To make the Moon look so large in the background, photographers need to use superzoom telephoto lenses of at least 1,000mm ...

Manufacturers measure the focal length focused to infinity to keep a standard. Focal length is measured in millimeters. A 50mm lens will have a point of convergence of 50mm (or 5cm) from the sensor.

It depends on what kind of astrophotography you are focusing on. If your primary goal is super wide angle star fields, then ...

For example, my 8-inch SCT has a focal length of 2,032 mm. Imagine it like an enormous 2,000mm camera lens! This number can also be expressed via focal ratio, or f-number.

First up is a photo taken at 24mm, which is relatively close to the focal length of the camera on an iPhone. As you can see there is plenty of distortion in the photograph, and the car’s front ...

This means that you can multiply the focal length of lenses used on that camera by 2 to get the full-frame equivalent, so the Olympus camera’s 12–40mm zoom lens produces the same perspective ...

Earlier this week, it was rumored that Apple's upcoming iPhone 17 Pro models will offer up to 8× optical zoom, and this could ...

If it's reach you want, the Canon RF 200-800mm F6.3-9 IS USM is the obvious choice for most wildlife photographers. With the largest focal range on this list, it can zoom to a staggering 800mm to ...