How to choose a few scenes SLR camera lens - the concept

Choose lens,jvc bn-v20u battery it is absolutely all after buying back camera SLR user a difficult problem. Choose the brand, narrowing the lens choice scope, but there are still many problems to be solved. For example:

Zoom and fixed-focus how to choose?

Why poor level 1 aperture size can differ so far?

Aperture why floating and constant cent?

One machine to two lens or buy a tianya mirror?

Whether all buy directly buy camera lens better picture?

More questions for beginners, time really hard to digest. If you find nearby of friend give too much advice, as first look this paper, make clear the concept of few scenes in front of mirrors would be more got the picture.JVC BN-VF823U Battery

1. Quality preconditions - fixed-focus must be better than zoom?

If you asked friends comments, believe almost all people will tell you fixed-focus camera quality than zoom lens. This statement is largely right, but it is not absolute. Just zoom lens itself also runs several kinds, if will set of machine zoom lens and fixed-focus camera, this rather than to have unfair.

From the lens quantity measurement

Fixed-focus camera is recognized quality good, maybe you just proved simple namely beautiful truth. Nikon AF - S with NIKKOR 50 f / 1.4 G, for example, lens number 8 pieces; only If it is a certain quality zoom lens, like nikon AF - S NIKKOR 24-70mm f / 2.8 G ED, need 15 pieces lens. Because it can zoom, lens increase is undisputable. But the more the easier lenses are bring some problems, such as chromatism - due to the increased number of internal refraction of light scattering, the higher the optical axis deviation, make the opportunity arise when high-contrast of purple edge is easier to appear. In addition, sharpness will also because after multiple lens and constantly discounts. So should pursue graphics, fixed-focus camera is first selection.JVC BN-VF815 Battery

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