Reconciling the Thick Lens Model with P2P Optical Bench

Started 4 months ago | Discussions thread
Bernard Delley Senior Member • Posts: 1,801
Re: DoF estimates

bclaff wrote:

Bernard Delley wrote:

...

The function f(s) shows a lot of variation. For example the 70-300mm zoom shown in my first post goes down from 300mm to 174mm at MFD.

I assume specifically the Nikon AF-S Nikkor 70-300mm f/4.5-5.6G VR in your gear list?

I can only see the AF-S 80-400mm f/4.5-5.6 G in my gear list. I have at least one image with the AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED in my gallery, but it is now with my daughter in law. The recently measured lens, also pictured in this thread is the AF-P 70-300mm f/4.5-5.6E ED VR.  - Sorry to say that it does not load in your optical bench simulator, when I try with my old iMac OS 10.11.6 .  On another zoom the AF-S 70-200mm f/28 G VRII I did not see how to focus to MFD (at the long end). -- It must be an admirable amount of work setting up and maintaining such a site. Bravo !

...

As I showed in a thread with illustrations gone now estimating DoF becomes more simple when calculating it from the magnification ratio, rather than from the distance. ...

Totally agree. Magnification is how I derive the equations and use DOF in the field.
It's not only focal length independent but I find estimating magnification much easier than estimating distance.

Regards

 Bernard Delley's gear list:Bernard Delley's gear list
Nikon D7200 Nikon D500 Nikon D850 Nikon AF-S Nikkor 14-24mm f/2.8G ED Nikon AF-S Micro-Nikkor 60mm F2.8G ED +10 more
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