Objektivskolan - Ordlista - USD (Tamron)

 
Förkortningen betyder
USD = Ultra Sonic Drive
 
 
Förklaring från Tamron
Tamron’s USD works with the high-frequency ultrasonic vibrations that are produced by a ring called a ‘stator’. Energy from the vibrations is used to rotate an attached metallic ring known as the ‘rotor’. Piezoelectric ceramic, an element that produces ultrasonic vibrations when voltage of a specific frequency is applied is arranged in a ring formation on the stator. This electrode configuration of piezoelectric ceramic causes two ultrasonic vibrations to occur in the stator.
By effectively combining these two ultrasonic vibrations, it is possible to convert the energy from the vibrations that produced simple motion into energy known as ‘deflective traveling waves’, which then moves around the circumference (rotation direction) of the ring.
With the USD, the friction between these deflective traveling waves created on the metallic surface of the stator and the surface of the rotor produce force, causing the rotor to rotate. The focusing ring lens, which is linked to the rotor, is thus moved, creating a fast and smooth auto-focus drive.
 
Se länkar
tamron-usa.com




Topplistan
Våra fyra mest populära objektiv (se alla)
Tamron AF SP 70-300mm f/4-5,6 Di VC USD Tamron AF SP 70-300mm f/4-5,6 Di VC USD
Canon EF-S 55-250mm f/4-5,6 IS II Canon EF-S 55-250mm f/4-5,6 IS II
Tamron AF 18-270mm f/3,5-6,3 Di II VC PZD Tamron AF 18-270mm f/3,5-6,3 Di II VC PZD
Nikon AF-S DX 35mm f/1,8 G Nikon AF-S DX 35mm f/1,8 G
Följ oss på Facebook
Via vår Facebook-grupp får du nyheter om allt som rör objektiv i allmänhet och Objektivguiden i synnerhet.

Objektiv för Canon
Nedan visas några populära alternativ (se alla)
Sigma EX 50-150mm f/2,8 II DC APO HSM Sigma EX 50-150mm f/2,8 II DC APO HSM
Canon EF-S 18-135mm f/3,5-5,6 IS STM Canon EF-S 18-135mm f/3,5-5,6 IS STM
Canon EF-S 17-55mm f/2,8 IS USM Canon EF-S 17-55mm f/2,8 IS USM
Canon EF 15mm f/2,8 Fisheye Canon EF 15mm f/2,8 Fisheye
Objektivskolan
Våra artiklar utbildar dig (se alla)
Skydda ditt objektiv med ett filter
Kameran kan påverka brännvidd
Ett objektiv blir till
Att rengöra ett objektiv

Objektiv för Nikon
Nedan visas några populära alternativ (se alla)
Nikon AF-S 500mm f/4 G ED VR Nikon AF-S 500mm f/4 G ED VR
Nikon AF 80-400mm f/4,5-5,6 D VR Nikon AF 80-400mm f/4,5-5,6 D VR
Sigma 18-200mm f/3,5-6,3 II DC OS HSM Sigma 18-200mm f/3,5-6,3 II DC OS HSM
Sigma EX 150mm f/2,8 DG OS HSM APO Macro Sigma EX 150mm f/2,8 DG OS HSM APO Macro
Se objektiv för just din kamera
Nedan visas några modeller (se alla)
Canon EOS 7D
Canon EOS 1Ds
Nikon D5000
Canon EOS 5D Mark IV

Nyheter
Nikon AF-S 400mm f/2,8 E FL ED VR

Nikon AF-S 400mm f/2,8 E FL ED VR
Nikon AF-S DX 18-55mm f/3,5-5,6 G VR II

Nikon AF-S DX 18-55mm f/3,5-5,6 G VR II
Nikon AF-S 50mm f/1,8 G SE (Special Edition)

Nikon AF-S 50mm f/1,8 G SE (Special Edition)

Tre populära objektiv du inte får missa
Nikon AF-S 24-120mm f/4 G ED VR II

Nikon AF-S 24-120mm f/4 G ED VR II
Sigma EX 4,5mm f/2,8 DC HSM Fisheye

Sigma EX 4,5mm f/2,8 DC HSM Fisheye
Nikon AF-S 28-300mm f/3,5-5,6 G ED VR

Nikon AF-S 28-300mm f/3,5-5,6 G ED VR

Senast besökta objektiv
Sigma 28-300mm f/3,5-6,3 DG Macro

Sigma 28-300mm f/3,5-6,3 DG Macro
Tokina AT-X DX 10-17mm f/3,5-4,5 Fisheye

Tokina AT-X DX 10-17mm f/3,5-4,5 Fisheye
Nikon AF-S DX 40mm f/2,8 G Micro

Nikon AF-S DX 40mm f/2,8 G Micro

Senast besökta kameror
Canon EOS 450D

Canon EOS 450D
Canon EOS 77D

Canon EOS 77D
Nikon D3100

Nikon D3100
Nikon D700

Nikon D700








Copyright © Objektivguiden 2019 Om Objektivguiden