Leica M8x with uncoded lens

[snits]

Hi, i'm thinking of getting a pre-owned and shoot with uncoded lenses for eg 50, what's the impact using uncoded lens on m8? I would probably get a UV/IR for it, but is it really necessary? pls advice, thanks.

 

[gommy]

UV/IR filter is used to correct for infra-red contamination resulting in magenta cast of some black object . Use of UV/IR filter introduces a new problem- wideangle lenses (35mm & wider) develops cyan shift at the corners(cyan vignetting). The extent & amount varies with the lens used. That's where coding comes in. With coded lenes, the firmware is able to know what lens is used & introduce the correct amount of correction for the cyan shift.
However, for longer lenses, the cyan shifting is insignificant so coded lenses not necessary unless you also want to have focal length encoded in exif data.

 

[snits]

UV/IR filter is used to correct for infra-red contamination resulting in magenta cast of some black object . Use of UV/IR filter introduces a new problem- wideangle lenses (35mm & wider) develops cyan shift at the corners(cyan vignetting). The extent & amount varies with the lens used. That's where coding comes in. With coded lenes, the firmware is able to know what lens is used & introduce the correct amount of correction for the cyan shift.
However, for longer lenses, the cyan shifting is insignificant so coded lenses not necessary unless you also want to have focal length encoded in exif data.

thanks, I assume 50mm 'cron uncoded works fine?

 

[paisatge]

thanks, I assume 50mm 'cron uncoded works fine?

50mm definitely works fine uncoded. Just make sure you use a UV/IR filter

 

[lokewl]

From the photo below, the bag is actually black in colour but without a UV/IR cut filter attached, the bag below magenta instead.

 

[third3rdwheel]

UV/IR filter is used to correct for infra-red contamination resulting in magenta cast of some black object . Use of UV/IR filter introduces a new problem- wideangle lenses (35mm & wider) develops cyan shift at the corners(cyan vignetting). The extent & amount varies with the lens used. That's where coding comes in. With coded lenes, the firmware is able to know what lens is used & introduce the correct amount of correction for the cyan shift.
However, for longer lenses, the cyan shifting is insignificant so coded lenses not necessary unless you also want to have focal length encoded in exif data.

Gommy,

You sure know your stuff. Learnt something here for sure. Thanks.:cheers:

 

[third3rdwheel]

From the photo below, the bag is actually black in colour but without a UV/IR cut filter attached, the bag below magenta instead.

Very useful illustration. Cheers.

 

[gommy]

Gommy,

You sure know your stuff. Learnt something here for sure. Thanks.:cheers:

Hehehe...I came from the era where there's no UV/IR filters, so have been following development of the issue. Actually, in the beginning I was very encouraged by the 'generosity' of a lot of Leica M8 users worldwide- alot of them contributed time & ideas in helping each other solve these problems. If you go to Leica Users forum & search in the earlier threads, they were a lot of profiles developed for the various lenses in the various software for IR issues-without UV/IR filters, without codings etc.
However, I have not tried any of them.