How many times magnification is a 400mm lens

What is Lens Focal Length Focal length, usually represented in millimeters mm , is the basic description of a photographic lens. Standard Lens FX format approx. Telephoto Lens FX format approx. Super Telephoto Lens FX format approx. More Like This More articles like this. Article Collections. Articles like this, right in your inbox. First Name required. Last Name required. Email required. Popular Topics. These are all common birding lenses. Compared to the mm lenses depicted in the figure, the mm and mm lenses are obviously longer.

Keep in mind that the issue of brightness typically translates to shutter speed or other camera settings. But the act of compensating via camera settings can sometimes have unfortunate consequences: for poorly lit scenes, you may be forced to use a shutter speed that is so slow that the bird looks indistinct, due to motion blur motion blur is discussed in Chapter 6 , or if you instead just increase the ISO you may end up with an image that is very noisy.

In this way, the aperture of a lens can seriously affect the quality of your images, and this is why professionals generally prefer lenses with the largest apertures.

Most camera lenses have a built-in iris , or diaphram , which can open or close to various sizes to restrict the amount of light entering the lens, as illustrated in Figure 3. In this way, the aperture of a lens can be reduced, when needed. In addition to letting in more light, a lens with a large maximum aperture i. This can make a big difference in the aesthetics of your photos, since the bird will stand out more, and the background will be less likely to distract the viewer from the beauty of the bird.

For real-life birding situations, however, the focal length typically trumps lens aperture in overall importance, simply because focal length translates into magnification. Figure 3. The image on the right was taken after the bird had moved to a more open branch at more or less the same distance from the camera.

This image was taken at an effective focal length of mm. This is an enormous focal length, but given the distance and size of the bird, it was just right for getting the amount of detail I wanted in my subject. For my 10 megapixel professional camera body a model with a 1.

Thus, if you want very high image quality, I recommend getting all of your magnification from a combination of prime focal length possibly with a high-quality 1. It should be obvious that the ideal magnification for any shooting situation depends on the size of the bird and how close you can get to it. The owl is about the same size as a great horned owl Bubo virginianus , the blue bird is about the size of an eastern bluebird Sialia sialis , a typical American passerine , and the small purple bird is about the size of a typical New World wood warbler Parulidae.

The first example is for the warbler. Chirp Birding News. Birdlife International. Swarovski Optik. Best focal length for bird photography? Like 5. What is the magnification value of a camera lens? Source: Nikon To calculate the magnification value of a lens, the focal length value of the lens needs to be divided by 50mm, the 1X equivalent magnification. Maximum Lens Aperture Teleconverter 1. Topics: photography , lenses , lens , focal length , magnification.

Easy crafts for kids: How to make Birdwatching Binoculars! It is always great to discover new ideas for keeping your kids busy during holiday times or weekends Chirp Birding App 1. We are excited to announce the latest version of our iOS and Android app. A big thanks to all of our Top Bird Hides in Cape Town. There is nothing like relaxing in a nice bird hide and settling in for a good days birding.

If you a What is the heaviest bird in the world? When looking at the heaviest bird in the world, there are two distinct categories.

The first is the Featured Blog. Looking for a new pair of birdwatching binoculars and wondering if you should be going for 8x or 10x Why is Birdwatching Important? Birdwatching is important for many personal, societal and conservation reasons. Birdwatching provide How popular is birdwatching? So, how popular is birdwatching? On an APS-C digital SLR camera, the to zoom will have a field of view magnification equivalent to to mm on a 35mm camera. My tiny Canon SX has a 20x optical zoom that is equivalent to 28 to mm on a 35mm camera.

Check the owner's manual for your Sony, they almost certainly tell you the 35mm equivalent. The SX even has it right on the lens! It is like 5X at mm and 20X at the mm end of the zoom. This is because the Sony 35mm full frame equivalent is 31mmmm. If you put a mm lens on a crop body Canon 1. So, for all practical purposes you get 'more reach' with the dslr in this comparison.

A 30mm lens will provide you with a normal view or a magnification of 1 on a camera with an APS-C sensor. For a full frame a 50mm lens is considered a normal view. For a APS-C camera its 3. Please note that there is some debate as to what focal length is equivelent to the normal human eye.

So some people won't agree with me. From my own experience 4X zoom range is as far as I would go.