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Pentax A* 1200mm F/8 ED (IF)
Posted By: SteveM, 02-20-2016, 12:44 AM

Noticed an A*1200 up on ebay (can't speak to the lens or the seller....just passing along the info). Not cheap but still a good price for what they have been selling for.

Pentax A 1200mm F 8 ED IF Lens Mint | eBay

A few pics from mine.....






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02-20-2016, 01:28 AM   #2
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What are these like for astrophotography?
02-20-2016, 01:41 AM   #3
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QuoteOriginally posted by Theov39 Quote
What are these like for astrophotography?
I've taken some moon shots but I wouldn't say it's ideal. At 1200mm you can watch the moon move across the field of view so I would be interested to know how much the K1 Astro Tracer could compensate for the movement...probably 3 seconds at 1200mm? (guessing). It's long and needs a Gimbal....you would have a hard time pointing it straight up.

You could go for a telescope that is designed for photography, (I have the Pentax 100 SDUF II but sadly haven't used it for photography). Tracking moves the whole unit which is helpful at large magnification.
02-20-2016, 02:01 AM   #4
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Thanks Steve. That's good to know. i will have a look for an appropriate telescope. Might be a bit cheaper then $10 grand too!

02-20-2016, 03:00 AM   #5
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QuoteOriginally posted by Theov39 Quote
Thanks Steve. That's good to know. i will have a look for an appropriate telescope. Might be a bit cheaper then $10 grand too!
It would be, but still expensive. I'd do some research for what works with photography and the body you plan to use. Some here on the forum have had very good results with a shorter focal length using stacking software. Quite amazing photos without a huge lens.

The 1200/8 has it's place for long distance photography. Every advancement in camera bodies has extended it's range, although I suppose eventually it will fall behind, but not so far.
02-20-2016, 06:31 AM   #6
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The FL is somewhat less insane with the lens mounted on a K-1 r/t a crop sensor camera.
02-20-2016, 10:02 AM   #7
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Steve, thank you for sharing the link and your photos. The shot of the ship is really nice.
02-20-2016, 11:27 AM   #8
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QuoteOriginally posted by dadipentak Quote
The FL is somewhat less insane with the lens mounted on a K-1 r/t a crop sensor camera.
It's been much more forgiving when I've used it with film....crop is a little tricky.

QuoteOriginally posted by TomTom Quote
Steve, thank you for sharing the link and your photos. The shot of the ship is really nice.
Thanks TomTom......there is at least one other member on the forum with a copy of this lens that have taken some very nice photos. I guess we'll see if this copy shows up here as well....

02-20-2016, 02:37 PM   #9
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Why does the EXIF on the eagle photo say taken at 800mm?
02-20-2016, 04:17 PM - 1 Like   #10
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QuoteOriginally posted by mee Quote
Why does the EXIF on the eagle photo say taken at 800mm?
It is the highest focal length selection available in SR, when shooting with a lens that does not communicate with the camera.
02-20-2016, 06:47 PM   #11
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QuoteOriginally posted by Theov39 Quote
Thanks Steve. That's good to know. i will have a look for an appropriate telescope. Might be a bit cheaper then $10 grand too!
You might check around your area for an astronomy club - my experience here is that members are very helpful and forthcoming.
02-20-2016, 11:43 PM   #12
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QuoteOriginally posted by mee Quote
Why does the EXIF on the eagle photo say taken at 800mm?
QuoteOriginally posted by Ex Finn. Quote
It is the highest focal length selection available in SR, when shooting with a lens that does not communicate with the camera.

Correct......the K3 can go up to 2000mm......the rest stopped at 800mm
02-23-2016, 07:24 PM   #13
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Generally if you are talking over 400mm and you only want to shoot moon and planets, a long focal length reflecting telescope will give you much more bang for the buck than a large telephoto. Something like a Maksutov-Cassegrain or Schmitt-Cassigrain. If you want something to shoot a nebula or galaxy, you need lots of aperture (size of the front element) and a short f-ratio. You can spend just as much for a good refracting telescope as you would for for a super telephoto because of the expensive ED glass that is in a super telephoto is also in many high end refracting telescopes. Spend a lot of time on research on forums and reading websites before buying a telescope. Also remember you need a good mount\tripod for your combination. Astronomy is just as expensive hobby as photography, and its even more expensive if you want to do astrophotography as I found out. First try with a 300mm and the astrotracer...because that by far is the cheapest way to get into the hobby of astrophotography....
02-23-2016, 07:59 PM   #14
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The price isn't a steal, but it is the only one available anywhere at the moment.
02-23-2016, 08:02 PM   #15
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Now imagine that with a q behind it.
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