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About Steve789

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    Star Forming

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    Falmouth, Cornwall UK
  1. I did ask Altair Astro if the scope and flattener would be suitable for full frame before purchasing and their reply was "Yes just!" which gave me a clue that some cropping might be necessary. I'll give the 1100D a try but I think I'll be disappointed with it's sensitivity. I'm thinking about a 100D if I can find a cheap one. I believe it's the lightest DSLR canon do and the sensor seems pretty good for astro. I imagine it'll be easy enough to mod. I've done 3 DSLR mods in the past.
  2. Steve789

    Milky Way

    I use a 6D for milky way photography. I have a Samyang 14mm f2.8 which is great for the money. Gives good results wide open although the stars are skewed as you get closer to the edges - still very good but noticeable if you're a perfectionist (not good for large prints). I've recently bought a Tamron sp 15-30mm f/2.8 di vc usd. This lens is exceptional with much better stars at the edges than the Samyang. This performance comes at a cost though as the Tamron is much more money than the Samyang. It's also a beast of a lens weighing over a kilo and very large. I call mine the Behemoth. I wanted it because I found the fixed focal length of the Samyang a bit restrictive with regard to composition however in the short time I've used it I've rarely used it at anything other than 15mm.
  3. Last night was first light with the Star Adventurer and Altair Starwave 70ED. First lesson learnt was to make sure you've got good batteries in the SA! I thought I'd overloaded it and spent ages trying to get it balanced and double checking PA only to find the old batteries I'd put in had run out of juice. Once I had new batteries in it performed as well as I could have hoped. I managed 1 minute subs of which 90% were keepers. I'm already sourcing a better tripod as my carbon Benro photographic tripod is too bendy with that much load. I'm thinking about getting an old EQ tripod. I'm sure with a better tripod I can improve the PA and push the subs a bit longer. Here's a very quick stack of Andromeda using the Canon 6D, uncropped with very little editing done. I need to investigate the spacing for the field flattener because as you can see it's not doing a very good job with heavy vignetting. This may be because I'm using a full frame camera. If anyone can tell me why I get hollow stars with DSS I'd love to know (I may start another thread about this). Currently I wouldn't recommend this set-up for someone starting out with the SA. Balancing the scope is right on the limit with the 6D attached so much so that you have to have the L bracket mounted so low on the SA that you can't use the illuminated polar scope with the L bracket attached. In hindsight I wish I'd gone for a 60mm scope...
  4. As an update I have the Star Adventurer and Altair Astro 70ED set up in the spare room. The 70ED is much bigger than I envisioned - I think I may have ordered the wrong scope... Naturally I've weighed everything as I've loaded it up onto the Star Adventurer. With the 70ED, Reducer, 6D, L bracket and counterweight I'm coming in very close to the max payload of the Star Adventurer - never a good idea for astrophotography! I can save a couple of hundred grams by using my 1100D instead of the 6D but I really want to be able to use both. In order to get everything balanced I've had to flip the supplied dovetail base so it's facing backwards and the counterweight is at full extension. I'm already planning in my head ways of mounting any future guiding set-up on the end of the counterweight bar and replacing the counterweight. There's potentially some clear skies tonight so hopefully I'll get a chance to test it. Not sure my tripod is stiff enough though.
  5. Yeah I was thinking about the WO 61 until I saw the Altair 60EDF but then I saw the 70 ED and realised with the right Flattener/Reducer I could have a faster scope. Hopefully the 70 ED will be alright cos I just ordered one from Altair. Focal length shouldn't be an issue as I'm getting the 0.8x Reducer/Flattener which will bring it down from 420mm to 336mm. We'll see if I can get away without guiding - the whole point of this setup is to keep it simple and quick to use. One of the reason's I stopped imaging with my old kit (HEQ5, CCD,Laptop, Autoguiding etc) was because I got fed up with spending over an hour to set-up only to get 5 minutes imaging time before clouds rolled in. I don't know if it's because I live near an estuary in Cornwall but that used to happen a lot! I'll try and keep this post updated with my results for anyone interested although it might take a while. I haven't even got the Star Adventurer yet. I have the Star Adventurer Mini which I'll probably put the 70 ED on just for giggles while I wait for it's bigger brother to arrive
  6. Which would you choose for DSLR astrophotography with a Skywatcher Star Adventurer? The Altair Astro 60 EDF F6 weighing 1.5Kg https://www.altairastro.com/60EDF-ED-R-Refractor-Telescope.html or the Altair Starwave 70 ED F6 (using a 0.8x Flatenner/Reducer will be F4.8) and weighing 2Kg? Both cost about the same and have similar focal lengths, the 70 ED being slightly wider at 336mm. Currently I'm favouring the 70 ED mostly because of the faster F-Ratio but also because it comes with some nice little accessories like a case and red dot finder (I know the accessories shouldn't sway me but they do). I'm just a bit worried about the extra weight - I know it will fall well within the max payload of a Star Adventurer but I like to have plenty of room for adding extra stuff later. If any of you are already using this scope or similar with the Star Adventurer I'd love to hear of your experience with it. I assume the 60 EDF has better quality glass as the blurb seems to make a fuss about S-FPL 53 glass but I don't know what that means to be honest. Thanks in advance for your comments and by all means jump in with a "I wouldn't choose either of those I'd choose..." answers. My budget is around the £500 mark including a flattener.
  7. Hi JemC, I can't say I've ever used a SW ED 80 Pro (or any other refractor for that matter). I used it with a skywatcher Explorer 150pds to good effect. When trying to figure out field of view with camera/scope combinations I've always used this site; http://www.12dstring.me.uk/fovcalc.php It allows you to input the scope and camera makes and models and gives you examples of the field of view for different Messier targets.
  8. Having decided to go backwards and abandon CCD imaging for a DSLR I am selling off my CCD filters. They are all in immaculate condition and have always been kept either in my filter wheel or in their plastic cases. -Astronomik 1.25" 12nm Oiii CCD Filter £70 -Astronomik 1.25" 12nm Ha CCD Filter £70 -Optical Vision 1.25" RGB-IR Color CCD Filter Set £70 Buyer to pay Paypal fees and postage costs or collection from Falmouth, Cornwall.
  9. Atik 315L+ Mono CCD & Manual Filter Wheel For Sale - Great condition CCD with original box, 12V power supply, fisheye lens & CD. -Starguider 5 position manual filter wheel with adaptors/spacers (currently set for Skywatcher 0.9x Coma Corrector) -USB lead and AC power supply -Can include solid padded case if wanted. £500 plus postage costs. Happy to accept paypal if buyer covers charges or cash on collection from Falmouth, Cornwall. (RGB filter set not included)
  10. Steve789

