The answer to this question depends on your specific needs and preferences. The Canon 18-135mm lens offers a versatile focal range in a single lens, making it convenient for everyday shooting. On the other hand, the combination of the 18-55mm and 55-250mm lenses provides a wider range of focal lengths, which can be beneficial for capturing a variety of subjects such as landscapes and wildlife. Ultimately, if you prioritize convenience and versatility, the 18-135mm lens may be the better option, while if you value a wider range of focal lengths and potentially higher image quality, the combination of the 18-55mm and 55-250mm lenses could be more suitable. **

The Canon 18-135mm lens is generally not considered to be blurry. It is a versatile lens that offers a good balance of zoom range and image quality. However, like any lens, the sharpness of the images it produces can be affected by factors such as aperture setting, shutter speed, and the photographer's technique. With proper settings and technique, the Canon 18-135mm lens is capable of producing sharp and clear images. **

Upgrading from the standard Nikon kit lens to the 18-140mm lens can be worth it depending on your photography needs. The 18-140mm lens offers a wider zoom range, allowing you to capture a variety of shots without needing to switch lenses frequently. It also generally provides better image quality and sharper results compared to the standard kit lens. If you find yourself limited by the focal range or image quality of the kit lens, upgrading to the 18-140mm lens can enhance your photography experience. **

An 18-105mm lens can be sufficient for plane spotting, especially if you are shooting at a location where the planes are flying relatively close to you. This lens provides a good range of focal lengths, allowing you to capture both wide-angle shots of planes on the ground and zoomed-in shots of planes in the air. However, if you are at a location where the planes are flying at a significant distance, you may find that a longer telephoto lens, such as a 200mm or 300mm, would be more suitable for capturing detailed shots of the planes. **

The Canon lens 18-55mm may not be turning due to a few possible reasons. One common reason could be that the lens is not properly attached to the camera body, so it is not able to rotate. Another reason could be that the lens is stuck due to dirt or debris, which is preventing it from turning smoothly. It is also possible that there is a mechanical issue with the lens, such as a broken or jammed internal component. In any case, it is best to troubleshoot the issue by checking the lens attachment, cleaning the lens, and seeking professional help if necessary. **

The 137th element is a hypothetical element with the atomic number 137. It is not known to exist in nature and has not been synthesized in a laboratory. The existence of an element with an atomic number of 137 is purely theoretical and is not supported by current understanding of the periodic table and the behavior of atomic nuclei. **

137 is a prime number, and as such, it cannot be factored into smaller whole numbers. However, 137 can still be helpful in various mathematical and scientific calculations, such as in number theory, cryptography, or physics. Additionally, 137 is also the atomic number of barium, which has its own significance in chemistry and physics. Therefore, while 137 may not be easily divisible, it can still be a valuable number in certain contexts. **

One way to improve the Canon kit lens 18-55 is to use a lens hood to reduce lens flare and improve contrast in your photos. Additionally, consider investing in a UV or polarizing filter to protect the lens and enhance the colors and clarity of your images. Experiment with different shooting techniques, such as adjusting the aperture and focal length, to maximize the lens's capabilities and achieve different creative effects. Lastly, practice good lens care habits, such as keeping the lens clean and storing it properly, to ensure optimal performance. **