50£ second hand!)
  18. After buying a powermate to expand my magnification collection toward the highest end feasible in my f/6 8'' Dob, I am now considering getting my first 2'' eyepiece to obtain a proper wide TFOV, compatible if not bigger with what is offered by my Omni 32mm plossl, but with a larger AFOV. Clearly I can't afford the TV's, so Nagler and Panoptics are out of the picture (the Delos and the Ethos are dreams to be fulfilled when I finally have a stable income). I currently own a 20mm 68° maxvision and I must say that I've been quite pleased with it's performance. I understand that the Maxvicsion 68° series uses a scaled down design, so the relative performance of the 34mm should be similarly satisfactory for me. Enters the 24mm 82° maxvision, which is currently selling at 100€ at dresser.com, which should be a steal. I can take the 82° field with some difficulty, but when I finally manage to keep clear of the blackouts I must say that the experience is really rewarding (the Double Cluster in the 11mm 82° ES is nothing short of a stunning view!). So, is there any clear reason I should go for one or the other or is it down to my personal taste/choice? Thanks!
  19. The star that single handedly expanded the universe!
  20. Edit: I just found out it goes on through the other region of the galactic plane! It failed to load them altogether before! Ok, this is now officially priceless.
  21. It's basically just the galaxy center region and its immediate surrounding. I wouldn't have minded a proper crazy high resolution picture of the Cygnus region! Still, this is extremely impressive. It can almost quench my thirst for the stars in these interminable weeks away from home
  22. It takes an awful long time to load properly once you zoom in to a certain spot. Is this OIII? It looks like a narrowband photo.
  23. Is the reducer generally a suited tool for visual observing? Or exit pupil / other problems ensue?
  24. Reductio ad Panzerfaustum as a general rule for SGL's threads?
  25. Right, that was probably my inexperience-driven enthusiasm talking. As a physicist I'd love to know which features of the optical system affect the most. Just for fun, everything is better when you know how it works, which is why I love seeking out eyepiece schematics on the internet
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