Curious about 6-bit coding on a Noctilux 1.0

[msbel]

What is the advantage of 6-bit coding a Noctilux 1.0 in actual image taking? I know there are advantages with 35mm and wider lenses for vingetting correction, etc., but always wondered what the effect would be on a 50mm Noctilux, if any....

 

[kbg32]

Not much. The use of coding and UV/IR filter will only help render black as black. Not magenta. It will do nothing for the corners.

 

[kin]

If you code the Noctilux and use the updated M8 firmware, then the autoiso function will work properly. Without the coding you will have to manually set the minimum shutter speed before the iso increases automatically.

It's a pain to use the autoiso function and change between 6bit and non-6bit lenses otherwise. I keep forgetting to make the manual changes.

 

[jaapv]

What is the advantage of 6-bit coding a Noctilux 1.0 in actual image taking? I know there are advantages with 35mm and wider lenses for vingetting correction, etc., but always wondered what the effect would be on a 50mm Noctilux, if any....

Yes- there are advantages if one codes a lens. Mostly it is not very important for 50 mm and longer, but the Noctilux is a case apart. Obviously it does the finetuning of the IR correction by the filter, but it will also correct the optical vignetting of the lens. The Noctilux is the longest focal length lens where that makes sense.

 

[msbel]

Got it. Thanks guys...guess it goes to the coding farm in NJ. I had a hunch the Nocti may be different than other 50's in that regard. I just don't want to mess with this delicate baby unless really necessary.

 

[kenn]

DIY Coding the Noctilux-M 50mm f/1

DIY Coding the Noctilux-M 50mm f/1

Of all the M series, the Noct is the * easiest * to code yourself, especically with the D-Coder kit. The code for this lens is "5 in a row" bits (black) from left to right with one negative (white or blank) at the end. Takes 1 minute with a black sharpie and you can try it out for yourself. Works great for me. The kit URL is below, useful for any of the non-coded lens, almost not required for this one.

http://matchtechnical.com/coderkit.aspx