In a message dated 5/28/04 1:04:13 PM, mystars@ephemeris.com writes:
The mirror lockup on a Hasselblad is manual. Combine that with a
cable release that you can lock in place and you're all set.
If you're using older Hasselblad lenses, it is worthwhile sending them
to Hasselblad to get overhauled. They'll replace the shutter springs
and fix any other problems, including making sure the lens alighment
is still dead on. If you're not getting sharp stars at infinity,
the lens might need realignment. The last time I had Hasselblad overhaul
a lens (150mm for a 500CM) it cost under $100, but that was about 5 years
ago.
Also, the Hasselblad technician that rebuilt that lens told me to
store Hasselblad lenses pointing up so any oil from the shutter
mechanism wouldn't flow towards the front of the lens. (That was
for long-term lens storage.) I never did that before then though,
and don't think there was ever a problem.
Has anyone tried using the opening in the 120 film backs for
hypersensitizing?
Paul
Paul:
All well and good but..........if he doesn't already own a Hasselblad system and he wants to do astrophotography, either piggy back or prime focus, the Pentax 67 system would be a better choice from all standpoints.
Concerning your question about the 'hole in the 120 backs' and hypersensitizing, you are referring to the oldest type of Hasselblad 120 back, where you read the frame numbers from the paper backing through a hole in the center of the back. Sure there might be a way to introduce dry nitrogen into the back through the hole to keep hypered film dry and oxygen free, but it would probably compromise film flatness. You wouldn't be hypersensitizing the film in the back.
Kent Kirkley
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