3/15/2021 0 Comments Nikon Dslr Lenses Guide
But prime lenses still have some very real advantages; compared to zooms they tend to be smaller and lighter, have faster maximum apertures, and give sharper images.This is the first step to realizing the flexibility of a system camera, but with the bewildering variety of options available on the market, you could be forgiven for wondering just why you left behind the relative simplicity of a compact camera.Lens names often include long lists of letters and numbers, which certainly sound impressive but can also be thoroughly confusing to the newcomer.Luckily you can safely ignore most of them to start off with, and concentrate mainly on just a few things.
Zoom lenses are named using two numbers which indicate the extremes of the range, for example 18-55mm for a typical kit zoom lens. Fixed focal length lenses which dont zoom (also widely known as primes) just have a single number ( e.g. AF-S, describes the type of autofocus motor, ED means Nikon has used Extra Low Dispersion glass in the lens design, and G denotes automatic aperture selection (rather than mechanical in earlier lenses). The conversion table shows how these relate to two other standard sensor sizes, namely full-frame which is the same size as a 35mm film negative, and Four Thirds which is used by Olympus and Panasonic (see our DSLR Buying Guide for more information about sensor sizes). Apertures can be expressed in several different ways, with F4, f4, 1:4 all meaning the same thing. A smaller number means the lens has a larger maximum aperture and therefore gathers more light; an F2.8 lens collects twice as much light as an F4, for example. Larger apertures also give decreased depth of field ( i.e. Pentax and Olympus incorporate it into the camera body, whereas Canon, Fujifilm, Nikon, Panasonic and Samsung use systems built into the lens. Sony (slightly confusingly) uses in-body Super Steady Shot for its Alpha SLT cameras, but in-lens Optical Steady Shot for its Nex system cameras. Image stabilization is especially useful with telephoto lenses, so is worth bearing in mind when comparing the available options. However high end Canon, Nikon and Sony cameras sport so-called full frame sensors, which means purely that they are about the same size as a 35mm negative, i.e. ![]() Panasonic and Olympus, meanwhile, use the slightly smaller Four Thirds sensor format in their interchangeable lens cameras. Lenses designed for full frame will also work just fine on APS-C cameras. However APS-C lenses wont work properly on full-frame cameras, and in the case of Canon, its physically impossible to attach an APS-C-optimised EF-S lens to a full-frame camera. This is something worth bearing in mind if you are thinking of upgrading to a full frame system in the near future. At the time of writing, Tokina doesnt make any lenses of this type. There are a couple of exceptions - Olympus and Panasonic both use the Four Thirds mount for DSLRs, and the Micro Four Thirds mount for their mirrorless interchangeable lens compacts (ILCs). Samsungs now-obsolescent SLRs were essentially re-badged Pentax KAF-mount models, however the company is now concentrating on its NX ILC series. All EF and EF-S lenses can also be used on the EOS M via Canons own adapter, which maintains autofocus and image stabilization functions. Its X-system mirrorless cameras use the entirely different XF mount. Nikon makes an adapter to fit F-mount lenses to its 1 System mirrorless cameras, but again only lenses with built-in motors will autofocus.
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