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orion ed 110mm
I recently purchased an Orion ED 110mm APO because I miss my TAK so much !!
Anyway, the focuser is pretty good on it and is supposed to be viable up to 7kgs.
I use a Hotech field flattener with it with gives a really nice flat field with my QHY 8pro and it also worked well with the Canon 5 D.
The colour correction I am unsure of as I am getting blue fringing in long exposures with the OSC camera- I don't think narrow band would an issue.
All in all I am very happy with it so far and I don't think you would need to upgrade the focuser unless you wanted more automation.
Aesthetically it pleases though I am no APOD candidate so a good buy (for me)!.
Cheers
Graham
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