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Lews Therin

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About Lews Therin

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    Nebula

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    Milton Keynes
  1. Thanks for the added replies. The 28mm Nirvana looks good, and all of the reviews I've found have highly recommended it. Couple of questions though... It says the ep weighs 1kg, and it is clearly very large, so... Is it going to fit and work well on my scope with a 2" diagonal (I'm planning to purchase the matching Altair Lightwave one - http://www.rothervalleyoptics.co.uk/altair-astro-lightwave-2-dielectric-diagonal-push-fit.html which appears to be a good quality one)? I know some cheaper diagonals bend, or just can't support that kind of weight. Secondly, all of this will be mounted on a Vixen Porta 2 mount, which says it supports 6.5 or 8kg scopes (depending on which site you go on). My tube weighs 3.9kg, so with the ep and diagonal will weigh about 5kg. Is there going to be any kind of balance issue?? The Vixen can be tightened or loosened as necessary.
  2. Hi John and Ricochet, Thanks for the replies. I'd forgotten to update the signature - unfortunately I had to sell the dob, and I also sold a decent 26mm 2" that I had used with it. I have seen the Hyperion 71º aspheric 2nd hand, and that is a proper 2"... The ES Maxvision doesn't seem to be much different in price from the Aero. That leaves me with a choice of 28 or 34mm. As for the barlow, I've never had an issue with my standard 1.25x... I've used it with each of my eps at some point, and other than a reduction in quality, I don't remember much of an eye relief issue. Maybe add a better planetary ep to list at the same time then.
  3. Hi guys, I’ve just purchased an Altair Astro 102ED refractor - 715mm focal length. I’ve currently been using a Skywatcher 127 Mak, and some fairly cheap and cheerful 1.25” eps. Over the coming months, I want to get some new much better quality eps - although having just bought the new scope, a new mount, and still needing a 2” diagonal… I’m probably just going to purchase 1 new ep for now. I currently have moderate quality eps of 5mm, 10mm, 20mm, 25mm - and a 2x barlow in 1.25”. I am 34, wear glasses, and I’m also in a heavily light polluted area. For my main primary lens, I’m looking for something to give a very nice wide view - but preferably not (much) above £100. I’ve read quite a few reviews of different eps, although in many cases, the people involved had significantly different scopes. The types I’ve been looking at are: *Skywatcher Aero ED 2” (30mm or 35mm) - 68ºFOV *Baader Hyperion 68 21mm/24mm (bit confused, but saw somewhere that if used as 2”, they are 30mm??) - and can be modded with rings to give several other focal lengths. *Baader Hyperion Aspheric 31mm 72ºFOV - above what I want to pay, but appears to get amazing reviews. *Explore Scientific 68º Maxvision 34mm *William Optics SWAN 33mm 72ºFOV I plan to purchase a 2” barlow as well, or at least very soon. What are your suggestions please? Is 30-35mm good? 20-25x magnification with a good FOV sounds promising - especially after “looking through a straw” with my 1500mm focal length Mak. Also, for a planetary ep, what would be a good budget option? My 5mm seems to have quite bad CA, and I was wondering if I could get away with something like Skywatcher’s UWA Planetary Eyepieces (around 4/5/6mm)? Thanks for any advice and wisdom…
  4. Thanks for the replies. The Lunt vs PST shootout is interesting, and confuses the matter a bit more - Stephen Ramsden's reviews seem to indicate that the Lunt was considerably superior to the PST, as have a couple of shootouts on other forums. Perhaps it is as some of the posters commented, that PST etalons vary between 0.7 - 1.0A, and it really depends on which one you get. PST modding looks interesting, albeit somewhat fiddly, and expensive. I don't have any refractors to cannibalize, so I assume it would require something like an 80mm scope at £150-200, a Baader ERF at £400, bigger Blocking Filter?, and ??? Those are fantastic images, Michael - I can't wait to try imaging something other than the moon and planets I've done some basic white light images of the sun, but might get something better like a Ca-K filter set once my wallet recovers...
