Some Canon camera lenses are marked with red circles, green circles, or white circles. What are the differences? Please tell us their differences in detail!

Differences: professionalism, imaging quality, lens type, and aperture.

1. Professionalism

1. The red circle is a professional-grade full-frame lens, an L-level lens.

2. The green circle uses professional-grade full-frame lenses with diffractive optical elements (DO elements), including 70~300mmF4.5-5.6DOIS and 400mmF4DOIS.

3. The white circle is a lens specially designed for the APS body. One of the lenses is EF-s17~55mmF2.8IS. They are also Canon's special lenses for half-frame, usually lenses with IS optical image stabilization.

4. The golden circle is an ordinary full-frame lens.

2. Imaging quality

1. The red circle has good imaging quality.

2. The quality of the green circle lens is medium, with rich colors and good image quality.

3. The image quality of the white circle is medium to low.

3. Lens types

1. The red circle usually uses multiple ultra-low dispersion lenses, aspherical lenses or even fluorite lenses.

2. The green circle is usually DO lens technology. This Canon's unique DO lens technology means "multi-layer diffractive optical lens".

3. Gold rings cannot use many aspherical and low-dispersion lenses, let alone fluorite.

4. Aperture size

1. The maximum aperture in the red circle is relatively large. For many zoom lenses, the maximum aperture is a constant aperture.

2. The maximum aperture of the gold ring is small, and the zoom head does not have a constant maximum aperture.

5. Functions

1. The lens in the red circle has a wide-angle function.

2. The green circle is the telephoto lens. It has better dispersion elimination function. Achieved lightweight of telephoto lens.