What does SLR dog head mean?

The so-called dog head is the floorboard of economical and practical lenses. The imaging ability of dog head is average and the aperture is small, which is suitable for beginners, but the imaging of dog head is generally better than the lens of consumer digital camera.

The antonyms of "dog head" are "bull head" and "golden head".

Bull's head is a professional lens with high price and good quality, such as Canon's red circle L lens. The gold head is Nikon's gold ring lens. The prices of tauren and jintou are very high, which are generally only suitable for professional photographers.

The head between the dog's head and the cow's head is called "donkey's head". The image of a donkey's head is much better than that of a dog's head, and slightly inferior to that of a cow's head. Because it is not because of the constant large aperture or slightly small aperture ring and lens material, the price is lower than that of tauren. Generally speaking, it refers to the standard dimming that is more practical and has better imaging, or a mirror for tourism. For example, Nikon's 18-200mm, 24-85, 28- 105 lenses all belong to donkey's head. The price of donkey's head is generally below the cow's head and above the dog's head. Donkey's head is most suitable for amateur photographers.