Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

TheUKDave

New Members
  • Content Count

    17
  • Joined

  • Last visited

Community Reputation

1 Neutral

About TheUKDave

  • Rank
    Nebula

Profile Information

  • Location
    Essex
  1. Hi all, i was just going through some of my bits and bobs looking for the 2" 'end' of my Baader zoom mark iii, and I came across an accessory (see attached pic) that I never figured out at the time what it was, and now don't even remember what it came packaged with. When I started out a couple years ago, I purchased in one go, the skywatcher evostar 100ed pro, the heq5 mount, and the above zoom eyepiece (with Barlow). This widget must have come with one of them. Can anyone tell me what it is, or what it's for? If it helps, I can tell you that the internal barrel is threaded all the way down (you can't see that in the pic, but trust me, it's alllll the way from top to bottom), and it snugly accepts 1.25" eyepiece inside, albeit they don't slide in smoothly due to the internal thread. Finally, the top rim is the same diameter as my 2" eyepiece barrels. So it seems as though this could be a 1.25" to 2" converter (i.e. The 'top' in the photo would go into a 2" diagonal, and the you put 1.25" eyepieces in the bottom), but if so, why is the inside threaded? And what (of the above) did I buy that came with it, considering the 100ed already had a diagonal with a much neater, smaller insert that reduces the 2" internal down to 1.25"? Many thanks, Dave
  2. I've noticed as well that these 2 tripod/mounts: http://www.firstlightoptics.com/skywatcher-mounts/skywatcher-eq5-deluxe.html http://www.firstlightoptics.com/celestron-mounts/celestron-omni-cg-4-mount.html Whilst being from different manufacturers seem to have identical tripods (and both identical to my HEQ5). Do you think therefore a CG4 head would fit on my tripod? Cheers, Dave
  3. Thanks for the skytee suggestion, but that's a fairly heft (and expensive) mount, and I'm looking for more of a lightweight (and cheap :D) option. I had another thought though, as part of my "smaller/lighter/more-portable setup", I'm considering getting a Skywatcher Startravel 80, which can be purchased in various configurations, e.g. OTA only, tabletop EQ1, tripod EQ1, AZ3, etc. If I purchase it with any of those mounts, will the head go onto my HEQ5 tripod? If so, I can just discard (or sell) the tripod it comes with, and I'm all set. If those heads won't work, do you know any other configurations of ST80 that would? Cheers, Dave
  4. Do you know if the heads are available separately? Or will I have to buy a whole mount+tripod combo (then try and flog the tripod)? Cheers, Dave
  5. Hi all, I have an HEQ5 tripod/mount, but I'm looking at getting a slightly smaller/lighter/more-portable setup for grab'n'go astronomy to supplement my 'proper' get up. So does anyone know of any smaller/lighter/non-driven heads (either AZ or EQ) that will fit directly onto the tripod stand that comes with the HEQ5? That way I can easily whip out the lesser setup on a whim, but still have the option for the full-on driven setup when conditions justify. Cheers, Dave
  6. So there is a T2 adapter that it comes with, but I don't typically use it, hence I don't store it with that on. The end I lost the cap for screws into the bottom end of a 1.25" eyepeice, so it's smaller than that, and thanks for the suggestion, but 1.25" is the smallest available on that ebay link. I think I might be out of luck
  7. Hi all, I've managed to misplace the cap for my Hyperion barlow. It's the rubber cap that goes on the top of the attached image. Does anyone know where I could possibly find a replacement? Of course, annoyingly, had I lost the other one, it would be a standard 1.25" endcap, presumably those are easy to find? If so, could you point me to where I can find those, perhaps they'd also sell these. ... come to think about it, it's the end that screws into a 1.25" eyepiece, so that must also be standard thread size. Are they 'endcaps' for 1.25" filter threads? Cheers, Dave
  8. Hi Dreamlander, I'm a newbie myself, and a fellow researcher I've only recently bought my first scope, which came with a 2" diagonal, and I don't imagine how I'd cope with only 1.25" eyepieces. And bearing in mind that my scopes focal length is less than half of the one you're looking at, you'd be very limited indeed in true field of view with 1.25" eyepieces. Infact, with 1.25" eyepieces, I think you'll be limited to around 0.77° of TFOV, with 2" it would be more like 1.3°. I personally spend a lot of time viewing clusters with around 1.5-2° TFOV, so as I say, I'd definitely want the larger option. To answer your actual question, I don't see any disadvantage other than cost, and potentially the size/weight/cost of the larger eyepieces that you'll also then be buying! Cheers, Dave
  9. Thanks for that John and YKSE, I think it's kinda the answer I wanted to hear But just because I'm fickle, and because that is a stonking deal on the ES 100° 20mm eyepiece, I've taken a slightly different tactic. I'm going to grab the 20mm eyepiece, and also, I heard some good things about the Skywatcher 38mm panaview eyepiece, so I've got that on order too. Being that the panaview is about 1/2-1/3 the price of the ES eyepieces, it's a less considered purchase. And since it gives an almost identical TFOV as the ES 40mm I was looking at, I might pick up the ES eyepiece later on, compare the 2, and sell on one of them Cheers, Dave
  10. Wow, that really is a good deal. I've been looking at the same piece for a couple of weeks now on OPT (a US company) which has it for only $300 brand new - even cheaper than your link! I've been waiting for a friend (or colleague) to go to the US so I get them to bring me one back with shipping and VAT and import duty, it'd wind up being about £300, which is still a bargain, but just less of one. I actually may well end up getting it from that site actually. But I think I would like it in addition to the eyepieces I was originally talking about, I'm still interested in a 30+mm eyepiece for larger DSOs and/or for DSO-hunting. Cheers, Dave
