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Showing results for tags 'Astigmatism'.
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Hi, is the 21 SEM supposed to have a high level of astigmatism? I took a few night pictures yesterday and all the small lights have a (sagittal?) tail attached to it across the frame (see attached, M10, f3.4 wide open). I'm quite surprised at this as my copy is otherwise edge-to-edge sharp and renders amazingly during the day, just shockingly unusable during the night - even when stopped down a bit, which is a bit disappointing for this highly corrected ASPH. lens. If this is the norm, would anyone be able to suggest a wide angle lens (<28mm) with relatively less astigmatism? Thanks.
