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Proper "rule" for pinpoint stars with M43

Started Oct 27, 2016 | Discussions thread
Giiba
Giiba Regular Member • Posts: 414
Re: Proper "rule" for pinpoint stars with M43

I have limited experience, but have used the 8/1.8, 12/2, 15/1.7, and 17/1.8 for stars. From what I've seen it is more complicated than a simple linear formula. I maintain:

https://docs.google.com/spreadsheets/d/1-5JkMAHVcVV4zLsEH8xlxoSeuhYURLoJtuJn57N9ues/edit?usp=drive_web

to compare m4/3 lenses and found that a non-linear formula based on angular area of view (AA) seemed most acurate. Doing a regression from the few data points gave me a quadratic equation:

(-1.6*(AA*AA))+(12.7*AA)+(4.5)

I might be over thinking this but....

 Giiba's gear list:Giiba's gear list
Olympus E-M1 Olympus 40-150mm F2.8 Pro Panasonic Leica DG Summilux 15mm F1.7 ASPH Olympus 8mm F1.8 Fisheye Pro Panasonic 8-18mm F2.8-4 +1 more
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