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09-27-2015, 06:04 PM   #1
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Attaching a telescope

Over 25 years ago, I bought a small telescope. Upon rediscovering it recently, I noticed it was designed to be mounted to old 35mm SLR cameras. Can I mount this to my K-50 with an adapter of some sort? Looking on eBay, I found something that seems like it may work: Qualide T Mount Lens Adapter for Pentax K 35mm SLR Film Camera 25 166 2227 | eBay

Is this the way to go?

09-27-2015, 06:38 PM   #2
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That should work. There are many different ways to attach an SLR to a scope, depending on what you are trying to shoot. That device is called a T-mount adapter. If you use that to attach the scope, the scope will become a fully manual lens of the same focal length and the same aperture as the focal ratio of the scope. For example, if the scope has a focal length of 400mm and a focal ration of 4, it will function as a 400mm f4 lens. To meter with it, you will have to set the camera to M, choose an ISO, and use the green button to let the camera pick the shutter speed.
09-28-2015, 05:55 AM   #3
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If you intend to use it for astrophotography, then green button metering will probably get you a very overexposed and trailed image considering the general across-the frame darkness of most astro images. Better just to experiment manually with shutter speeds.

Since this scope presumably won't be using a tracking mount, you will achieve best results by using multiple exposures at a high ISO and relatively fast shutter speed and then stacking them with one of the various astro stacking packages available out there.
09-28-2015, 04:41 PM   #4
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Thanks for the tips and suggestions, guys!

I've ordered a T-Mount and will experiment with exposure and ISO once I start taking pics.

09-30-2015, 07:30 AM   #5
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Was that the right adapter?? Or there is something better? How does the telescope - camera combo work? Please provide some detailed technical information.
Do post some photos too.

Such useful threads should have a proper closure as some of us have Telescopes too.
Regards.
09-30-2015, 04:02 PM   #6
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Did you get a T-mount to eye-piece adapter also?.
From left to right: K-mount to T- mount adapter, T-mount to 2" eyepiece and a T-mount to 1.25" eyepiece adapters.
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