Archived posting to the
Leica Users Group, 2007/10/12
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Subject: [Leica] George: 28mm Summicron IR problem
From: imagist3 at mac.com (Lottermoser George)
Date: Fri Oct 12 14:51:58 2007
References: <7FA6647D-A36C-4A86-84B3-A4756DA8FB77@comcast.net> <AD06510A-F797-4345-B9EA-89A36F6B32D4@cox.net> <38210829-413E-4B70-BCE8-8CE7E2AED6B1@comcast.net> <6677A2AF-864D-4269-9161-89C6239263B9@cox.net>
The IR "hot spot" phenomenon can be found referenced throughout the
IR literature. Some wide angle lenses (from any and all
manufacturers) display the phenomenon and others don't. The
phenomenon does not translate to Panchromatic or Color renditions
from the same lenses. I don't fully understand the light wave
length : optical formula that causes it.
Regards,
George Lottermoser
george@imagist.com
On Oct 12, 2007, at 4:39 PM, Steve Barbour wrote:
> how is the effect manifested in bw images?
In reply to:
Message from len-1 at comcast.net (Leonard Taupier) ([Leica] George: 28mm Summicron IR problem)
Message from kididdoc at cox.net (Steve Barbour) ([Leica] George: 28mm Summicron IR problem)
Message from len-1 at comcast.net (Leonard Taupier) ([Leica] George: 28mm Summicron IR problem)
Message from kididdoc at cox.net (Steve Barbour) ([Leica] George: 28mm Summicron IR problem)