Traditional Culture Encyclopedia - Photography major - What does G-head mean (not lens)

What does G-head mean (not lens)

Dog head-G head, corresponding to cow head. It is an evaluation of the quality of SLR playmates and lenses. For example, Canon's red circle lens is a bull's head. Of course, it doesn't mean that the lens of the accused dog's head is useless. For example, Canon 50mm F 1.8, the lens quality is not bad, mainly due to poor workmanship and cheap price.