Archived posting to the Leica Users Group, 1997/03/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Don, Thanks for the advice. But the problem is that Comet Hale-Bopp does not have a very long tail (10 - 20 degrees from a dark sky). Using a 35 or 50 mm lens will only show a small blob of the comet in the frame. Last year I took some pictures of Comet Hyakutake with my 35mm Summicron. That comet had a 60 plus degree tail which filled the 35mm frame very nicely. I got some good shots with 1 minute exposure at f2 on Kodak Gold 400. There was no star trailing. However, the 35mm Summicron showed some vignetting and some coma near the edges (very easy to tell when photographing stars). But considering a wide angle lens at f2, I am generally quite pleased with the results. Michael >---------- >From: db[SMTP:boise@compuserve.com] >Sent: Friday, March 14, 1997 6:01 PM >To: INTERNET:leica-users@mejac.palo-alto.ca.us >Subject: RE: Astrophotography > >>>I took some pictures of the comet a few days ago with my M6 and 90/2.8 >mounted on a stationary tripod. The comet fills the 90mm frame quite >nicely and I took a roll of Fuji Super G 800 with exposures from 10 >seconds to 1 minute, all wide open at f2.8. I just got my negatives >back >and the results are rather disappointing. Stars start to trail for all >exposures longer than 15 seconds and the negative is too thin for the >exposures below 15 seconds. The proper exposure is in the neighborhood >of 40 - 60 seconds.<< > >Use a 35 or 50mm lens instead of the 90 and use it wide open. A 35 >will >allow exposures of 30 to 45 seconds without significant trailing. A 50 >will allow about 30 seconds. With Fuji 800 this should be plenty long >to >get a good exposure. Be sure to shoot from a dark sky site. > >Don >