July 2004 Alt-Photo-Process-L: Re: Question on Metal Halide

From: altprinter ^lt;dstevenbryant@mindspring.com>
Date: 07/15/04-11:47:33 AM Z
Message-id: <31725761.1089913653864.JavaMail.root@wamui02.slb.atl.earthlink.net>

Keith,

I have one but haven't set it up yet, but I think Sandy wrote in the article or somewhere that the HID is about 1/2 stop slower at the distance required to project that size circle.

Don Bryant

-----Original Message-----
From: Keith Gerling <Keith@gumphoto.com>
Sent: Jul 16, 2004 1:35 AM
To: alt-photo-process-l@sask.usask.ca
Subject: Question on Metal Halide

My ancient Violux printing lamp died on me this week. I've been looking for
a replacement and I've been reading Sandy King's excellent rundown on UV
sources at Unnlinkingeye.com. I'm interested in the HID Metal Halide and
Mercury Vapor lamps, but I'm concerned about lengthy exposures. Does
anybody here use of these? Any ideas on how long of an exposure I might
need with the bulb far enough away to cast a 40" circle of light?

Thanks

Keith
Received on Thu Jul 15 11:47:42 2004