Re: IR color problems with M8?

Mark, Leica has never claimed that the UV/IR issue does not affect longer lenses. They recommend using them on all lenses. Further, they recommend that lenses shorter than 35mm should be 6-bit coded, whereas with 50mm and longer the coding is really optional.
I have ordered my 2 free UV/IR filters from Leica in larger sizes (46 and 60) and have ordered the two smaller sizes I need (39 and 43) from Heliopan. Just about half the price of Leica filters, and I cannot imagine that Heliopan (or B+W for that matter) would be inferior to Leica. 

Nathan

Nathan Wajsman
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On Dec 17, 2008, at 7:05 PM, Mark Bohrer wrote:
Some reviewers have said that only short lenses with focal length below 35mm have problems. That sounded a bit funny. Nathan, your all- over-the-place color with the 50mm Summilux says that ALL lenses show the problem.
This makes sense - it's the lack of IR cut in the M8's sensor, though IR transmission of the lens plays a part. 

Anyone used B+W's IR-cut filters, or any other non-Leica brand?

The B+W filters are a bit less expensive than Leica's.

And does a different camera profile make a difference?
There was an early review on luminous-landscape.com describing a fix with the P30 Flash - Easy Black Profile in Capture One Pro. Did anyone try this or another profile? 

Mark


Bob Adler wrote:

Not if you use the recommended IR filter...
Bob Adler
Palo Alto, CA
http://www.raflexions.com


------------------------------------------------------------------------
*From:* Mark Bohrer <markbohrer@xxxxxxx>
*To:* leica@xxxxxxxxxxxxx
*Sent:* Wednesday, December 17, 2008 9:39:49 AM
*Subject:* IR color problems with M8?
Has anyone had IR color problems - magenta cast with artificial fabrics, hot-pink flesh tones - using the M8 with any of these lenses? And what 
did you do to solve them?

21mm f/2.8 Elmarit-M ASPH
35mm f/2 Summicron ASPH
35mm f/2 Summicron (first version with goggles)
50mm f/1.4 Summilux (non-ASPH)
50mm f/1 Noctilux
90mm f/2.8 Tele-Elmarit (2nd version)
135mm f/3.4 APO-Telyt

25mm f/2.8 Zeiss Biogon-T*
25mm f/4 Voigtlander Color-Skopar
28mm f/2.8 Zeiss Biogon-T*
28mm f/2 Voigtlander Ultron
75mm f/2.5 Summarit
75mm f/2.5 Voigtlander Color-Heliar

The first group is lenses I own. The second group is lenses I'm
considering for an M8.

Thanks for any info.

--
Mark Bohrer
Mountain and Desert Photography
www.mountain-and-desert.com <http://www.mountain-and-desert.com/>
Wildlife on the urban edge


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Mark Bohrer, MSEE
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