Hi William,
The camera will be on a large, very
rigid, microscope. But the magnification
might be more like 1500X. The slightest
shake can ruin things. Up to now I've
been using a special film camera and
other digital cameras with no vibrating
components. The *ist D is a new
departure and has been chosen mainly for
economic reasons. The cheapest dedicated
cameras to do what I want (~6 mp) cost
around $5000 - $6000. The microscope
itself is on an anti-vibration mount and
this helps a lot. TTL Flash will also be
useful for some things.
The film advance mechanism in the Wild
MPS camera causes vibrations that die
down in a tenth of a second or so but
this does limits the rate at which
pictures can be taken at high
magnification. Long exposures are not
practical with living specimens and mine
are alive -- often very much so.
By the way do you still have the Leitz
instrument you got from your father?
D
William Robb wrote:
----- Original Message ----- From: "Andre Langevin"
Subject: RE: Digital finally
Two seconds may not be enough for microscope shots. I've had a private
email exchange with Herb recently where he suggests that a period longer
than 2 seconds would provide sharper pictures when using very long focal
lenghts. And if I understand it right, 2000 mm is equivalent to a 40X
magnification.
Were you discussing a tripod mount or a microscope mount. It is much more
difficult to keep a tripod mounted camera vibration free than a microcope
mounted one due to the different mounting method, and because
microscopes are inherenty more stable than tripods..
William Robb
--
Dr E D F Williams
_______________________________
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Updated: Photomicro Link -- 18 05 2005
