Archived posting to the Leica Users Group, 2007/04/17

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Subject: [Leica] IMG some M8 filter comparisons
From: davison_m at msn.com (MARK DAVISON)
Date: Tue Apr 17 20:44:44 2007

Now that I've got my color cleaned up I've looked at some experiments with 
the M8 with and without filters.  My private reason for pursuing this is 
that I've got some lenses I would like to use without filters, and I'd like 
to know when I can do that without any problem.

The first example is an acryclic hat under a mix of tungsten and daylight. 
The color of the hat is my son's school colors, so there are situations 
where you need to get them right! In this example the color shift is very 
noticeable, and I think I'll have to always use a filter.
http://gallery.leica-users.org/v/MarkEDavison/M8infrared/L1000655+acrylic+hat+filt+WB+napkin.jpg.html

http://tinyurl.com/2jtqgg

http://gallery.leica-users.org/v/MarkEDavison/M8infrared/L1000656+acrylic+hat+no+filt+WB+napkin.jpg.html

http://tinyurl.com/2k4378


The second example is green foliage under daylight.  Here the color shift is 
subtle, but discernible.  What is acutally lush, green new foliage turns 
slightly tawny (too yellow).  My conclusion is that I will have to use 
filters for landscape shots with lots of green foliage.

http://gallery.leica-users.org/v/MarkEDavison/M8infrared/L1000648+sRGB+scrn+WB+card+w+UV+IR+filt.jpg.html

http://tinyurl.com/33lcy4

http://gallery.leica-users.org/v/MarkEDavison/M8infrared/L1000649+sRGB+scrn+WB+card+no+UV+IR+filt.jpg.html

http://tinyurl.com/2tq7nl

Although these examples are in sRGB, you will have to profile your monitor 
and carefully load the profile (on Windows!) if you want to see the shifts 
that I am seeing.

Mark Davison



Replies: Reply from davison_m at msn.com (MARK DAVISON) ([Leica] IMG M8 filter comparison: synthetics in cloudy daylight)
In reply to: Message from davison_m at msn.com (MARK DAVISON) ([Leica] IMG some M8 color studies with B+W 486 filter)