This adaptall lens was made at a time when plastic was being used to cut costs by most lens makers. It is very light, not well made and quite clunky. The focus/zoom ring is not dampened well, Focusing is difficult to nail and almost impossible to maintain. It's a shame because the optics aren't bad. I took some quick pics fom the window. I shook a little on some of the pics. Sharpness is acceptable. Actually, it is better than many lenses which cost much more. Contrast is low at 210mm. Color rendition and saturation is a bit flat but not bad. There is noticeable fringing in high contrast scenes. but you may not see it in standard prints. For $20 it is a good usable lens optically, but the cheap feel may be a turn off for you as it is for me.