05-16-2022, 03:00 PM
(This post was last modified: 05-16-2022, 03:03 PM by davidmanze.)
We talked very briefly about Nikon's use of phase fresnel optics in the new AF-S 800mm F6.3 VR PF lens (and of course the 500mm F5.6 PF/300mm F4 PF lenses) ....... then BC mentioned the similar principles used in Canon's DO lenses .......
While reading a thread on the aforesaid 800mm PF lens someone posted a link to the Lenstip review of the 300mm F4 VR PF lens where they pointed out the differences between Nikon's refractive optics and Canon's diffractive designs ......
Clearly they are different approaches to a similar end result .....
Lenstip goes some of the way to an explanation here:
https://www.lenstip.com/index.html?test=...est_ob=431
.. has anyone an understanding of these two principles ........ BC ... Klaus.... Marcus ??
While reading a thread on the aforesaid 800mm PF lens someone posted a link to the Lenstip review of the 300mm F4 VR PF lens where they pointed out the differences between Nikon's refractive optics and Canon's diffractive designs ......
Clearly they are different approaches to a similar end result .....
Lenstip goes some of the way to an explanation here:
https://www.lenstip.com/index.html?test=...est_ob=431
.. has anyone an understanding of these two principles ........ BC ... Klaus.... Marcus ??
Dave's clichés