Bought a few months ago, I also have a Voigtlander Nokton 17.5mm. I shoot exclusively with the Olympus Pen F. I'm new to manual focus lenses - as long as you have focus peaking it's very easy to use. I have a 1 year old that I photograph with ease and who moves quickly. I really like the depth of field and the color rendering - the photos almost look "surreal". The lens has a weight that takes some getting used to. This lens seems built to last. If you're hesitating between 17.5mm and 42.5mm, I would definitely go for 17.5mm if you only buy one of the Voigtlander lenses. It's more versatile. I use my 17.5mm more than the 42.5mm.
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