Re: [APML] Copygraph finished and hypering Q

["John C. Mirtle" <jmirtle@shaw.ca>]

Brian,
    Hypering does not increase speed, it just stops film from slowing down
under exposure to faint light. You probably have good density on the moon at
4 seconds. I would have gone for 1/250 to 1/1000 at f4.5 - but that's just
me. I don't have any good moon pictures....

Is the moon back again already??

John Mirtle
Calgary, Ab. Canada

----- Original Message -----
From: "Brian Larmay" <astrobri@ameritech.net>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Monday, March 10, 2003 9:56 PM
Subject: Re: [APML] Copygraph finished and hypering Q


Thanks Clay,

I tried it out on the moon tonight but I think I overexposed the tech pan
and Im not about to waste my HC-110
The shutter was open for about 4 secs.
I forgot how to determine the focal length though...this was mentioned to me
awhile back but I cant find the exact post in the archives.
It says 280mm f 1:4.5

Can you determine the correct exposure?
Im almost positive the TP is rated 125, but what about considering the
hypersensitization.
Hypering ups the speed right?

Thanks Brian


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