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image circle
hello members i have been studying all of the latest crop of 70mm apo's and something is confusing me
why is is that if all have 2.5" focussers, how can their respective image circles vary so much?
for instance the WO star 71 f4.9 has an image circle of 45mm while the stellarvue 70mm f6 with their 0.8 fr/ff has an image circle of 27mm
what difference would it make as i have never thought about it before and now it is worrying me lol
pat
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