2016年4月21日 星期四

Macro -

What is MACRO

Macro is 1:1.  Actual = size of the image

WAYS IN ACHIEVING MACRO IMAGES

1.  Close up filter (放大鏡):  +1, +2, +3, +4, +10, etc

-  every len has a limit of the closest distance to the subject (it is shown on the len)

-  add a +1 filter, it will enlarge somewhat

-  add a +2 filter, can move len closer the object plus 2-sec delay setting to avoid shaking

-  can add two filters together on top of len, placing the biggest one at the base, i.e. +3, +2, then +1 = total +6

-  use a tripod with a center column free to move up/down the camera body

-  adding a close-up filter to len does not affect the apecture

-  shortfall however is image will be slightly deformed i.e. rectanglar shape is curved

-  adding a +10 filter can blow up image like inserts, bees, flowers; quality of image however will be sacrified


2.  Adding a tube inbetween the body and len - extension tube

-  it separates the body and the len; the wider the distance, the larger the image

-  no element of glass; hence, no deform of images

-  when get very close, there will be loss of light however which can be compensated by adjusting:

(i)  aperture - problem of depth of field arises; only part of the subject is sharp, rest is blurred

(ii)  iso - high iso creates noises

(iii)  shutter - the lower the speed; the higher the chance in shaking

-  "working distance" a distance between surface of object and the len

-  the shorter the working distance, the more difficult it is to 打燈


3.  增距鏡 (there is a factor of 1.4 or 2)

-  performance downgraded significantly and aperture is down one or two grade

4.  Bellon

-  pull the bellon closer or farther away to focus, like working with manual

5.  Turn the len upside down

-  all lens when used upside down is a macro len

-  use with a reversal ring ($3/400).  look for Yodobashi in Japan for photo equipment

6.  Macro Lens


FLASH

Ring flash - flash in form of a ring in circle

Angle of flash used affects significantly the three-dimensional feel of the object

Release of light flash 收窄 can show the dimensions of the object

Light shed on the object creates shadow and light and dimensions of the object shows - try shooting against light at 45 deg; and 90 deg

Same applies to taking picture at different sun ray levels, i.e. angle of light source

SEMI-OBLIQUE OBJECT

try shooting it in front, and at back - light travels through the object it will be more transparent (通透感)

flowers, leaves, glasses, etc, all are semi-oblique; hence shooting facing the light source, i.e. the sun


 

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