Are the non-multi-coated lenses bad?
Lens coating is meant to improve color rendition, sharpness, contrast, and transmission. In general, a coated lens will give noticeably better results than an uncoated lens, and a multi-coated lens will give slightly better results than a single-coated lens. The difference will probably be most noticeable when using color reversal film (slide film). Differences in coating will not be as noticeable when using color negative film (because the printer affects the final outcome much more than the lens’ coating) and black and white photography. Lens coatings can also help to reduce flare, which is non-image forming light hitting the film. A good multi-coated lens will generally be more flare resistant than a single-coated or uncoated lens. But proper use of a lens shade or lens shading technique will go a long way to even the playing field between coated versus multi-coated in terms of flare. And, in general, coating differences will play a larger role in wide-angle lenses than they will in
