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OK so for all of the vintage lens users out there here is the quickest tutorial your ever going to read to convert the sublime Helios 44M-4 to work as a fully manual aperture lens with your adapter (In my case the M42 to Fuji X.) In four steps.

1. Get a screwdriver that fits, most PC, watch repair, jewellery and hobby kits will have a suitable flat head screwdriver. Flip the lens over and take out the four silver screws.

2. This is the pin that is stopping the lens working in manual aperture mode

So when you have the screws out and have removed the back of the lens housing this will drop out.

3. The aim of the mod is to have the pin permanently depressed as it would have been in it’s original camera.

The easiest way to do this is to cut a length from a q-tip/cotton bud or Biro shaft – no need to measure it, it’s really not that exact of a science. Just cut enough so it’s roughly the same length as the amount of pin that was sticking out of the back of the lens.

4. Slip it over the pin and replace it back into the rear lens housing, screw it back down and hey presto! A Manual aperture lens. Told you it was easy.