; is in DSLR (digital single shot turns over illumination camera) on the choice of camera lens, small the choice that is apart from camera lens to have a variety of different focus, have to Sunday run from the standard, different focal length can be affected " leave to focal length recently " length, resemble wanting to film likewise 1: The size of 1 fold, the standard is small be apart from camera lens to must stand by the object that be photographed as far as possible, but Sunday run is small it is OK to be apart from camera lens smaller than the standard be apart from a few further, scare not easily quite so more sensitive biology. What the attention wants here is, the accident of the focal length of camera lens and times size did not concern absolutely. Small the focal length that is apart from camera lens is as follows roughly:
* standard is small be apart from camera lens (50-60mm) : Suit abecedarian, film hare of ghost dragon, sea not scary frightened biology
* middle distance is small be apart from camera lens (90-105mm) : Suit to enter rank person, film general and of all kinds marine biology
* Sunday run is small be apart from camera lens (180-200mm) : Comfortable in harmony photographs Sha Man, lacy eel to wait scary frighten or be to not allow to rely on too close biology easily
Besides camera lens, still a lot of means can let general camera " upgrade " , become the photography that can pat nearly to combine, photograph filter lens nearly for example (Close-up Filter, Close Up Lens) can photograph different diopter collocation of filter lens freedom to go out nearly those who want is small be apart from photography effect, what because be single lens,undertake is add, transformed original lenticular combination, can cause spherical difference and distortion, make video brim diminution of quality, and when be being operated must stop down.
It may be said of the close lens that absorb strain is the most convenient small be apart from fittings, before simply is added in camera lens, can obtain small be apart from the effect. Express with name number commonly, name number magnifies the effect heals namely greatly more big. General the magnifying power that gets 1/2X can be photographed about before the close lens absorbing strain of 3 is added in 50mm camera lens; And the close lens absorbing strain that different name counts is to be able to add in use, its name number also can be two add in (of course, add so that heal much optics pledges element drops so that heal fast) .
After augmenting the close mirror that absorb strain, camera lens can is opposite in a very few limits only anxious, and because photograph filter lens nearly the design is simpler, qualitative to optics element is affected also bigger, can put important principal part when use it is better to can make pledge element is behaved in the center of close photo. Complex of group of a kind of many lens photographs filter lens nearly, can offer relatively beautiful qualitative element. But of high price also have carry out inaccessibly. Nevertheless everybody meets the likelihood to produce the manufacturer of HOUSING to have a replacement that uses for be being photographed nearly alertly is this kind of product.
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