6 BIT FOR ZEISS or CV LENSES????

[bluepenguin]

If you have non-leica lens. Try to put color with your Black marker same as Leica lens.

Your M8 will recognize it.

Of course after some time you have to put market again, but it works.

Why you have to pay more????

 

[boilerdoc2]

The coding only serves to ID the lens to the M8. The camera software applies a correction for vignetting. Obviously this is only important for wide lenses and the Noctilux. Until the new 1.1 firmware is out there is NO correction for the cyan fringing with the IR filters. There is a lot of pressure for Leica to add a manual selection of what lens is on the camera, mainly because not all Leica lenses can be coded, e.g. the 35/1.4 early version. Stay tuned, i think it'll happen.
Steve

 

[HAnkg]

Well, Leica seems a bit reluctant to provide users with the option of manual selection of lens profile via the menu. I put up a petition yesterday (183 signatures since yesterday) to impress upon them that this is a priority for users:

"The undersigned M8 users respectfully request that Leica include an option for user selectable lens profiles via the menu as soon as is possible."

Sign here:

http://www.petitiononline.com/M8menu/petition.html

Your email will remain private, even from me. Might be a good idea to put your country in the comments field.

 

[Lemures-Ex]

I havn't been following the M8 problems too closely, but from what I already know and what I read in this thread, why could Leica not simply fix the IR problem with the sensor and be done with all of this coding and filter crap? The IR sensitivity is the root of the problem correct?

Jared

 

[HAnkg]

If it was an option they would have done it. The problem is unlike SLR's, the close proximity of the lens rear element to the sensor in the M means light hitting the edges of the sensor is at an extreme angle. Wideangles would be unusable with a stronger IR filter at the sensor rather then in front of the lens, as the cyan drift would be off the charts. There where also other image quality issues with a thicker filter.

They are at the limits now of microlens and filter technology for RF applications. Maybe things will change a few years down the road.

 

[glenerrolrd]

Since it apperas that leica solution to the magenta /WB issues will require the firmware to identify the lens, will this make it more difficult to use zeiss or CV alternatives on the M8? Forgetting the cost differences it appears that Zeiss will have 15 and 18 primes and Cv has of course the 12 and 15 . The only leica offering will be the new 16-18-21 tri elmar. Has anybody been thinking about copying the 6bit configuration for the tri elmar for use with zeiss/cv lenses. Other than possible tightness of the lens mounting , it sure looks like a thin tape solution would work for a lot of users? Just fishing for possible in progress solutions.

This problem has been partially solved by hand coding Zeiss and CV lens with existing Leica codes .....there have been a number of threads on this here an on the LUF. Solutions have evolved from "proof of concept" using Sharpes to more permanent solutions with machined adapters/base plates etc.

 

[Richard Marks]

Im not sure how many people have loaded up the new firmware, but it does have a menu where you can tell it whether or not there is an IR filter in place. Presumably it will only make corrections for this if it already knows which lens is mounted from coding. It is a subtle pressure to get coded, but even setting cost issues aside, I really would not want to loose my non coded lenses for an indefinate period of time.

I think genrally speaking, Leica have been very short on information regarding what they are doing with each upgrade. Also they are removing the previous versions from their web when the new one is posted. This means that if one does not like the upgrade there is no going back unless you keep a copy of the previous version on your PC. I am certainly going to do this from now on.

 

[DaveB]

Am I correct in understanding that the 6-bit coding allows the software to correct for vignetting in camera?

Is there anyway to apply a correction for various lenses at the point of raw conversion?

I've always been a little fuzzy on this point.

 

[Terao]

Rather than just paint on the lens surely the solution is to add a thin piece/ring of acetate with the correct coding applied? It is just an optical solution isn't it? Would cost pennies to produce, make them yourself on any printer or buy a complete set of them from HK for 5 bucks? Would give you an approximate correction solution for 3rd party lenses. Alternatively you could spend time working out which of the codings worked for which Zeiss or Voigtlander lens. Simple enough "open source" project I would think.