Quote:
Originally Posted by Zuts
Hi,
I have an Esprit 120 (3.4 inch focuser), with the supplied flattener it claims it can produce a 43mm round corrected circle of light.
Is this 1mm difference going to present any issues for a full frame camera on the Esprit 120?
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I also have the ESPRIT 120ED but with a moonlite focuser.
I now doubt claims by manufacturers unless it’s someone like astro-physics, tak etc.
I have a QHY600M PH with QHY filter wheel & 50mm chroma filters
I two issues. I don’t think it’s that flat but I don’t know how the skywatcher claims compare with others but if I was to buy another OTA today, I’d err on the quality end of the market (which is almost impossible to get with someone like a stro-physics )
2nd issue is a strange reflection I never saw with a 4/3 sensor (ie ASI1600MM)
also, I needed a special fitting made to give me the 75mm spacing from the back of the flattener to the sensor (ie. the correct backfocus)