>>3077692>>3077690Also an extension tube between the lens and the body also decreases close focus distance, these are empty tubes without any correctional elements so the IQ is the same with closer focus. The only problem with "normal" lenses vs macro lenses is they are not corrected for field curvature. Macro lenses have flat DoF at maximum ratio while normal lenses DoF tends to curve a lot with close focus that is emphasised by the extension tube.
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