Edge 8 HD hyperstar back focus, wrong spec on gpcam3 178c??

[Rocket Stars]

Hi all! 

At the moment, im getting a headache.. I have been in trouble to get backfocus and collimation ok. 

I have a Baader 1,25 eyepiece holder and a adapters, fitted to the Hyperstar. But not getting it right. So I decided to order a proper filter drawer and spacers. 

Interestingly, I have had a hard time to find cs/T2 adapter, and a filter drawer that matches the back focus required. 

After "some" digging. I decided to measure the camera housing. And..It differs considerably to the original specs I got with the camera. I might be stupid, and missiunderstand something? 

Anyway, I submit a pdf "quick drawing". My measurements is on about 0.1mm. I didn't bother to go to the granit flatsurface measuring stuff.. 

Am I missing out on something? I need to order the parts, so I can go imaging in the near future..please..  

 

Altair_178_hyperstar C8 EDGE HD.pdf

Edited January 27, 2020 by Rocket Stars
SWenglish spelling correction..

[michael8554]

The Altair image is patently wrong !       

17.5 + 10.2 does not equal 12.75  !!!!!

Go with your measurements 🙂

Michael

[Rocket Stars]

7 hours ago, michael8554 said:

The Altair image is patently wrong !       

17.5 + 10.2 does not equal 12.75  !!!!!

Go with your measurements 🙂

Michael

I know! 😮

I should have noticed that when setting up the camera first time. 

Explains my frustration to get focus.. Headache and starting to "discuss" my abilities.. 

[noah4x4]

If you can't quickly resolve this then Email Dean at Starizona.  Very helpful with all things Hyperstar.  Starizona can supply the correct Hyperstar adapters for any popular camera.

[Rocket Stars]

1 hour ago, noah4x4 said:

If you can't quickly resolve this then Email Dean at Starizona.  Very helpful with all things Hyperstar.  Starizona can supply the correct Hyperstar adapters for any popular camera.

I think I have it sorted. (prayers). With adapters and chims on order. Im within 0.2 mm of required back focus. Since Hyperstar is sensitive, I hope im close enough to get good focus to be able to colimate the lens. 

Plan is to get the set up working, "play" little with it. Then decide on a cooled camera. 

When I got this with the scope a while back. I emailed with Dean regarding camera choice. I have to agree to Starizona´s very good customer support! Bought their fethertouch autofucuser. Just the focus knob is super quality. Way back in the almost black and white years, I was a toolmaker. Just love the quality and feeling of the mechanics of it. yum!

 

 

Edited January 28, 2020 by Rocket Stars
spelling

[noah4x4]

If you love the Feathertouch Microfocuser, try the MKIT20 autofocus controller that works with it. Adds yet another dimension. 

[Rocket Stars]

4 hours ago, noah4x4 said:

If you love the Feathertouch Microfocuser, try the MKIT20 autofocus controller that works with it. Adds yet another dimension. 

Have the feather touch wired autofocuser with it.   Have not had time to install and play with it yet.  But I will as soon as I got this very annoying bacfocus issue sorted. 

But frustrated by my self. Not notice the fault in the measurements...