SB-N5 problem?

vkyr2 wrote:

The lowest distance was meant more in relation to the previously shown source of aperture + ISO reach table.

You've shot f1.8 with the 18,5mm lens, f1.8 isn't handled at all by that shown reach table and I believe the lens wasn't available that time when the table might have been published. Also that table for sure just gives some possible clues for a SB-N5 and so may not cover it's full spectrum.

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Valentino