Review on K&F Concept M42 to Sony E Mount Lens Adapter Ring for a6000 a6300 a6500 a5000 a5100 a3500 a3000 Alpha A7 A7R a7S a7II a7RII a7SII a7III a7RIII and a9 by Kassandra Harris

This is a very well made adapter. However, for lenses WITHOUT an aperture ring (most DA, FAJ lenses etc) the aperture ring is not strong enough to keep the aperture open at all times , the aperture ring will transition to the next f-stop at least one stop from full opening.This also occurs on lenses with an aperture ring when the ring is set to A or the widest aperture.On those lenses that are equipped with one Aperture ring, using the aperture ring on the lens is an easy fix, I really want to love this adapter, it feels great and fits great.