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Square or circular?

Moravian Instruments C3-61000 PRO Filters Vignetting
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Riccardo Civati avatar
Riccardo Civati avatar
Hi all

Is true that Moravian C3-61000 Pro needs Square 50x50 filters because with circular filters there Is vignetting?

Riccardo
andrea tasselli avatar
andrea tasselli avatar
It depends on configuration, camera + optical system ahead of camera.
Riccardo Civati avatar
Riccardo Civati avatar
TEC 140 ED with flattener 1x f/7.
andrea tasselli avatar
andrea tasselli avatar
Internal or external FW?
andrea tasselli avatar
andrea tasselli avatar
Either way, 50mm unmounted, round. You might get away with 2" mounted with the internal FW, by a very slim margin though. I wouldn't bank on it, however.
Dark Matters Astrophotography avatar
Dark Matters Astrophotography avatar
With your TEC140 you should be able to use 50mm round filters. If you were to upgrade to a different OTA in the future or to a larger sensor the square filters would be required. If you think that may be a possibility it could make sense to go to the 50mm square filters now.
Well Written Concise
Daniel Carter avatar
Daniel Carter avatar
Riccardo Civati:
Hi all

Is true that Moravian C3-61000 Pro needs Square 50x50 filters because with circular filters there Is vignetting?

Riccardo

I'm using the C3-61000 camera on a 12.5" iDK at f/6.8 and I have the 50mm round filters. They work fine with no vignetting. Like Bill mentioned, if you plan on going with a bigger sensor in the future, the 50x50mm filters would make sense.
Well Written Concise
Bob Lockwood avatar
Bob Lockwood avatar
I use 50x50mm on my C3-61000 because I already had them. If the price difference is not an issue, I'd just go with the 50x50mm.
Riccardo Civati avatar
Riccardo Civati avatar
Daniel Carter:
Riccardo Civati:
Hi all

Is true that Moravian C3-61000 Pro needs Square 50x50 filters because with circular filters there Is vignetting?

Riccardo

I'm using the C3-61000 camera on a 12.5" iDK at f/6.8 and I have the 50mm round filters. They work fine with no vignetting. Like Bill mentioned, if you plan on going with a bigger sensor in the future, the 50x50mm filters would make sense.

***Hi Daniel
can you send me your master flat frames stretchd ( all filters)?***
riccardo
Daniel Carter avatar
Daniel Carter avatar
Riccardo Civati:
Daniel Carter:
Riccardo Civati:
Hi all

Is true that Moravian C3-61000 Pro needs Square 50x50 filters because with circular filters there Is vignetting?

Riccardo

I'm using the C3-61000 camera on a 12.5" iDK at f/6.8 and I have the 50mm round filters. They work fine with no vignetting. Like Bill mentioned, if you plan on going with a bigger sensor in the future, the 50x50mm filters would make sense.

***Hi Daniel
can you send me your master flat frames stretchd ( all filters)?***
riccardo

I'll get them to you via private messaging later today or tomorrow morning.
Well Written