To set the Tamron 70-300 lens to infinity focus, rotate the focus ring all the way to the right until it stops. This will ensure that the lens is focused at infinity, allowing you to capture distant subjects sharply. Keep in mind that some lenses may have a hard stop at infinity, while others may not, so it's important to test the focus to ensure it is set correctly. **

Strange noises after focusing with a 70-300 lens could be caused by a variety of factors. One common reason is the lens motor struggling to focus, which could be due to a mechanical issue or debris interfering with the movement of the lens elements. Another possibility is that the lens is reaching its maximum or minimum focusing distance, causing the motor to make unusual sounds. It's also worth checking if the lens is properly mounted on the camera and if the contacts are clean, as poor connections can sometimes lead to strange noises during focusing. **

The choice between the Tamron 70-300 and the Canon 55-250 depends on your specific needs and preferences. The Tamron 70-300 offers a longer focal length range, making it suitable for capturing distant subjects, while the Canon 55-250 is more compact and lightweight, making it a better option for travel and everyday use. Consider factors such as your shooting style, the types of subjects you typically photograph, and your budget to make the best decision for your needs. Additionally, it's important to research and compare the image quality, autofocus performance, and build quality of both lenses before making a decision. **

The answer to this question depends on your specific needs and preferences. The Tamron 70-300mm lens is better for capturing distant subjects with its longer focal length, making it ideal for wildlife or sports photography. On the other hand, the Sigma 18-250mm lens offers a wider focal length range, making it more versatile for capturing a variety of subjects without needing to change lenses. Consider what type of photography you will be doing most and choose the lens that best fits your needs. **

The Tamron lens 70-300 may be dark and not triggering anymore due to a variety of reasons. It could be a problem with the lens's aperture, causing it to not open properly and resulting in a dark image. Additionally, there may be an issue with the lens's connection to the camera, preventing it from triggering and capturing images. It's also possible that the lens has a malfunction or damage that is affecting its performance. It would be best to have the lens inspected by a professional to determine the exact cause of the issue. **

Strange noises after focusing with a 70-300 lens could be caused by a variety of factors. One common reason is the lens motor struggling to focus properly, which can result in unusual sounds. Another possibility is that the lens elements are not moving smoothly, leading to friction and noise during focusing. It's also worth checking if there is any debris or obstruction within the lens that could be causing the noises. If the issue persists, it may be best to have the lens inspected by a professional to determine the exact cause and necessary repairs. **

The autofocus of the Tamron 70-300 VC USD is generally considered to be adequate for most situations, but it may not be the fastest option available on the market. For fast-moving subjects or action photography, some users may find the autofocus to be a bit slow and struggle to keep up with the agility of the subject. However, for general photography purposes, the autofocus should be sufficient for most users. **

You can find out if the Tamron 70-300 lens fits your Sony Alpha 58 by checking the lens mount compatibility. The Sony Alpha 58 uses an A-mount, so you will need to ensure that the Tamron 70-300 lens is also compatible with A-mount cameras. You can check the product specifications on the Tamron website or contact their customer support for confirmation. Additionally, you can also consult with a camera equipment retailer or professional photographer for guidance on lens compatibility. **