I'm moving up to 4x5 and have read things about the need for special lenses for close-ups, especially apochromatic lenses. Why is this, and are there other pro blems associated with photographing close-ups in large format? Are such lenses expected for commercial/editorial photography?
By the way, I shot my first large-format photos today. It was pretty easy, alth ough focusing takes longer than with my N90s.
Thanks.
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