Yes, the Sigma 70-200 2.8 APO USM is a good lens choice for horse photography. The 70-200mm focal length range allows for versatility in capturing both close-up portraits and action shots of horses. The fast f/2.8 aperture is ideal for shooting in various lighting conditions, and the APO (Apochromatic) design helps to minimize chromatic aberrations for sharp and clear images. Additionally, the USM (Ultrasonic Motor) provides fast and quiet autofocus, which is beneficial when photographing moving subjects like horses. **

The Sony 70-200mm f/2.8 G SSM II lens is suitable for Sony A-Mount APS-C cameras. This lens is designed specifically for Sony A-Mount cameras and provides a versatile zoom range with a fast f/2.8 aperture, making it suitable for a wide range of photography applications. Its high-quality optics and build make it a popular choice for professional photographers and enthusiasts alike. Additionally, it is compatible with Sony's APS-C sensor cameras, providing an effective focal length of 105-300mm. **

The focus problem with the Canon EOS 7D and the 70-200 2.8L lens is related to the autofocus system. Users have reported issues with inconsistent autofocus performance, particularly in low light conditions or when tracking moving subjects. This can result in missed focus or soft images. Some users have also experienced front or back focusing issues, where the camera consistently focuses slightly in front of or behind the intended subject. Canon has released firmware updates to address some of these issues, but they may still persist in certain situations. **

It is difficult to determine a clear winner without more information about the specific individuals involved. In general, the Muay Thai fighter may have an advantage in terms of speed, agility, and endurance, which could be beneficial over a 200-meter distance. However, the bodybuilder's strength and power could also be a significant factor, especially if the race involves obstacles or challenges that require physical strength. Ultimately, the outcome would depend on the specific abilities and training of each individual. **

Many new AirPods being sold for significantly lower prices on Vinted are likely to be counterfeit or fake products. These sellers may be trying to pass off imitation AirPods as genuine ones in order to make a quick profit. It is important to be cautious when purchasing items at such low prices, as they may not meet the quality and performance standards of authentic AirPods. It is always best to purchase electronic devices from reputable retailers to ensure that you are getting a genuine product. **

No, 70 and 70 degrees Celsius are not normal temperatures for a CPU. Ideally, a CPU should operate at temperatures below 60 degrees Celsius to ensure optimal performance and longevity. If a CPU consistently operates at 70 degrees or higher, it may indicate inadequate cooling or a need for better thermal management. It is important to monitor and address high CPU temperatures to prevent potential damage or performance issues. **

To determine how many kilograms of sand are needed for a 70-liter aquarium, you first need to decide on the depth of the sand bed. A common recommendation is to have a sand bed depth of around 1-2 inches (2.5-5 cm). Assuming a depth of 2 inches, you would need approximately 14 kilograms of sand for a 70-liter aquarium. It's important to consider the type of sand being used, as different types have varying densities which can affect the weight needed. **

The probability of at least 198 trees being damaged out of 200 can be calculated using the binomial distribution formula. The probability of at most 70 trees being damaged can also be calculated using the binomial distribution formula. Then, the probability of both events happening can be found by adding the probabilities of each event occurring. This will give the overall probability of at least 198 trees being damaged and at most 70 trees being damaged out of 200. **