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would this work?

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#1 farm24

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Posted 18 May 2021 - 08:43 AM

would this work if you take a skywatcher go-to 10" dobsonian and use the go-to to lock onto something say the sombrero galaxy could you make a special adapter for a camera t-ring that rotates it to kinda mimic a equatorial mount so you don't have to buy a $10000 EQ mount you could just use the built in alt-azimuth?



#2 Doug Culbertson

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Posted 18 May 2021 - 08:50 AM

Field rotator is probably your only option. They aren’t exactly inexpensive though. Heres one example but you can do a search for telescope field derotator to find others.

https://telescopes.n...on-rotator.html
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#3 jerahian

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Posted 18 May 2021 - 08:50 AM

would this work if you take a skywatcher go-to 10" dobsonian and use the go-to to lock onto something say the sombrero galaxy could you make a special adapter for a camera t-ring that rotates it to kinda mimic a equatorial mount so you don't have to buy a $10000 EQ mount you could just use the built in alt-azimuth?

Yes, it's called de-rotation and is supported by the major brands of camera field rotators.  I'm not sure of the full line-up of brands which do or do not support this, but I know at least the Pegasus Astro Falcon Rotator supports it.  The "software calculates Rate of Rotation (RoR) based on the site latitude, target altitude and azimuth position."  There is an image of their software interface providing this feature on their website at the link I provided under "De-Rotation support for Alt/Az mounts."

 

CS, Ara


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#4 CowTipton

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Posted 18 May 2021 - 09:04 AM

Maybe better off building an eq platform?

 

Field rotators are expensive.



#5 WadeH237

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Posted 18 May 2021 - 01:09 PM

Even if you can find a field rotator that works for you, remember that your scope has diffraction spikes from the secondary spider.  A field rotator will keep the objects in the sky from rotating in the field, but not parts of the telescope.  Because of that, the diffraction spikes will rotate in the field, even with if you use a rotator to keep the field.

 

An equatorial mount is the way to go.  That said, I would not recommend spending $10k on one.  You can get a decent mount for getting going with deep sky imaging for $1500 to $2000.  Such a mount wouldn't carry your 10" Newt, but it would carry a refractor with no problems.  Pair it with a small pixel camera, and you'd have something that could match the quality of the dob (at least for imaging, where aperture is not the most important thing), and you'd be into the system for far less than a high end mount.  And you'd still have the 10" to do visual work while the imaging system is doing a long integration run.


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#6 farm24

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Posted 18 May 2021 - 01:14 PM

Maybe better off building an eq platform?

 

Field rotators are expensive.

do you have any tutorials on building one?




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