  11. I was going to post a topic just now which was going to be titled the same as this. So if the OP has had their answer, hopefully they wont mind me hijacking the thread to ask the same question, but with some different options I'm using just the one scope, SW 100 ED (900mm f/9). And I'm looking at some ES eyepieces, and given that my current widest field eyepiece is the 28mm (I think it's around 56°) that came with the scope, and I'm hoping to achieve a wider field than that, to get the best possible views of things like Pleiades, Andromeda, and also just as a general finder eyepiece. I'm wondering which of the following 2 main options people would recommend: ES 68° 40mm Magnification: 22.5xTrue Field of View: 3.0° Exit Pupil: 4.4 mmCost: ~£210ES 82° 30mm Magnification: 30xTrue Field of View: 2.7° Exit Pupil: 3.3 mmCost: ~£230Both have similar true fields, close to the maximum for a 2" diagonal, and I gather that the larger exit pupil should make the 40mm a 'brighter' (??) eyepiece, and therefore better as a finder or viewer of fainter objects. Is that standard wisdom, or is that debatable? I'm also considering the ES 68° 34mm, since I've heard some good things said about it and it's cheaper at around £175. There's even a Televue 55mm Plossl, which would still give a sensible exit pupil of 6.1mm. But I for some reason I'm leaning towards the 2 above ones. There'sI'll point out that the 31mm Nagler would be my ideal eyepiece, but ... that's almost 3 times the price of any of the above. Oh, and finally, I think I've decided that in the nearish future, I hope to own the ES 100° 20mm, and then the 14mm eyepieces. But for the immediate future, I'd like to get the far end of my eyepiece collection started. Cheers, Dave
  12. Not sure if this is the right place to post this, but I'm looking for replacement rubber eyecups for some eyepieces, and haven't yet had any luck in my search. In short, I was rummaging around in the loft and found my late Dad's old telescope bits. the was a bunch of Meade super plossls in there, and they're all missing their rubber eyecups. Well, one of them wasn't actually missing it, but it kinda dissolved on me shortly after taking it out. The rubber eyecup from a 7mm nagler (also found in the box, a significant and unexpected bonus thanks Dad!!) also fits all of the Meades, so hopefully it's a standard thing? Any help appreciated! Cheers, Dave
  13. Dredging up an old topic here, but since I'm considering this eyepiece range myself right now, I wondered if there was any new news in the past couple of years on this eyepiece. I've only read 2 in depth reviews on it, one fairly positive (the one linked above in this thread), and one fairly negative (http://www.cloudynights.com/page/articles/cat/user-reviews/explore-scientific-25mm-100-degree-eyepiece-r2813). Like the original poster, I think I'm going to start collecting the ES 100 deg range, but for the widest field eyepiece, I'm wondering if the ES 82 30mm is going to be better for me than the 25mm 100. It's certainly better value! Cheers, Dave
  14. So ... you hear a lot of people saying things like, "you want the least magnification/widest field of view you can get for DSO/andromeda/etc", and I was basically wondering where you draw the line with that. For example, one line you might draw is that since Andromeda has an an angular size of about 3 degrees, is there any point in an eyepiece that goes wider than that? Probably not, right? Another line you might draw is with exit pupil, on certain scopes, certain focal longer lengths might have such a large exit pupil that you'll waste aperture. For me - Skywatcher 100mm ED DS Pro refractor 900mm focal length (f9) - an exit pupil too large is not too much of a concern, since I'd need to go beyond 50mm to get wastage there, and being a refractor it's only about wasting aperture as opposed to seeing a central obstruction. So I'm just wondering how I would realistically be able to just get the best view. Without mentioning brands, and just combining focal length and apparent field of view, on my scope (100 ED DS Pro 900mm/f9) I could get something like a 45mm 60° giving the full 3 degrees with an exit pupil of 5mm ... or perhaps a 40mm at 68° (same total field with a smaller exit pupil) ... or potentially a certain 25mm 100° eyepiece which would give almost 3 degrees with a much smaller exit pupil. It feels a bit like swings and roundabouts. Do I pay more attention to eyepiece quality, or to it's native specs (focal length/apov)? And if the latter, then should I be attempting to get the full view in a longer focal length eyepiece, or a shorter one with a wider field? Which would look better considering how faint Andromeda is? Cheers, Dave PS - mentioning brands now I'm considering a bunch of wide field pieces, but to name a few, there's the ES 100° 25mm, the ES 82° 30mm, ES 68° 40mm eyepieces that all give about the same total field, but with different designs and focal lengths. I don't know which of these would be 'best' for M31. Don't get me wrong, there's plenty of other brands, for example the Panaview 70° 38mm also offers the perfect 3 degrees - and at a much lower price point. But I was thinking more conceptually at first. What 'properties' would you look you for to view M31? not so much what 'brands' would you look for?
  15. Hi John, No, I don't wear glasses. I have an astigmatism in my left eye, but don't even wear my specs on a normal day since I'm right eye dominant anyway, and that one's fine So I'm not too concerned about eye relief. I'll certainly check out that site. Thanks a lot. Yeah, I'm basically torn between buying some cheaper eyepieces, and only getting the fancy ones if I decide I still really want to try them. But I figure I probably WILL still want to try them regardless, and then I'll just be losing money on the cheaper ones I already bought. I guess I can just wait for a nice 100 degree example to come up on the second hand market. Cheers, Dave
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.