The decision between the 5D Mark IV and the 6D Mark II depends on your specific needs and budget. The 5D Mark IV offers higher resolution, better autofocus system, and faster continuous shooting, making it a better choice for professional photographers and those who need advanced features. On the other hand, the 6D Mark II is more budget-friendly and still offers good image quality, a vari-angle touchscreen, and built-in GPS and Wi-Fi, making it a good choice for enthusiasts and hobbyists. Consider your photography needs, budget, and the specific features offered by each camera before making a decision. **

The Canon EOS 850D is a great entry-level DSLR camera with good features for beginners. The Canon EOS 5D Mark II is a more advanced camera with better image quality and low-light performance, making it suitable for enthusiasts and professionals. The Canon EOS 5D Mark III is even more advanced, with improved autofocus and faster continuous shooting, making it ideal for professional photographers who need top-notch performance. Ultimately, the best camera for you depends on your skill level, budget, and specific photography needs. **

For kindergarten photography with the Canon 7D Mark II, you may want to consider a fast prime lens like the Canon EF 50mm f/1.8 STM or the Canon EF 35mm f/2 IS USM. These lenses have wide apertures that allow for faster shutter speeds in low light situations and produce beautiful background blur to make your subjects stand out. Additionally, their compact size and lightweight design make them easy to handle when photographing active kindergarten children. **

The Canon EOS 6D Mark II may not trigger due to a variety of reasons. Some common causes could be that the battery is low or not properly inserted, the memory card is full or not inserted correctly, the lens is not attached properly, or the camera is in a mode that prevents it from taking a picture. It is also possible that there is a technical issue with the camera that requires professional attention. **

No, not all lenses fit the Canon 7D Mark II. The Canon 7D Mark II uses the EF mount, so it is compatible with Canon EF and EF-S lenses. However, it is not compatible with lenses from other brands or lenses with different mounts. It is important to check the compatibility of the lens with the camera before purchasing to ensure it will fit and work properly. **

No, the Canon M50 Mark II is not waterproof or splashproof. It is not designed to withstand exposure to water or moisture, and using it in such conditions can damage the camera. It is important to take precautions to protect the camera from water and moisture, such as using a protective case or cover when shooting in wet conditions. **

For kindergarten photography with the Canon 7D Mark II, you may want to consider a lens with a wide aperture to capture sharp images in low light and to create a shallow depth of field for beautiful portraits. The Canon EF 50mm f/1.8 STM lens is a popular choice for its wide aperture and affordability, making it a great option for kindergarten photography. Additionally, the Canon EF 85mm f/1.8 USM lens is another excellent choice for capturing stunning portraits with its wide aperture and telephoto focal length. Both of these lenses would be great options for kindergarten photography with the Canon 7D Mark II. **

Not all lenses fit on the Canon 7D Mark II. The Canon 7D Mark II uses the EF and EF-S lens mount system, so only lenses with these mounts are compatible with the camera. It is important to check the compatibility of the lens mount before purchasing or using a lens with the Canon 7D Mark II to ensure proper functionality and image quality. **