Hi Charlie,
I have used a simple 500/8 lens and also a 1000/10 Mirror with 100 asa slide
film to record sunspots, also using ND5 Foil filters. As far as I recall,
/250 gave decent results in both cases, but I would suggest bracketing
between /125 and /1000 anyway. There is no need to hurry, the whole thing
lasts some hours. But it will not happen again during our lifetime, so there
is no point in saving film...With the 300, the sun will be only 3mm wide on
the film, so I would suggest to go up with focal length as far as possible.
I even tried a 2x converter on the 1000mm, but mounting was not stable
enough in this case.
Good luck, I still hope for good weather..It has been bad for a long time in
our area, I was not even able to see the comet which is easily visible in
the evening sky :-(
Rainer
-----Ursprüngliche Nachricht-----
Von: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx]Im
Auftrag von Geilfuss Charles
Gesendet: Freitag, 14. Mai 2004 16:16
An: 'Olympus@xxxxxxxxxx'
Betreff: [OM] Transit of Venus/Exposure
Greetings All,
I have a question that is directed toward those on the List with
astrophotography experience. I plan to photograph the early morning (East
coast USA) solar transit of Venus that will occur on June 8th. I have
obtained two squares of Thousand Oak solar filter material (ND 5) that I
will fashion in such a way as to fit on the business end of my longest
lenses (300/500 both are 72mm) as well as my friend's 8" Meade telescope. I
will use a digital camera on the Meade (have an adaptor that will fit) as
well as the OM with slide film. My question is how best to meter with the
OM? I've read elsewhere to spot meter adjacent to the sun but I wonder if it
would not be better to meter manually and use some variation of the Sunny 16
rule. Thanks.
Charlie
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