Quote:
Originally Posted by Amaranthus
Another possibility is to use lenses for the shorter FL. These can range anywhere from 40 to 300 mm prime (you can go shorter, but it is more difficult). That is the route I will be taking. There are adapters to connect a lens to your T2 threads on the CCD, and if you are careful, you can get the backfocus (flange to focal distance) correct even with filters. Let me know if you want more info on this and I can give you all the gory details I've uncovered. I'm only waiting on the part from TS to be back in stock!
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Ok thanks Barry, that sounds pretty good, please pm the info
Quote:
Originally Posted by sjastro
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Thanks Steven - your shots look great! Good idea to go with the Pentax lenses - there is an adapter at Bintel, expensive at $449 but I guess all Ap stuff is... The lenses are under $350 though at least!
http://www.bintel.com.au/Astrophotog...oductview.aspx
http://cameraexchange.com.au/index.p...product_id=743
http://cameraexchange.com.au/index.p...product_id=742
I need to work out the FOV to decide which lens though, because your pic of ic4628 is not a great deal wider FOV than my current setup gave me last weekend. (comparison pix attached)
The 165mm 2.8 might be a better option than the 300. How long is your 'scope and which chip was that taken on?
Thanks for your input
Quote:
Originally Posted by gbeal
The Pentax 67 lens idea is a valid one, I used in the past a nice 200mm f4, and always wondered about the 300mm f4. I currently use the 75mm Pentax.
A fellow forum member has both (200 and 300mm), and is looking to sell them at some stage, if you decide to go that way. Send me a PM if you do.
Gary
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Thanks Gary, doing research atm but it sounds like a very good idea, thanks
