Leica M and M39

Reviews

Adapters for Sony E-mount cameras

There are adapters for other mirrorless systems but most often  it doesn’t make much sense to use M-mount lenses on these smaller sensors if you ask me.

Cheap adapters* usually work well enough but the expensive Novoflex adapters* have lower tolerances, better materials and fit a bit tighter.

A very interesting adapter is the Voigtlander VMclose focus adapter* which works as a variable space and reduces the usually quite high close focusing distance of your Leica M lenses.

*= affiliate link

Issues

Most rangefinder lenses do not perform as well on a digital camera as on film. For a very geeky analysis check out this lensrentals.com article.
The most important factor is the filter stack thickness in front of the sensor. Leica has minimized the thickness of this sensor so that most lenses perform fine on the Leica M9 or M240. Sony uses a much thicker sensor stack with all their a7 series cameras but it can be replaced by a thin one and then the cameras perform as well as the Leicas. For a well done comparison check out Ron Schefflers site.

In short there are three issues:

  • Corners are “smeared”. This usually is caused by increased astigmatism and field curvature which is caused by the filter stack.
  • There is colorshift towards the corners which turn magenta for example.
  • There is also increased vignetting. This depends on the sensor itself, the Sony a7s and a7rII have least colorshift and vignetting.

3 thoughts on “Leica M and M39”

  1. I don’t know why but the link to the R lenses is leading me to this page dedicated to the M and LTM mounts

  2. Thank you for your review of the Jupiter 3 on Sony – I use a new similar rig – Sony A7II + L ME Helicoid + Jupiter 3 ( 1961 )

    I notice that subject lines of the photo tend to be broken – is there a way to fix this?

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