GPS O-1 with telescope

Started Feb 3, 2012 | Discussions thread
stephp
Junior MemberPosts: 36Gear list
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Re: GPS O-1 with telescope
In reply to QuixoticTonic, Feb 3, 2012

QuixoticTonic wrote:

If a person had the proper adapter to mount a Pentax camera to a telescope that didn't have tracking functionality, would the GPS O-1 unit provide similar functionality as it does when just being used with body and lens alone?

In other words, does it work with a telescope?

Hi,

The O-GPS-1 unit is able to tracking the stars a few dozen of seconds with a tele lens.
I played with this unit and my DA*200 (see here
http://forums.dpreview.com/forums/read.asp?forum=1036&message=39284452
or

https://picasaweb.google.com/stephanepoirier.photos/Astro?authuser=0&authkey=Gv1sRgCK_71qKb8qD9bQ&feat=directlink )

With the 200mm lens the K5/gps was able to track the stars up to 1 minute. I performed some tests with a 300mm and I don't expect good results beyond 45s.

You have to be aware of that if you plan to use it with a telescope. I guess 500mm is roughly the minimal focal lengh of telescopes, so don't expect good results beyond 20-25s.

Regards.

 stephp's gear list:stephp's gear list
Pentax K20D Pentax K-5 IIs Pentax smc FA 50mm F1.4 Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM Pentax smc DA* 50-135mm F2.8 ED (IF) SDM +6 more
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