Don’t miss out! Explore our other sites:
Cameraby  |  GoLenso (multilingual)
Best regards, Henrik – founder of Objektivguiden

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)
Sigma EX 24mm f/1,8 DG ASP Macro Sigma EX 24mm f/1,8 DG ASP Macro
Sigma EX 180mm f/2,8 HSM OS DG Macro Sigma EX 180mm f/2,8 HSM OS DG Macro
Canon EF 24-70mm f/4 L IS USM Canon EF 24-70mm f/4 L IS USM
Canon EF 35mm f/1,4 L USM Canon EF 35mm f/1,4 L USM
 
 

Objektiv för Nikon
Nedan visas några populära alternativ (se alla)
Nikon AF-S DX 85mm f/3,5 G ED Micro VR Nikon AF-S DX 85mm f/3,5 G ED Micro VR
Nikon AF-S 24-70mm f/2,8 E ED VR Nikon AF-S 24-70mm f/2,8 E ED VR
Nikon AF-S 800mm f/5,6 E FL ED VR Nikon AF-S 800mm f/5,6 E FL ED VR
Nikon AF-S DX 16-85mm f/3,5-5,6 G ED VR Nikon AF-S DX 16-85mm f/3,5-5,6 G ED VR
 
 

Objektivskolan
Våra artiklar utbildar dig (se alla)
Köpa nytt eller begagnat?
Vilken betydelse har autofokusmotor?
Brännvidd och exempelbilder
Kameran kan påverka brännvidd
Se objektiv för just din kamera
Nedan visas några modeller (se alla)
Canon EOS 400D
Canon EOS 1D Mark II
Canon EOS 300D
Canon EOS 5D Mark III

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
Canon EF 300mm f/4 L IS USM

Canon EF 300mm f/4 L IS USM
Tamron AF 70-200/2,8 LD IF Di Macro

Tamron AF 70-200/2,8 LD IF Di Macro

Senast besökta objektiv
Tokina AT-X 535 PRO DX AF 50-135mm f/2,8

Tokina AT-X 535 PRO DX AF 50-135mm f/2,8
Nikon AF-S DX 18-55mm f/3,5-5,6 G ED VR

Nikon AF-S DX 18-55mm f/3,5-5,6 G ED VR

Senast besökta kameror
Nikon D7000

Nikon D7000
Canon EOS 350D

Canon EOS 350D
Canon EOS 450D

Canon EOS 450D





Sites in our network
Please visit and bookmark:
Cameraby.com
GoLenso.com
Lensora.com
 
Snabbsök
 
 
Andra tittar på det här
 
Kärlek
 
Nyinkommet på Objektivguiden




Copyright © Objektivguiden 2020 Om Objektivguiden