Canon EF 16-35mm pro lenses
introduction
the very average image quality Canon EF 16-35mm f/2.8L version II was introduced in 2007 this has been updated in Dec 2016 with a mark III version which is sharper wide open at 16mm and with less CA and the 9 blades give much better sunstars but otherwise fairly similar at other focal lengths
compared to the 16-135mm f/2.8L II lens, the newer Canon EF 16-35mm f/4 L IS is:
sharper edge-to-edge
less expensive
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specs
Canon EF 16-35mm f/2.8L III USM
announced Dec 2016
Fully weather-sealed construction
Sub-wavelength Coatings (SWC) and Air Sphere Coatings (ASC) to eliminate lens flare and ghosting
Two large-diameter double-surface GMo lenses plus a ground aspherical lens to help decrease distortion, curvature of field and astigmatism
Two UD lenses help to reduce chromatic aberration
9 rounded blades not 7
790g (up from 635g in mark II)
128 x 89mm
EW-88D lens hood
$US2199
reviews
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sharpness wide open highest at 16mm (much better than mark II) but 2.6EV vignetting in corners and 2.7% x 0.9% barrel distortion, but lateral CA well controlled and much better than the version II lens
at 28-35mm need f/5.6 for maximal sharpness and at these focal lengths, the distortion is pincushion, and the sharpness is only minimally better that the mark II lens
distortion similar to mark II lens but simple and easily correctable
Canon EF 16-35mm f/4L
announced 2014
“by far the best ever from Canon for nature, landscape, interior, real estate, general architecture and outdoor photography”
1)
16-35mm zoom
f/4-f/22
weathersealed
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close focus to 28cm
9 curved blades
16 elements / 12 groups
flourine coatings
77mm filter
112.8 x 82.8 mm
617 g
Canon EF 16-35mm f/2.8L II
16-35mm f/2.8L II compared to the Olympus mZD 7-14mm f/2.8 zoom lens
reviews
16-35mm f/4L IS
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nicely controlled coma correction, better than the Nikon 16-35mm f/4G VR
astigmatism well controlled at 2.9%
16-25mm f/2.8L II