3 lenses (3 good)

IR Focal
Length
Minimum
Aperture
Lens Filter Weight Notes Images
Good 35mm ƒ/2 Voigtländer 35 mm / 1:2.0 APO-Lanthar aspherical Z
KEH B&H
⌀49mm 352 g A truly impressive performer. No meaningful hotspots at any aperture and the visible red / IR color phasing is tighter than my other lenses, making 550nm/590nm-filtered false color much more usable when there are high contrast elements at the frame edges. -Michael Piantedosi  
Good 135mm ƒ/2.8 Leica Elmarit-M 135mm ƒ/2.8
⌀55mm 780 g No hotspot. Specs are for the later (III) version with the standard E55 filter thread; earlier versions used a Series VII filter adapter instead.  
Good 135mm ƒ/4 Leica 135mm ƒ/4 (Leitz Wetzlar Elmar 1960-1965)
KEH Adorama B&H
⌀39mm   Reported by Michael Piantedosi  

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Leica M Lens Mount Adapters

Use an adapter to mount these lenses to many mirrorless cameras.

B&H - Leica M lens mount adapters

Adorama - Leica M lens mount adapters