How do you code your 35/1.4 pre-asph?

[lct]

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How do you code your Summilux 35/1.4 pre-asph for use with M8 or M9, if any? Thanks for advice.

[2eleven]

How do you code your Summilux 35/1.4 pre-asph for use with M8 or M9, if any? Thanks for advice.

 

There is no official 6-bit code for this lens, but I believe the closest one optically is the pre-asph 35/2 (000110). Alternately, you can update your DNGs with the official code (as can be selected from the M9 menu) using exiftool. See this post:

 

http://www.l-camera-forum.com/leica-forum/digital-post-processing-forum/135236-changing-lens-info-exif.html#post1412243

 

Hope that helps,

 

John

[01af]

There is no official 6-bit code for this lens ...

There is—it's 6-0.

 

However due to the null frameline code, you cannot apply this code to the lens' bayonet flange; you have to select it manually from the M9's lens menu. Or actually, you can apply the 6-bit lens code 6 (000110) to the bayonet flange but then the camera will think it's a Summicron-M 35 mm 1:2. As an alternative, you may try the 6-bit lens code 29 (011101) which belongs to the Summilux-M 35 mm 1:1.4 Asph.

 

Whatever you do—there is no way to make the M8/M9 cameras properly recognise the spherical Summilux-M 35 mm 1:1.4 automatically. Your options are:

 

• leave the lens uncoded and unrecognised, or
  
• select the proper item from the M9's lens menu manually, or
  
• have the lens 6-bit-coded as a similar model, like Summilux-M 35 mm Asph or Summicron-M 35 mm.
  

[2eleven]

There is—it's 6-0.

 

That's actually an 8 bit code (with the null frameline bits). What I meant is that there is no official 6 bit code for the lens bayonet which will work with the actual lens frameline selection (which you explain quite well). My understanding is that the optical design of the spherical 35 cron is the closest match if you want to code the lens and have the most accurate corrections applied. The 6 bits of the Summicron bayonet code also match the ones Leica chose for the official 6-0 code you mention above, which may indicate that Leica also felt this way.

 

By the way, thanks for your post on the exiftool usage. I've made good use of it on more than one occasion.

 

John

[pico]

Set it to Manual and 35 f/1.4 11869/11870/11860

 

It works for me.

[lct]

...have the lens 6-bit-coded as a similar model, like Summilux-M 35 mm Asph or Summicron-M 35 mm.

Yes thank you Olaf that is what i thought as well but i hesitate between those two codings. Did you try the 35/1.4 asph code with the pre-asph lens?

[thompsonkirk]

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As Pico said, 'Set it to Manual and 35 f/1.4 11869/11870/11860.' Then make a User Profile so you can set it quickly whenever you mount this lens.

 

Kirk

[lct]

Thank you Kirk but i plan to code the lens itself for use with the M8 as well. Did you try the 35/1.4 asph coding with the pre-asph Summilux?

[stunsworth]

I didn't bother, as far as I could tell there were no visible problems.

[rickp13]

Thank you Kirk but i plan to code the lens itself for use with the M8 as well. Did you try the 35/1.4 asph coding with the pre-asph Summilux?

 

i used this code with two pre-asph summilux lenses without problem. the flange was modified by a camera technician in the netherlands.

 

good luck

 

rick

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[lct]

011101 is the 35/1.4 asph coding thank you Rick. Would you recall the details of your technician by chance?

[DanYack]

Hello,

a long time after the battle but I manually coded the same lens with the Summicron 35 f2 (IV) code = 000XX0 (6) and when you push the info button it says 35 f/1.4.

 

Looks like the proper code.

[algrove]

i used this code with two pre-asph summilux lenses without problem. the flange was modified by a camera technician in the netherlands.

 

good luck

 

rick

 

Rick-That looks lovely. To bad Leica refused to code mine when I sent it in for a recalibration and a check-up.

[01af]

... I manually coded the same lens with the Summicron 35 f2 (IV) code = 000XX0 (6) and when you push the info button it says 35 f/1.4.

Impossible—except when you also manually selected the 35/1.4 option in the lens menu. When lens recognition is set to Automatic, however, then the camera will think it's a 35/2.

[2eleven]

Impossible—except when you also manually selected the 35/1.4 option in the lens menu. When lens recognition is set to Automatic, however, then the camera will think it's a 35/2.

Olaf is correct.

 

Despite this, the 35/2 pre-asph is probably still the best code to use for this lens. Based on my own research a few years ago and comparisons of falloff patterns easily found today, the 35/2 pre-asph code is a better match for this lens than the 35/1.4 asph code.

 

John

[horosu]

Hello all,

 

Now that the manual selection of the 35/1.4 pre-asph from the M240 menu is gone, how do you guys select a code for this lens on the M10?

 

Kind regards, Horea