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Which flat-field refractor for astrophotography?

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#1 P_Nut

P_Nut

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Posted 04 July 2020 - 10:08 AM

Hi,

 

I am now using ASI 1600MM camera and am looking to buy a refractor to go with it, around 500mm focal length. You are all familiar with the camera sensor size so you know that I do not need huge flat field. My budget is around 1600-1700 EUR and am located in Europe so TelescopeService is the prefered vendor.

 

My choices for now are these:

1) https://www.teleskop...o-Teleskop.html

2) https://www.teleskop...ularauszug.html + field flattener

3) https://www.teleskop...nung-F-4-5.html available Sept 1st.

 

What would you choose for my camera? They all seem fine, the Photoline 115mm is biggest but the glass of lower quality, 94EDPH seem to be of highest quality. The prices all combine to around my price range.

 

Thank you for your opinions.


Edited by P_Nut, 04 July 2020 - 10:09 AM.


#2 jerahian

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Posted 04 July 2020 - 11:00 AM

I would choose #1, the 102mm.  It will be a nice fast, internally-corrected scope with a good, balanced FOV.



#3 P_Nut

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Posted 06 July 2020 - 03:10 AM

I would choose #1, the 102mm.  It will be a nice fast, internally-corrected scope with a good, balanced FOV.

I don't think it's internally corrected, it has a 3 element corrector at the focuser.




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