I never had a lens with a focusing tab and I wanted to give it a try. and inspired by Leica lenses I created a focusing tab for my Helios 44-2.
I have to say it was a great improvement to the manual focus experience. It offers additional leverage and it creates a slot for my index finger to rest in and easily pull focus.
While most of my soviet era lenses you can probably do this with just a ring and the tab the helios has 15 indents around its body so I wanted to leverage them for a better fit.
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The author marked this model as their own original creation.