![Best 28mm m42 lens](https://kumkoniak.com/58.jpg)
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I was glad to find out that Helios 44-2 58mm F2.0 works with this adapter because it’s not only my favourite lens, but also one of those lenses that even high-end users are happy to play with however positioning of the focus ring on this lens makes focusing pretty difficult unless you add a follow focus gear, as I did below. Helios (left) has a perfect shape, while MIR (right) isn’t quite perfect The lenses that have a chance are the ones that have a long mounting section like the Helios 44-2, have a cone-shaped back as found on MIR-1 and Pentacon 135mm (15 blade version) lenses, unfortunately the size and positioning of the focusing ring on MIR-1 means that it falls short of being compatible, but some sort of modification might be possible. I should say right away, that there aren’t many M42 lenses compatible with this adapter, because most lenses are wider than 53mm at the back (it’s very easy to tell when lenses will not be compatible). I’ve been testing this adapter will all my M42 lenses (compatibility list at the bottom). It allows one to secure the lens inside the PL mount, ensuring no there is accidental unscrewing of the whole lens, which is common with M42 mount lenses, especially those with tighter focus rings. What’s more, the improved version of the adapter now has a set screw in the m42 flange. After testing the lenses that were close to being compatible with the old adapter again, this time using the new one, I’m glad to say I was able to add 2 more lenses to the comparability list below. June 2016 update: RAF camera has released an improved version of the adapter with the 53mm opening allowing, adding 2mm that can make a massive difference to some lenses that previously were close to being compatible, but didn’t quite screw all the way in. RAFcamera makes the M42 to PL mount/adapter which looks more or less like the ARRI B/S to PL ones, so in theory M42 lenses can be used with it, but unfortunately, the options are limited to the lenses with the rear part no wider than 51mm, in particular the last the 8.54mm of it (see below). If we look at the cheap vintage photo lenses, then there is even less to choose from. Unfortunately, the options are limited to Arri Standard/ Bayonet and LOMO OCT18 mount lenses with not much else to choose from, at least not without a professional conversion. Once in awhile, I get asked about vintage lenses adaptable to PL mount cameras like Red Epic or Blackmagic URSA Mini (which can be bought with a native PL mount).
![Best 28mm m42 lens](https://kumkoniak.com/58.jpg)