Thanks for the review. I too bought one, I bought it mainly for my IIIf, at the same time that I bought a Nokton 50/1.1 for my M2. I enjoy my Heliar 3.5, it is one fantastic lens. I use it mainly with the IIIf, also with a IIIa, but I have used it with the M2. The Nokton is a heavy lens, the Heliar is much more minimalist, I agree. I like to go out with no lightmeter and do just as you did, have fun. I have a roll of Kodachrome 200 in the IIIf. I have only a few rolls left, I'll shoot one in the Barnack, and the rest in my M2.