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## What does a 300mm lens mean?

Focal lengths such as 300mm or 400mm would be a large, heavy telephoto lens for taking photos of birds or airplanes. Just remember – a small number is wide, a large number is telephoto. Two numbers together, e.g. 35-105mm, means that the lens zooms from one focal length to another.

What is the 300mm lens good for?

So what are telephoto and superzoom lenses, like a 70-300mm, used for? They’re best when you want to get close to a distant subject. It could be a building on the horizon or a face in a crowd. They’re perfect for wildlife photography, where you can’t get close to the animals you want to shoot.

### What is the difference between 300mm and 400mm lens?

The difference between 300mm and 400mm isn’t that great, but bear in mind that the 400mm prime will almost certainly be sharper than the 70-300. As somebody said in a another thread, the angle of view of the 400mm lens will be 300/400 = 3/4 of the angle of view of the 300mm. This is a great tool.

What can I shoot with a 70-300mm lens?

A 70 to 300mm lens a is a telephoto lens that has a zoom function. There is an advantage in using the 70 to 300mm lenses as they offer versatility. Such a lens can be used for daylight telephoto subjects including wildlife, travel, candid and portrait shots due to its wide range of focal length.

#### How far does a 500mm lens shoot?

So a 500mm lens would show the subject the same size at 50 yards (10 yards x 5).

How is the magnification of a 300mm lens determined?

As stated, in determining the magnification factor of a lens, you divide its focal length by 50mm. In this case, your 300mm lens would have a magnification of 6 (6x).

## What’s the zoom ratio of a 30mm lens?

For example, a 30mm – 300mm zoom lens will have a zoom ratio of 10 (300/30). This 10x in no way refers to the absolute magnification of the lens, only the range from the minimum focal length, 30mm, to its maximum, 300mm. Per Bob, who discusses magnification, a 50mm lens is often considered to have a similar image scale to the human eye.

Which is better a 300mm lens or a binocular lens?

You need to take the camera film or sensor size into account to make a proper calculation. For instance, a 300mm lens on a 1.5 FOV factor digital camera would be roughly equivalent to a 9x binocular. And a 300mm lens on a 4×5 would be roughly equivalent to a 2x binocular.

### What’s the difference between a 400 mm lens and a 50 mm lens?

The most usable general understanding to compare magnification of focal lengths (for same sensor and same distance) is that the resulting image size is the simple ratio of the two focal lengths. Compared to a 50 mm lens, a 400 mm lens will show an enlarged view 8x the subject size and 1/8 the Field of View (400/50 = 8).