Traditional Culture Encyclopedia - Photography major - Can two photographic lens groups be combined into a super telephoto lens?

Can two photographic lens groups be combined into a super telephoto lens?

Theoretically, two photographic lens groups can be used to synthesize a super telephoto lens. This method is called "lens superposition", which requires special lens adapter ring and bracket, and requires very accurate focusing and adjustment, otherwise the imaging quality will be affected. In addition, the superimposed lens will also increase the weight and volume of the lens, which is inconvenient to carry and use.