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Driven mount for Canon Camera.


MikeMS
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All.

I purchased a ETX 90 some months ago and the mount is no good for the telescope. I have put the telescope tube on a dovetail and can use it on my GEM mount.
 
I thought what to do with the RA driven mount for it  why do try bolting my canon camera on it. It took less than one hour to make the part to place the original tube holding arm and the first bolt I picked up fits the bottom of the camera and is long enough to go through the newly made part. And that part is two plywood disks that go into the arm.

My aim was to use the dec locking mechanism, but the only disk cutter I had is 2 mm too small, so the camera is bolted to the ETX arm, but it moves if the bolt is loosened.

And no, I do not know how I will focus it, I suppose I can pick up the entire unit and adjust the camera.
 
As I am living overseas and the camera is uncooled the chip gets warm before any star trailing!!
 

I am at Latitude 25 degrees, hence the extra tilt.

Kind regards,
 

Mike.

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A clever use of the parts there Mike... As for fitting the camera, you could use something like the Manfrotto 323 QR adapter and 200pl plate. I use those and it means I can more easily focus the camera without messing with the mount etc, then just clip the camera on top. (I've heard of problems with non OEM 200pl plates, where the slip or don't lock in place properly, so, whilst it's more expensive, I'd go with the original). 

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I didn't know you could get Manfrotto adapter like this

A clever use of the parts there Mike... As for fitting the camera, you could use something like the Manfrotto 323 QR adapter and 200pl plate. I use those and it means I can more easily focus the camera without messing with the mount etc, then just clip the camera on top. (I've heard of problems with non OEM 200pl plates, where the slip or don't lock in place properly, so, whilst it's more expensive, I'd go with the original). 

I didn't know you could get such a thing from Manfrotto, thanks for the tip!

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Now with polar alignment tool.

Okay, now with a bolt shoved down one of the dec arm holes, the sleeve of a pen pushed onto it and the laser pen slide in, but an alignment tool never the less.

I will report back on the success of this.

Regards,

Mike.

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hey,

nice idea.

i did something similar in april 2013.

i used some metal parts for building a platform for a ballhead.

the platic etx-fork parts (where the etxtube was mounted to the fork) fitted to this platform.

then i bought an off-axis polarscope holder for the vixen polaris:

http://www.teleskop-austria.at/shop/index.php?lng=de&m=2&kod=mont-pol-oah-la&skod=%2013&om=Teleskop%20Montierung

just drilled this into the bottom of the extmount. ->precise polar alignment!

see the pic's here:

http://imageshack.us/photo/my-images/6/imagerhsi.jpg/

http://imageshack.us/photo/my-images/849/imagexkwv.jpg/

some photos done with it:

http://www.astrobin.com/46902/

http://www.astrobin.com/39254/

http://www.astrobin.com/38829/

http://www.astrobin.com/38631/

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