TS-Optics PhotoLine 125mm f/7.8 FPL53 Lanthanum

[miki63au]

Hello all


Anyone bought this scope from APM?


https://www.apm-telescopes.de/en/tel...5-focuser.html


It is f7.8 and I plan to use it with a 8300 CCD. Considering it's 'slow' do I need a field flattener/corrector if I want to use it at full focal length?


I have the AP's CCDT67 to make it 'faster' but this is not a flattener. Should I get the dedicated 0.79x reducer/corrector (more $$$)?


Appreciate your comments


Regards,
Mik

[Atmos (Colin)]

That depends on how much distortion you’re willing to put up with. You can always give it a go and see if you’re happy with the level of correction but you’d be better off with a flattener.

[miki63au]

Yeah, agree. Thanks Colin!
I'll procrastinating on this a bit... very good at that

Originally Posted by Atmos

That depends on how much distortion you’re willing to put up with. You can always give it a go and see if you’re happy with the level of correction but you’d be better off with a flattener.