Objektivskolan - Ordlista - IF (Tamron)

Förkortningen betyder

IF = Internal Focusing System

Förklaring från Tamron

Internal focusing (IF) provides numerous practical benefits to photographers including a non-rotating front filter ring that facilitates the positioning of polarizing and graduated filters, and more predictable handling because the lens length does not change during focusing. Even more important, Tamron’s Internal Focusing (IF) system provides a much closer minimum focusing distance (MFD) throughout its entire focusing range. In addition, IF improves optical performance by minimizing illumination loss at the corners of the image field, and helps to suppress other aberrations that become more troublesome at different focusing positions.

Se exempel på berörda produkter

	Tamron SP AF 17-50mm f/2,8 XR Di-II LD Asph IF
	Tamron SP 200-500mm f/5-6,3 Di LD IF
	Tamron SP AF 180mm f/3,5 Di LD IF Macro

Se länkar

tamron-usa.com

Objektiv för Canon
Nedan visas några populära alternativ (se alla)
	Canon EF-S 10-22mm f/3,5-4,5 USM
	Sigma EX 120-300mm f/2,8 DG OS APO HSM
	Canon EF 200-400mm f/4 IS L
	Tokina AT-X Pro 12-24mm f/4 DX II

Objektiv för Nikon
Nedan visas några populära alternativ (se alla)
	Sigma 50-200mm f/4-5,6 DC OS HSM
	Nikon AF-S 600mm f/4 G ED VR
	Nikon AF-S 24-85mm f/3,5-4,5 G ED VR
	Sigma EX 300mm f/2,8 APO DG HSM