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Probably better off with the 2" 42mm. About the same TFOV but greater AFOV. I've only used the 30mm. It's good in f/8 or slower. Still okay at f/6, and even in f/5 if you must a widefield and cannot afford to spend $100s on something better. You will have to put up with lots of seagulls though at f/6 and faster.
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