Objektivskolan - Ordlista - RF (Sigma)

 
Förkortningen betyder
RF = Rear Focus
 
 
Förklaring från Sigma
This lens is equipped with a system that moves the rear lens group for highspeed, silent focusing.

Conventional focusing has normallybeen performed by moving either all lens groups as a fixed unit or onlythe first lens group. AF cameras are now widely used, even for close-upphotography. Consequently, demand has arisen for a focusing system thatwill keep the length of the lens unchanged while showing little fluctuationof aberration. In response to this demand, SIGMA has developed a newinner focus system that moves two lens groups inside the telephoto andtelephoto MACRO lenses. This system has floating elements thatsubstantially improve the close-upcapability of the lens. The superwide angle lens having a large front-lens uses a rear focusing system tomove the rear-lens apparatus andenhance the floating effect, and the18-200mm F3.5-6.3 DC features aninner focusing system to move thesecondary lens group duringfocusing. This lens has a minimumfocusing distance of 45 cm / 17.7inch throughout entire zoom range.The rear focus system ensures high-speed focusing with the wide lens20mm F1.8 EX DG ASPHERICALRF.
 
 
Se exempel på berörda produkter
Sigma EX 20mm f/1,8 DG ASP RF
 
Se länkar
sigmaphoto.com
sigma-photo.co.jp




Objektiv för Canon
Nedan visas några populära alternativ (se alla)
Canon EF 28mm f/2,8 IS USM Canon EF 28mm f/2,8 IS USM
Canon EF 8-15mm f/4 L USM Fisheye Canon EF 8-15mm f/4 L USM Fisheye
Canon EF 17-40mm f/4 L USM Canon EF 17-40mm f/4 L USM
Canon EF 85mm f/1,8 USM Canon EF 85mm f/1,8 USM
 
 

Objektiv för Nikon
Nedan visas några populära alternativ (se alla)
Sigma EX 10mm f/2,8 DC HSM Fisheye Sigma EX 10mm f/2,8 DC HSM Fisheye
Sigma EX 28mm f/1,8 DG ASP Macro Sigma EX 28mm f/1,8 DG ASP Macro
Tamron SP AF 90mm f/2,8 Di Macro (motorized) Tamron SP AF 90mm f/2,8 Di Macro (motorized)
Sigma EX 800mm f/5,6 HSM APO DG Sigma EX 800mm f/5,6 HSM APO DG
 
 

Objektivskolan
Våra artiklar utbildar dig (se alla)
Ett objektiv blir till
Objektivets anatomi
Vilken betydelse har autofokusmotor?
Köpa nytt eller begagnat?
Se objektiv för just din kamera
Nedan visas några modeller (se alla)
Canon EOS 5D
Canon EOS 200D
Nikon D80
Canon EOS 1Ds

Nyheter
Nikon AF-S 600mm f/4 E FL ED VR

Nikon AF-S 600mm f/4 E FL ED VR
Nikon AF-S 500mm f/4 E FL ED VR

Nikon AF-S 500mm f/4 E FL ED VR

Två populära objektiv du inte får missa
Nikon AF-S DX 18-200mm f/3,5-5,6 G IF-ED VR II

Nikon AF-S DX 18-200mm f/3,5-5,6 G IF-ED VR II
Canon EF 400mm f/5,6 L USM

Canon EF 400mm f/5,6 L USM

Senast besökta objektiv
Nikon AF-S 600mm f/4 D IF-ED II

Nikon AF-S 600mm f/4 D IF-ED II
Canon EF 100mm f/2,8 L IS USM Macro

Canon EF 100mm f/2,8 L IS USM Macro

Senast besökta kameror
Canon EOS 200D

Canon EOS 200D
Nikon D3

Nikon D3
Nikon D3500

Nikon D3500








Copyright © Objektivguiden 2020 Om Objektivguiden