The individual thinks, with focussing still is scorch, be stem from oneself film demand and picture ask character, do not have the stand or fall on firm sense, have the branch that suit and does not suit only, focus the meaning that also did not exist at the same time with scorch otherwise:
Zoom lens perspective is agile, can get used to a variety of subject matter to film, this is its serve as hang the dominant position with the largest nose:
But zoom lens structure is relatively complex, the control such as distortion, chromatic dispersion is a few more difficult also, so with focus photograph comparing, picture qualitative respect should lose a bit a few:
Of course, not be to say all scorch picture is qualitative poorer than focussing. Want to promote scorch picture to pledge, have the following train of thought commonly:
1, stop down
The simplest, cost also lowest, resolution of OK and effective promotion, restrain undesirable differ, than the 18-135 turtleneck that as usual sees, use the float aperture of 3.5-5.6:
2, use large size lens (increase camera lens volume)
Because the physics of camera lens structure is characteristic, edge horn picture pledges general meeting loses to pledge at central picture, not only resolution can be reduced, chromatic dispersion, distortion is relatively a few more serious also. Use the lens of larger requirements, can increase to be accumulated like occasion (into size resembling a loop) , will become cut into parts like part of the part side weaker cut, indirect promotion camera lens draws on average qualitative:
Use the lens of larger requirements, increase aperture more easily also, time of unit of promotion camera lens takes smooth amount, this also is the main reason with larger volume of zoom lens of a lot of big aperture:
3, lower coke ratio
Lower coke ratio, structure of theoretic OK and compact camera lens, distortion undesirable discrepant control is relatively a few easier also. What as usual sees is big 3 yuan, coke ratio is in 3 the following:
Focus head structure simple, differ control is relatively easy, make big aperture more easily also, the picture is so qualitative go up to take actor generally:
But fixed perspective is to focus hang opportunity is the greatest short board, after all can the leg moves scorch. Use convenience sex for give attention to two or morethings, focus average focal length as what hang nose shorter, give priority to to the part of the body cavity between the diaphragm and the umbilicus housing the spleen with extensive role, with 135 complete for exemple, general 28-50mm left and right sides sees more quite:
To professional cameraman, emphasize not quite commonly " hang machine " concept. Because of professional cameraman main energy is put in commerce to film on the task, the corresponding sex of camera lens and subject matter is stronger. Say popularly, take what subject matter (the task) use what camera lens, hanging the concept of machine so is to be not the user of professional cameraman character normally:
To raise the specific aim of the proposal, farther cent is two kinds, one kind is the photography lover with qualitative to the picture higher demand or creation person; One kind is the person that do not have the average family expenses of special requirement. Small K is Ni Kang uses the home, it is with Ni Kang exemple say specific type:
1, photography lover or the person that create: Extensive role is focussed / high quality scorch (small coke ratio)
Complete: Scorch considers 24-70/2.8G ED
Focus a proposal to consider 28 decide or 35 calm, suitable scope is a few wider:
28 wider, accuse difficulty relative to 35 some taller, clairvoyant deformation is more apparent also, want to notice when the choice. Afore-mentioned camera lens still have 1.8 edition, sexual price is compared some taller.
Half range: Choice scope is a bit a few less, proposal 35G, or go up simply complete a 28/1.8, relatively light, focal length does not calculate too long, upgraded to also use later:
2, average family expenses person: Scorch of old coke ratio
Average family expenses person, convenient for first, picture of give attention to two or morethings is qualitative:
Complete: 24-120/4G ED VR:
Half range: 16-80/2.8-4E ED VR:
Limited space, offer reference only, hope to be helped somewhat.
