Archived posting to the Leica Users Group, 2006/12/20

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Subject: [Leica] IMG: Another Comparison
From: red735i at earthlink.net (Frank Filippone)
Date: Wed Dec 20 07:27:55 2006

Me again.....

Obviously these were taken at different times, no tripods, no time to check 
the focus, so the comparison is not scientific, and
there are different lenses used which makes scientific comparisons really 
tough.....however,,,,,

The flag fringe on the Leica shot is more in focus than the Canon shot..... 
telling us the focus on the Leica shot is maybe more
wrong.  At the distances you were shooting... maybe 10-15, feet your DOF is 
pretty slim.   The focus and area of sharp focus of the
Leica fringe looks pretty good. The Bokeh of the Leica lens could account 
for the round ( vs pointy topped ) flames.  Also you must
suspect the RF of the M8 as a problem source.... your eye had it focused 
right, but the shot is wrong.  Is the camera RF properly in
calibration for focus?  This is a pretty severe test for your RF.

The Canon shows more vibrant color.  The Leica shot is washed out by 
comparison.  The red flag (?) in the background is obviously a
different hue, but it is all over less vibrant on the Leica side. That is 
worrying.

The Canon hand and candle has a lot more detail.  ( Focus better?  Less 
flare? .)  This looks like an optical issue to me....  Let
me ask.... if you were to put this specific Leica lens on a M(not)8, what is 
this particular lens like?  Nice and contrasty?
Flarey?  ( Heavens no, ) Soft?  Have you had this lens recently cleaned?  
What do the out of focus areas look like?  If you used
film in a similar setting, what would you expect?

In the candle flame I see what looks like some optical issues.... dirty 
lens?  Not properly collimated?  Severe flare?  Out of focus
Bokeh?

I also see color fringing.  This is the magenta halos around the white light.

If it were me, I would suspect the lens and focus first in this case... do 
you have any shots taken at the same time and lighting
with a different Leica lens for comparison?  Any better focused examples?  
Try to eliminate the fixable lens faults ( out of focus,
hand movement, etc.)  as the culprit first.

To do this right, why not actually set this up in a studio setting and make 
the variables go away?  Tripod, plenty of time, soft
music, single candle, etc.  

You are driving yourself nuts trying to learn to use the M8 on the job and 
evaluating those results as if it were a scientific test.
Give the a chance cameras to do their best.. it will take a few hours, but 
it might save you  a lot of angst.....

Bottom line?  The colors are somehow more washed out on the Leica shot and 
the test was not scientifically valid enough to figure
out what is happening with the candle flame.  Reshoot with variables reduced.

Frank Filippone
red735i@earthlink.net 




Replies: Reply from images at InfoAve.Net (Tina Manley) ([Leica] IMG: Another Comparison)
Reply from vondauster at earthlink.net (Will von Dauster) ([Leica] IMG: Another Comparison)
In reply to: Message from images at InfoAve.Net (Tina Manley) ([Leica] IMG: Another Comparison)