TS-Optics PhotoLine 125mm f/7.8 FPL53 Lanthanum

[miki63au]

Hello all :hi:


Anyone bought this scope from APM?


https://www.apm-telescopes.de/en/telescopes/refracting-telescopes-ota/apochromates/ts-optics/ts-optics-photoline-125mm-f-7.8-fpl53-lanthanum-apo-2.5-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 :thumbsup:


Regards,
Mik

[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.

[miki63au]

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