I killed two birds with one trip up the hill
in -12C. I decided to test the Sigma 400/5.6
Apo EX on the *ist D and also test how well
things work in the cold. I took a pair of
lithium batteries in my pocket in case the
NiMH, that have been in the camera a couple of
weeks, stopped working. They didn't. Everything
went well and the results are in a gallery
that I'll post in a few minutes.
Here:
http://www.kolumbus.fi/mimosa/400TEST
There are twelve images:
(1), (2) and (3) were taken from my bedroom
window
through three sheets of quite dirty glass
about 3 mm thick at an angle of about 60
degrees to normal. The total thickness,
including airspace, is about 80 mm.
Front of lens was 100 mm from the glass.
(4) and (5) top of the hill (4) with no
sharpening but a little change in levels, (5)
with a 50% application of unsharp mask.
(6) and (7) same treatment.
(8) and (9) same picture with and without the
bright spots caused by snow crystals
reflecting sunlight. They were removed with
the Polaroid dust removal plug-in.
(10) not spot removal
(11) no sharpening (12) with 50% usm.
The batteries still show full up on the
indicator and the camera took pictures even
though it was pretty cold to touch. I used
the monstrous Manfrotto for this job and it
stuck to my hand at the top of the hill when
I took off my gloves to screw the lens to the
platform. The camera is warming nicely and I
took the images out while it was still well
below zero.
Any helpful comments would be appreciated.
Don
--
Dr E D F Williams
__________________________________
http://www.kolumbus.fi/mimosa/index.htm
http://personal.inet.fi/cool/don.williams
See feature: The Cement Company from Hell
Updated: Added Print Gallery - 16 11 2005
