I'm thinking of dipping my toes into CaK imaging using a Lunt CaK diagonal. One of the telescopes used would be my Celestron 90/660 mm achromat, without an additional ERF. It has a few internal baffles (blackened) - should I be concerned?
- when pointing the 'frac at the solar limb, the light cone could be hitting the baffles on the opposite side
- even without that, the baffles will just heat up and cause tube currents (it's a closed OTA)
I thought I could maybe whiten their front-facing sides (but won't it decrease contrast for non-solar uses?), or just remove them and flock the inside of the OTA (I still have some black velour) - though this could be again heating up from indirect illumination...
Lunt CaK module vs. refractor baffles
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GreatAttractor
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Lunt CaK module vs. refractor baffles
My software:
Stackistry — an open-source cross-platform image stacker
ImPPG — stack post-processing and animation alignment
My images
SW Mak-Cass 127, ATM Hα scope (D=90 mm, LS50 etalon), Lunt LS50THa, ATM SSM, ATM Newt 300/1500 mm, PGR Chameleon 3 mono (ICX445)
Stackistry — an open-source cross-platform image stacker
ImPPG — stack post-processing and animation alignment
My images
SW Mak-Cass 127, ATM Hα scope (D=90 mm, LS50 etalon), Lunt LS50THa, ATM SSM, ATM Newt 300/1500 mm, PGR Chameleon 3 mono (ICX445)