Existing 600D, bought a 24-70 second generation that day. I just like photography. Is it necessary to buy the whole picture? How many benefits are there?

We know that SLR cameras have entered the digital age, and traditional chemical negatives have been replaced by digital photosensitive elements, which are divided into APS-C (collectively referred to as half-frame), APS-H (collectively referred to as half-frame) and FX format, and FX is Quan Huafu. Quan Huafu means that the size of digital photosensitive element is equal to the size of 35MM film, and the length-width ratio is 3: 2. Quan Huafu is a format that can really exert the power of wide-angle lens. For example, the 600D you mentioned is an entry-level camera, and the sensor used is APS-C, while the second generation of Canon 24-70 is the Quan Huafu equivalent focal length specially developed by Canon for Quan Huafu digital SLR, and the professional zoom factor is no more than 3, so it has many Canon patents, so it is a professional lens.

The imaging angle of the lens 24-70 is equivalent to 18-55 in a half camera, but the workmanship, imaging and control are different. If 24-70 is used on a half-width machine, the wide angle at the 24-end actually becomes 36 mm, and the telephoto at the 70-end becomes 105 mm, which means that the wide-angle end is no longer wide and the telephoto end is longer. I thought you were either fooled by the merchants or rich. In short, this is quite stupid. This pony can't pull 24-70, and it can't reflect the role of 24-70 as a professional cattle changer in Quan Huafu. On the contrary, it will appear top-heavy on 600d, and the image quality will be damaged, which is not a wise choice.

But there is no need to prepare for the future full-width machine.