Review on Pentax SMC DA Series 50-135mm f/2.8 ED IF SDM Telephoto Zoom Lens for Pentax DSLR Cameras: Enhance Your Photography by Ha Joon

It is advisable to immediately buy and wind some kind of protective filter. Even despite the special coating of the front lens, with which almost everything is wiped off, it will be a pity to spoil the lens, even though dirt on the front lens has little effect on image quality. Some pros: Professional series with protection against dust and moisture. The picture quality is excellent, soft bokeh, sharp. Easy and smooth rotation of the focal and sharpness rings. Good resistance to backlight. Cons: Heavy and large, but for such a aperture is normal. Focuses slowly. In my copy, in addition, when focusing from the infinity position, back focus appears. From zero focuses excellently.