What is APO and What are the real APO lenses on the market?

Started Jan 9, 2013 | Questions thread
ForumParentFirstPreviousNextNext unread
Flat view
Mssimo
Contributing MemberPosts: 883Gear list
Like?
What is APO and What are the real APO lenses on the market?
Jan 9, 2013

What is APO and why is it so good?

What are the real DSLR APO lenses on the market. Any canon or nikon. Any fake APO claims?

The only one I know of is the new Zeiss Apo Sonnar T* 2/135

From Zeiss:

Lens made of special glass with anomalous partial dispersion

Apochromat

Because this lens is an apochromat, chromatic aberrations (axial chromatic aberations) are corrected with elements of special glass with anomalous partial dispersion. The chromatic aberrations are therefore significantly below the defined limits. Bright-dark transitions in the image, and especially highlights, are reproduced almost completely free of color artifacts.

From Wikipedia:

Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus in the same plane. Apochromatic lenses are designed to bring three wavelengths (typically red, green, and blue) into focus in the same plane.[1] The residual color error (secondary spectrum) can be up to an order of magnitude less than for an achromatic lens of equivalent aperture and focal length. Apochromats are also corrected for spherical aberration at two wavelengths, rather than one as in an achromat.

-- hide signature --
 Mssimo's gear list:Mssimo's gear list
Nikon D800E Nikon AF-S Nikkor 50mm f/1.4G Nikon AF-S Nikkor 70-200mm f/2.8G ED VR II Nikon AF-S Nikkor 300mm f/2.8G ED VR II Sigma 8mm F3.5 EX DG Circular Fisheye +3 more
ANSWER:
This question has not been answered yet.
ForumParentFirstPreviousNextNext unread
Flat view
ForumParentFirstPreviousNextNext unread
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow