Pretty severe coma for Sigma 100-400 DG DN 5-6.3

Started 11 months ago | Discussions thread
Photo Pete Veteran Member • Posts: 5,424
Re: Pretty severe coma for Sigma 100-400 DG DN 5-6.3

Do you need the full resolution of the A7Riv for your astro shots, or can you shoot at a wider focal length and crop, so as to get rid of the corners which are most degraded by coma?

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Photo Pete

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