Quote:
Originally Posted by Chris
I did use the CinC DOF on-line calculator (chart provided with Nikkor 80-400 VR a bit small to read at 400mm end) and was rather shocked by the results for 400mm at minimum (2.3M) range, ................. I am also a bit frustrated over getting the sensor clean on D80, so less keen on dozens of lens changes.
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No need to bother then Chris ?
As for dust on the sensor then it may be down to the speed of operation of the zoom ring giving a pump action to disturb any dust in the mirror box.
I have only one zoom 12-24, all other lenses being fixed focal. Necessarily I do lots of lens changes, and dust has not been a significant problem. Only ever used a Rocket Blower.
Relative to Tannins dust experience I do not live in a hostile environment. Avoid lens changing on a dusty steam rally field.
Don