Julian,
This is the best argument against the 20/2.8, except for the last
paragraph... ;-)
I'll probably order the 20-35/3.5-4.5 tomorrow.
Thank you very much.
Pierre
At 21:00 3/4/2001 -0500, you wrote:
>Hi Pierre,
>
>At close focussing distances, DOF is quite shallow. For a 20mm lens
>focussed to 25cm (9.8 inches), DOF for f/16 is from 0.20m (7.9 inches)
>to 0.33 (13 inches).
>
>So, if you focus your non-tilting 20mm lens at its closest focus, you
>will NEVER get the flower AND the mountain in sharp focus!
>
>If you want that mountain and the flower to be sharp, the hyperfocal
>method suggests focussing the 20mm lens to one meter, and
>putting camera 50cm from the flower.
>
>Close focussing of one meter is within the capabilities of both the
>20-35 zoom and the 20/2.8
>
>Or you could get the Nikon "Fun" 20mm f/8 which has fixed focus at
>its hyperfocal distance (2m), with a DOF from 1m to infinity.
>
>Cheers
>Julian Loke
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