I want to use a Helios 44K-4 58mm f/2 on my Sony A6000. I found an adaptor with aperture ring, but the lens already has an aperture ring. Can I use it anyway?
This is the adapter: K&F Concept PK/DA-NEX Adapter
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Adapters with aperture control rings should work fine with lenses that also have aperture-control rings. Set the adapter aperture to "wide open".
Note that, in this case, the adapter is marked for both PK lenses, which typically have their own aperture-control rings, and DA lenses.