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. **

To photograph stars with the Olympus OM-D E-M10 Mark II, you will need to use a wide-angle lens with a fast aperture, such as a 12mm f/2.0 lens. Set the camera to manual mode and adjust the settings to a high ISO (1600-3200), a wide aperture (f/2.0 or lower), and a long exposure time (15-30 seconds). Use a tripod to keep the camera steady and a remote shutter release or the camera's self-timer to minimize camera shake. Additionally, consider using the camera's built-in image stabilization feature to reduce any potential blur from camera movement. **

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. **

Yes, an external microphone can be connected to the Olympus OM-D E-M10 Mark II. The camera has a 3.5mm microphone input port, allowing you to connect an external microphone for better audio quality when recording videos. This feature is particularly useful for vloggers, filmmakers, and content creators who want to improve the sound quality of their videos. By using an external microphone, you can capture clearer and more professional audio to complement the high-quality video capabilities of the camera. **

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. **