Re: 8" Lx200 Photography
| Subject: | Re: 8" Lx200 Photography |
| From: | Gerry Reynolds |
| Date: | Tue Apr 30 13:50:02 1996 |
>Hello. I have a 8" F6.3 Lx200 and I want to get into some lunar and deep
>space photography with it. I have the hardware but my questions are what
>would be some good exposure times for perhaps the
>Moon, I figure about 1/30 sec.
>M51
>etc. I will be photographing many of the Ursa Major M Objects as well as
>some Ic objects. I am not really concerned with getting first rate pics I
>just want some experience. Keep in mind I live on the east coast and my
>observing site is dark but not compared to other standards. I do not have a
>Off Axis Guider and dont really want to get that far into Astrophotography
>to get one yet.
>
>Thanks
>Brant
>
Brant, I have a 10" f6.3 and I can give you the exposures I use on various
objects that I think would be good for your scope given that it is also an
f6.3. I use Ektachrome 1600 and get excellant results. You will want to
adjust your exposure times for other ASA ratings (ie 4x exposure for asa 400)
Galaxies - 30 minutes
Open clusters - 10 minutes
Orion nebula - 6 minutes
Horsehead - 30 minutes
Planatary neb - 15 to 20 minutes
These seem to give a good 1st attempt exposure and sometimes you may want to
adjust given relative brightness. For me, maybe 1 in 7 pictures will want to
have an adjustment on 1st time exposure. I have no experience with moon,
planets, or globulars yet. Hope this helps.
Gerry Reynolds
gerry@fc.hp.com
