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Sigma (AF and MF) 400mm F5.6 APO v2, 1988 Review RSS Feed

Sigma (AF and MF) 400mm F5.6 APO v2, 1988

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0 6,078 Fri April 28, 2017
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Sigma (AF and MF) 400mm F5.6 APO v2, 1988

Sigma (AF and MF) 400mm F5.6 APO v2, 1988
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Sigma (AF and MF) 400mm F5.6 APO v2, 1988
supersize
Sigma (AF and MF) 400mm F5.6 APO v2, 1988
supersize
Sigma (AF and MF) 400mm F5.6 APO v2, 1988
supersize
Sigma (AF and MF) 400mm F5.6 APO v2, 1988
supersize
Sigma (AF and MF) 400mm F5.6 APO v2, 1988
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Description:
This is the second apo version 400mm, launched 1988. The first was released in 1982 and was a 7 elements in 5 groups optical construction (link to pic). This compact 400mm is in size and structure the same as the optically simpler non-APO 400mm MC version listed here and is the most commonly available sigma 400mm apo. Visually the difference between the AF version (pic 1) and the MF version is the focus barrel which larger on the MF version (most af ones are for canon). Pics 3, 4 show an MF example with OM mount and the "zen" finish from the 1990's, notorious for becoming sticky. This can be cleaned off with eg meths.
More importantly than deteriorating paint, these are known to be vulnerable to cemented groups becoming hazed - avoid, can't be fixed. Pic 5 shows the front objective from a bad one. More commonly it's a speckled hazing of an interior group, pic 6, which, if it's not bad, has only a minimal effect on image quality.
Note the separate listings for the non "apo" 400's, eg here, and the later 1995 AF version 3 is listed here.

Description on sigma-imaging-uk.com history pages :
"To minimize the colour aberration, which is the inherent problem of ultra telephoto lens, this lens is using 2 ultra low dispersion glasses in the front lens group. To have high speed AF mode and avoid heavy load to the AF motor, it incorporates inner focusing system. In addition, with a floating lens element system, it will produce high contrast and sharp image in entire focusing range from infinity to closest distance of 4 meters. It is a lightweight, compact, ease to use, high performance ultra APO telephoto lens."
Can be found as PKA mount (and ?? KAF mount a few later ones) for pentax.

Construction 11 Elements in 8 Groups
Focal Length 400mm
Maximum Aperture 5.6
Minimum Aperture 22
Field of View (24x36) 6
Minimum Focus Distance 400cm
Number of blades 6
Maximum Magnification 1:9.5
Filter Size 72mm
Diameter 85mm (max.)
Length 213.5mm
Weight 1,100g

Detailed review with crops (nikon) by Dr Carlo Kopp

This web page by Pete Ganzel illustrates disassembly of the lens.
Mount Type: Pentax KA


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