4 replies to this topic

[vtaDan]

I use an AT72EDii with the ATFR72 flattener reducer for astrophotography. I'd like to find a 1x flattener to narrow the field of view for smaller targets. Will any flattener for a scope of similar focal ratio work or is there more to it than that? Thanks!

[B 26354]

I currently use an Explore Scientific 2-inch Field Flattener # FFEDAPO-00 with my Stellarvue SV70T 70mm f/6 scope, and it has performed flawlessly for the past six years. That flattener is no longer available, and has been replaced by ES-FF2F5/F7:

 

https://www.explores...O_q5r_iJTKgXMi-

 

https://www.bhphotov...for_f_5.html/qa

 

I would definitely give it a try.

 

[Jon Isaacs]

The TSFLAT2 is a 1x Field Flattener with a lot of backfocus.

 

https://www.teleskop...onnection-10307

 

Jon

[Phil Cowell]

The Hotech 2” SCA Self-Centering Field Flattener might be worth a look. It’ll work with F5 - F8.

Edited by Phil Cowell, 07 February 2025 - 08:25 PM.

[PeterAB]

Hi,

 

I would look for a "SKY ROVER 1x Field Flattener for 72 ED APO Telescope Astronomy Accessory for Observing M54 and M48 Interface"   from the usual overseas sources.   I have found that Sky Rover flatteners play well with Astro Tech telescopes.

 

Astronomics has been bringing in more 1x flattener for their products.   It may be worth a call to see if they have one in the works for the 72EDii.

 

I have not been happy with my TSFLAT2. 

 

Peter