Don't judge a lens by its price. This lens performs well and is made well. The 135mm f3.5 is compact and built solid. Aperture clicks at f3.5 then f5.6 and then at 1/2 stops beween f5.6 and f16. It has a built in hood. Focus throw is a long 3/4 turn. Minimum focus is approximately 4.5 feet. It handles well on the Eos M3. Focusing with 135's can be a chore but this one isn't too bad. At f3.5 it is reasonably sharp but does suffer from purple fringing. At f5.6 it tightens up. I have only shot a few pics with it but I can say that it performs well at medium to long range. Contrast is consistent and quite good for a budget telephoto.