Choosing and Using Lenses
Selecting Quality Lenses
Lens-makers generally build two classes of lenses. Prosumer lenses are made for the mass market and do a fine job most of the time. However, because these lenses must be affordable to everyone, they are made with less expensive glass and not built to the same construction standards as professional grade lenses. Lower glass quality means your images may be slightly less sharp (assuming you did everything else right) and the lens is more likely to malfunction at the worst possible time because it isn’t built as ruggedly. That said, prosumer lenses still do a quality job. If your photography technique isn’t flawless, you may never notice a slight loss of sharpness from the lower quality glass ...