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FrankC · 08-11-2014, 04:53 PM

Hi all,

Does anyone know if it's possible, and if so, how to connect a 645D to a Celestron C4.5 reflector telescope?

Thanks,

Frank

ElJamoquio · 08-11-2014, 05:43 PM

Sorry, no help.

But here's a manual.

ftp://downloads.celestron.com/pub/manuals/telescopes/c_series/31026_c4.5/manual/31026_c4.5.pdf

They reference 35mm. Didn't see anything about 645.

---------- Post added 08-11-14 at 05:48 PM ----------

Hmm. Looks like the standard method was a T-mount, which I don't think would allow a 645 flange distance.

**interested_observer** · 08-11-2014, 06:08 PM

It's going to depend on the image circle projected by the telescope. The 645 is going to need a larger image circle to take advantage of the larger sensor, then the 135. Also, the mass of the camera is going to be much larger that the scope, mount and legs are going to have to support.

https://www.pentaxforums.com/forums/6-pentax-dslr-discussion/113178-astrophot...ml#post2895867

08-11-2014, 04:53 PM	#1
FrankC Veteran Member Join Date: Dec 2011 Photos: Gallery Posts: 318	Telescope adapter for 645D Hi all, Does anyone know if it's possible, and if so, how to connect a 645D to a Celestron C4.5 reflector telescope? Thanks, Frank

08-11-2014, 06:08 PM	#3
interested_observer Loyal Site Supporter Join Date: Jun 2009 Location: Tumbleweed, Arizona Photos: Gallery \| Albums Posts: 5,107	It's going to depend on the image circle projected by the telescope. The 645 is going to need a larger image circle to take advantage of the larger sensor, then the 135. Also, the mass of the camera is going to be much larger that the scope, mount and legs are going to have to support. https://www.pentaxforums.com/forums/6-pentax-dslr-discussion/113178-astrophot...ml#post2895867

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08-11-2014, 05:43 PM	#2
ElJamoquio Veteran Member Join Date: Feb 2011 Posts: 4,893	Sorry, no help. But here's a manual. ftp://downloads.celestron.com/pub/manuals/telescopes/c_series/31026_c4.5/manual/31026_c4.5.pdf They reference 35mm. Didn't see anything about 645. ---------- Post added 08-11-14 at 05:48 PM ---------- Hmm. Looks like the standard method was a T-mount, which I don't think would allow a 645 flange distance.

Telescope adapter for 645D

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