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SV: [APML]: astrophoto questions
>yellow/orange. I will send the photo to anyone interested in giving
>comments about it.
I'd love to see that photo.
>The questions that I want to ask are:
>1. Would a faster film (1600 or greater) produce a better picture?
Normally, faster films results in more grainy photos but in the beginning I
think you can cope with that. I've seen results from a 3200 film, Konic SR
or something. It's extremely grainy but clearely shows the milkyway patches
rather good on exposures as short as 15-30 seconds. Just for fun, I'd try
and see if I could get hold of some even faster films and just experiment.
>2. If faster film, how long to make the exposure without star trails?
>(the picture taken was 20 seconds).
That question has already been answered. About 20-30 seconds at the equator
and up to a minute at the pole. If you want you can try even longer
exposures and get some pretty good results. Why not some star trails?
>3. I have a Meade 4.5" model 114EQ-D reflector and would like to hook a
>camera up to
I can't speak about prime focus photographing since I haven't tried any. I'm
just doing fixed tripod shots like you. At the moment I am building a clock
drive which will allow exposures up to about 10 minutes with a wide angle
lens.
In the beginning I considered getting into prime focus too but soon
understood that it's not very easy. You need very good and sturdy equipment
and be able to do a very accurate polar allignment. I believe very much can
be done with short lenses. Take a look at Mike Regish' homepage at
http://members.tripod.com/~mike534 for some simply but very good images of
Orion.
I don't know if it will help but if you have time, go to
http://hem1.passagen.se/astrosci/ap_start.htm
Olle Eriksson
http://hem1.passagen.se/astrosci/