Relation between dust and aperture setting

Started 9 months ago | Questions thread
michaeladawson
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Re: Relation between dust and aperture setting
In reply to soloryb, 9 months ago

soloryb wrote:

What you are experiencing is exactly why Nikon recommends that you keep the aperture below f/16 for the D800. That dust is there - whether or not it is observable at the wider apertures. As far as I know, this dust becomes more visible due to the increased diffraction occurring at f/16 and above. Lower resolution sensors don't show this but a 36-MP sensor will.

Diffraction?  No.  You will see dust spots on a 6 MP camera and a 36 MP camera just as easily.  For small apertures the incoming light is coming almost all perpendicular from a small opening.  Wide apertures and the light is coming from all angles.

Similar to what someone else said...  stand a person near a wall. Shine a flashlight at them, look at the well defined shadow on the wall.  Now use a big wide light source if you can find one.  The wider the light source the less distinct the shadow becomes.

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Mike Dawson

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