  5. Hi guys, I'm planning to buy my first H-alpha scope within the next few days, and am still trying to decide on which one. I want to do imaging with my webcam, as well as standard visual. Unfortunately, I can't afford the £1500-1700 required to buy a SolarMax 60, or Lunt LS60 - so unless I see a great deal on a 2nd hand model, I'm looking at either a Coronado PST, or Lunt LS35. Having looked a quite a few posts in the forums, and read the reviews of Stephen Ramsden on Solarscopereviews.com, *most* comparisons seem to suggest the Lunt LS35THA DX is slightly better, being easier to focus, giving a brighter image, and having a bigger 6mm blocking filter. I have found the Lunt 35 dx model for £740 from Astronomia, but Harrison Telescopes are selling a double stacked PST 0.5A for £1029. Lots of reviews say the double stacked PST is far better than the single stacked PST, but would it be worth the extra £290 over the Lunt? £1029 is a bit out of my price range, but I'd probably be willing to save for another month if the difference in quality/usefulness was big enough. Initially, I thought I would just get the basic Lunt or PST, then buy the extra etalon in the future, but I cannot find the Lunt 35mm etalon anywhere (despite seeing people mention it), and the PST 40mm etalon appears to be £800 (which doesn't seem right, when a 0.5A costs £1029, and a 1.0A costs £659 (£370 diff)). So, having said all that, which is the best option to go with? 1) Go with a basic Lunt 35, then perhaps save for a 60mm in a year's time. 2) Save for a few weeks, and stretch to a 0.5A PST? Many thanks in advance...
  6. They are both lovely photos - I think the main advantage of the refractor shot, is the terminator giving more detail, rather than it being a better scope necessarily. Knowing the yoga positions I've ended up in with a 120mm refractor, I don't envy you with a 150mm... I'm enjoying standing up straight with my new 12" dob!
  7. Amazing images - as always
  8. Lovely images - especially like Tycho, and the craters on the farthest south part in the mosaic image - using a webcam really does make a clear difference on the edge, and terminator
  9. Nice images, especially with a 70mm scope... With the amount of light pollution in my area, the orange one is more "natural"
  10. They are far better than any afocals I've managed - the few times I've tried it, either the phone lens hasn't been lined up right, or I've moved the scope by touching it with the phone... I tried a few shots last night, before connecting my camera, but they didn't turn out well. Image 9 is my favourite
  11. My new 12" GSO 980 Dobsonian is now all set up, and has had its first light - and first photos For some reason, my ccd or laptop decided to play up, so in the end I just used my Sony NEX5. Required a bit of re-balancing with the camera attached - something I'm not used to from my refractor... This was my first prime focus image: After that, I attached the camera to my 2x barlow, took some photos, and then stitched together this mosaic in Photoshop (unfortunately I missed a bit of the moon ). Once I sort out the issue with the ccd, I will fire up Registax, and see about getting some closer images... Visually, at 300x, the detail was incredible compared to my 120mm refractor - and no chromatic aberration - JOY! :laugh:
  12. 29, but 30 is looming ominously... Always been interested in astronomy, but most of that time has just been using eyeballs and binoculars
  13. If you click on the "Youtube" button in the bottom right, it will take you to the video on Youtube, and you can subscribe from there - then, you can also set an email notification so Youtube alert you when new videos are added. BTW, David has also done some episodes on measuring distances in the sky, magnitude of objects, eyepieces, accessories, etc, so it is well worth checking back a while
  14. Astronomyshed has done a video showing you how to improve the standard Skywatcher Crayford for free: He also has a couple of other videos that cover focusing modifications... Hope that helps.
  15. Thanks for the link, Moonshane... There's a massive list of things to make/buy at some point - for the time being, I'll be sticking to cheap and DIY stuff - then some more EPs and filters once the bank account recovers My scope has now been dispatched, so am getting more excited already to see what it is like (although my 2 week weather outlook says cloudy and rain pretty much every day - just hope it is really wrong!). Whatever the level of LP, 6 times more aperture has got to have a massive effect - and maybe in the future I will get somewhere less polluted. I've lived in 13 homes so far, and this is the least light polluted - rather sad really, considering I've always liked the night sky...
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