School - Dictionary - SD (Tokina)

 
The abbreviations means
SD = Super Low Dispersion
 
 
Explanation from Tokina
When standard optical glass is used in telephoto lenses, a phenomenon called chromatic aberration can occur. Chromatic aberration is the inherent tendency for glass to disperse (separate) a ray of light into the colors of the rainbow. The rainbow effect created by a glass prism is the most dramatic demonstration of chromatic aberration. In lenses, it is much less pronounced, but still creates slightly out of focus colors, akin to an “optical noise” that has a negative impact on the quality of the picture. To eliminate chromatic aberration, Tokina employs expensive, special glass material having super- low dispersion (SD) properties.

Lenses in the Tokina line-up with the SD mark incorporate these Super-Low Dispersion glass elements, minimizing the secondary spectrum or optical noise caused by chromatic aberration.
 
 
See examples of effected products
Tokina AT-X 16-28mm f/2,8 PRO FX
Tokina AT-X Pro 16-50mm f/2,8 DX
 
See links
tokinalens.com




Top list
Our four most popular lenses (see all)
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
Follow us on Facebook
Through our Faceboook group you will recieve news regarding everything that concerns camera lenses and Lensora.

Lenses for Canon
Here are a few popular alternatives (see all)
Sigma 28-300mm f/3,5-6,3 DG Macro Sigma 28-300mm f/3,5-6,3 DG Macro
Canon EF 24-70mm f/2,8 L USM Canon EF 24-70mm f/2,8 L USM
Canon EF 500mm f/4 L IS USM Canon EF 500mm f/4 L IS USM
Canon EF-S 17-55mm f/2,8 IS USM Canon EF-S 17-55mm f/2,8 IS USM
School
Our articles will educate you (see all)
See pictures taken with a certain focal length
Protect your lens with a filter
A lens is born
The anatomy of a lens

Lenses for Nikon
Here are a few popular alternatives (see all)
Nikon AF-S 35mm f/1,4 G Nikon AF-S 35mm f/1,4 G
Sigma 70-300mm f/4-5,6 DG APO Macro Sigma 70-300mm f/4-5,6 DG APO Macro
Nikon AF-S 58mm f/1,4 G Nikon AF-S 58mm f/1,4 G
Nikon AF-S DX 18-105mm f/3,5-5,6 G ED VR Nikon AF-S DX 18-105mm f/3,5-5,6 G ED VR
See lenses for your camera
Below you will find some models (see all)
Canon EOS 1300D
Canon EOS 750D
Canon EOS 6D
Nikon Df

Newly added lenses
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)

Three popular lenses to look at
Canon EF 35mm f/2 IS USM

Canon EF 35mm f/2 IS USM
Canon EF 35mm f/1,4 L USM

Canon EF 35mm f/1,4 L USM
Nikon AF 14mm f/2,8 D ED

Nikon AF 14mm f/2,8 D ED

Recently visited lenses
Sigma EX 120-300mm f/2,8 APO DG HSM

Sigma EX 120-300mm f/2,8 APO DG HSM
Nikon AF-S DX 55-300mm f/4,5-5,6 G ED VR

Nikon AF-S DX 55-300mm f/4,5-5,6 G ED VR
Nikon AF-S 58mm f/1,4 G

Nikon AF-S 58mm f/1,4 G

Recently visited cameras
Nikon D3100

Nikon D3100
Canon EOS 5DS

Canon EOS 5DS
Nikon D5100

Nikon D5100
Nikon D600

Nikon D600





Quick Search
 
 
What others are watching
 
Love is in the air?
 
Follow us on Facebook
 
News on Lensora