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Forums > Back > New Canon EF 24-105mm f/4 USM L IS II
Brightcolours
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08-25-2016, 06:35 PM (This post was last modified: 08-25-2016, 06:43 PM by Brightcolours.)
It has to do with the optical design, that no UD is used. The design choices, probably with price.

 

Sigma does use "UD" glass in their lens:

[Image: 635-lens-construction_0.png][Image: lens-aspherical-sgv.jpg][Image: lens-fld-sgv.jpg][Image: lens-sld-sgv.jpg]

It does not "magically" make corners great:

[Image: 635_mtf-chart.gif]

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Messages In This Thread
New Canon EF 24-105mm f/4 USM L IS II - by Klaus - 08-25-2016, 10:12 AM
New Canon EF 24-105mm f/4 USM L IS II - by Reinier - 08-25-2016, 04:39 PM
New Canon EF 24-105mm f/4 USM L IS II - by Brightcolours - 08-25-2016, 06:35 PM
New Canon EF 24-105mm f/4 USM L IS II - by Rover - 08-26-2016, 10:23 AM
New Canon EF 24-105mm f/4 USM L IS II - by Klaus - 08-26-2016, 10:52 AM
New Canon EF 24-105mm f/4 USM L IS II - by Rover - 08-26-2016, 12:01 PM
New Canon EF 24-105mm f/4 USM L IS II - by Klaus - 08-26-2016, 01:19 PM
New Canon EF 24-105mm f/4 USM L IS II - by Rover - 08-26-2016, 04:13 PM

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