    Celestron C8 SCT OTA

    Celestron C8 XLT OTA -Good condition C8 with Starbright XLT coatings -ADM Vixen style dovetail bar. -1.25" visual back. -Red dot finder and/or finderscope -Bahtinov mask -Dew strap and dew shield -Baader visual solar filter -The following 1.25" eyepieces; Meade 26mm Super Plossl, super 10mm, Baader 2.25x barlow, star diagonal. £450 Cash on collection from Falmouth, Cornwall.
  11. Steve789

    What's a used C8 worth?

    I was thinking of subtracting 1/3 but the new price of an OTA is £1069 which would make the asking price £700 and I'm pretty sure I didn't pay that much. It's one of the reasons I've made this post. I think I'll go with £450 ono and see if I get any interest. Thanks for the advice.
  12. I have a Celestron C8 OTA with the Starbright XLT coatings and Fastar compatible that I am about to sell but for the life of me I can't remember what I paid for it! I seem to remember buying it (used) on a bit of a whim and have only used it myself once or twice. It's in great condition and I'll be throwing in some accessories such as dew shield, cheap eyepieces etc. A quick browse shows used ones selling from £300 to £500 which is quite a big difference in price. Would anyone be kind enough to suggest a reasonable asking price.
  13. Steve789

    Skywatcher Star Adventurer Tripod

    Thanks for the offer. Like I said I'm going to wait until I get the SAM and try it with my existing tripod before I make a decision. If I decide to go for the SW tripod I'll send you a PM to see if you still have it. I should have the SAM by the weekend so hopefully I'll have a chance to try it out and get an idea of what it needs in the way of a tripod.
  14. Steve789

    Skywatcher Star Adventurer Tripod

    Thanks for the quick replies everyone. Mr niall that's reassuring to hear although JamesF and kendg have now got me thinking of alternatives! I hadn't realised carbon tripods had got so cheap. I think I'll wait until the SAM arrives and try it with my Benro tripod. If I think the Benro's solid enough I'll get something like the Neewer mentioned above (I like the idea it could work as a spare if my Benro breaks). If not I'll go for the Skywatcher tripod.

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