How much is 200mm zoom

A lens mount gasket is not present, but the switches, focusing ring and zoom ring have moderate dust and moisture resistance. A front filter should be used for sealing purposes. At most focal lengths, corners are slightly soft until the lens is closed an additional stop. As I get time, I retest questionable results - Or even buy another copy of the lens to insure accurate but expectable results.

The chart is tough on optical performance, and real life images do seem sharper. The difference is said to be caused by the extra lens elements in the IS version.

And, the middle and edge image quality from the IS lens is better at the longer end of the focal length range. My subject is seldom in the center of the frame, so corner image quality is more important than center-of-the-frame image quality to me. Even with a 1.

I've had two copies of this lens - both performed similarly. Very minor barrel distortion is present at 70mm. Pincushion distortion is present by mm and moderate at mm. They tend to use large apertures and allow a lot of light to enter the lens which makes them fast in low light conditions. Standard lenses are the popular choice for a wide range of photography including portraiture, nature and low light situations where the photographer can not use a flash or is looking to capture the scene with available light.

Telephoto lenses between 70 — mm are very popular lenses for portraiture and product photography as well as nature and wildlife imagery. They allow the photographer to produce close crops on the subject. In the case of portraiture a telephoto allows the photographer to take the photo at a distance that does not intrude upon the subject. These lenses provide a good range for wildlife and sports photography where the photographer is limited as to how close they can get to the subject.

Close-up photography uses a specific range of lenses that allow up to reproduction. These lenses allow the photographer to focus very close to the subject and reproduce them at a life-size ratio on film or an imaging sensor. These lenses are popular for subjects such as flowers, insects and small products.

By clicking Sign Up, you are opting to receive educational and promotional emails from Nikon Inc. You can update your preferences or unsubscribe any time. Related: What does 'how much zoom' mean? The "mm notation" is the focal length. Note that when computing the zoom ratio e. You are right. That's it :- — MetroWind. It's pretty nice. Show 1 more comment. Active Oldest Votes. Improve this answer.

Add a comment. It will depend on how you define the "zoom factor". Is it field of view or focal length? Nick Bedford Nick Bedford 9, 3 3 gold badges 27 27 silver badges 40 40 bronze badges. Just focal length, I'm only considering the magnification of the image.

Actually, I think it is linear, isn't it? That's because zooming is mathematically like cropping, so each doubling of focal length is halving dimensional field of view in a very straightforward way.

Nick Bedford, mattdm - I'd stress that the actoal FoV change is indeed nonlinear. For relatively long focal lengths, the angles are small and the change is approximately linear. However, as you get to the wider side, the angles become large and the mapping from focal length to angle of view is nonlinear. That said, I never saw a definition of zoom range w. Update the graph to have a logarithmical x-axis, and you would see a straight line : — Pete.

Show 7 more comments. Anand Anand 79 1 1 silver badge 2 2 bronze badges. Olin Lathrop Olin Lathrop You can make it stronger, the 2x and 3x zooms are nearly always much higher image quality and often build quality than the 8x and 10x zooms from the same brand.

The classic zoom in both the Canon and Nikon lines is the , just a bit under 3x. Nearly all 8x and 10x zooms are consumer-level products. They are designed to a price, with image quality a lesser design criteria. Scot Cannon Scot Cannon 1. I think you may have interpreted the question incorrectly. On the lens itself, the five switches for focus and stabilization are sensibly located and easily reached. The included, optional lens hood is well-made, and features a brilliant trick: a small window which can be opened to allow you to adjust the position of filters such as a polarizer without having to take the whole hood off.

Autofocus is powerful, thanks to the introduction of twin Nano USM motors — seen here for the first time in a Canon lens. Continuous AF is almost eerily quiet when in both stills and video modes, which is a real advantage when shooting flighty wildlife subjects or a wedding ceremony where being unobtrusive is key.

We were testing the lens on the Canon EOS R5, making it possible to get up to eight stops of stabilization overall. In terms of image quality, the results are just beautiful.