Purchased together with the EOS M, delivered on time, packaged well, the ring is beautifully made and immediately inspires confidence. Given the price, this is the ideal choice to keep its original objective Park. Easy assembly and no problem, she accepts the EF and EF-S lenses maintaining the electrical connection box / lens and automatic autofocus. Tested with the Canon EF 50mm 1.8 and Sigma 18-250 Macro OS HSM (photo) is effective and latency (I expected no less). This product simply and perfectly fulfills its function and alone justifies my transition into this amazing and gorgeous hybrid. I can only recommend this purchase without reservation.
