LENS CONTROL WORKSHOP

today i attended John's lens control workshop.

Focal length is how far away subject is to the sensor, within the lenses there are elements which are for colour and tonal balance.

FIXED LENS - elements within housing are fixed and don't move.

ZOOM LENS - elements within housing move to zoom in and out.


Typical focal lengths are:-

• 15mm, 24mm, 28mm are wide focal lengths


• 35mm, 50mm, 85mm are standard focal lengths


• 135mm, 200mm are telephoto focal lengths


• 400mm, 800mm are extreme telephoto focal lengths

standard (same perspective) lens for a DSLR is a 28mm. we exaggerate perspective if we move from a standard to a telephoto lens.

WIDE ANGLE LENS

• more coverage


• exaggerate perspective

TELEPHOTO LENS

• subject closer


• flatten perspective


• less coverage

*Telephoto lenses are best for portrait photography*

wide angle lenses are typically used for landscape.

*WHEN USING A TRIPOD THE IMAGE STABILISER ON CAMERA SHOULD BE TURNED OFF*

135mm lens with soft focus connector is very good for portraits, portraits should also be shot using a shallow depth of field.

depth of field website - http://www.dofmaster.com/

SHALLOW DEPTH OF FIELD - F2.8, F4, F5.6,

DEEP DEPTH OF FIELD - F11, F16, F22

Aperture (F number) controls depth of field and intensity of light.

depth of field is distributed 1/3 towards the camera and 2/3 away from the camera.