Re: Official: Fujifilm GFX 50S Medium Format Announced!
rbf_ wrote: RustyBug wrote:
The flange distance is not the location of the physical aperture (where diffraction is induced). That, and lens design (too much weeds) does have an influence (probably regarding exit pupil distance) ... but that\'s getting a bit deeper than my crude math works for.
I don\'t personally feel anyone has fully reconciled the crude math so don\'t feel bad
Oh, I\'ve done it years ago (physics / optics experiments in both diffraction and optical projection design math) and had to fully reconcile it (my teacher and his twin brother were former night vision physicists for the Pentagon) to the nth degree. My brain just doesn\'t want to work that hard anymore (and my memory is highly diffracted )... so I just use the crude (conceptual) math instead.
Re: Official: Fujifilm GFX 50S Medium Format Announced!
rbf_ wrote: RustyBug wrote:
The flange distance is not the location of the physical aperture (where diffraction is induced). That, and lens design (too much weeds) does have an influence (probably regarding exit pupil distance) ... but that\'s getting a bit deeper than my crude math works for.
I don\'t personally feel anyone has fully reconciled the crude math so don\'t feel bad
Oh, I\'ve done it years ago (physics / optics experiments in both diffraction and optical projection design math) and had to fully reconcile it (my teacher and his twin brother were former night vision physicists for the Pentagon) to the nth degree. My brain just doesn\'t want to work that hard anymore (and my memory is highly diffracted )... so I just use the crude math instead.
Re: Official: Fujifilm GFX 50S Medium Format Announced!
rbf_ wrote: RustyBug wrote:
The flange distance is not the location of the physical aperture (where diffraction is induced). That, and lens design (too much weeds) does have an influence (probably regarding exit pupil distance) ... but that\'s getting a bit deeper than my crude math works for.
I don\'t personally feel anyone has fully reconciled the crude math so don\'t feel bad
Oh, I\'ve done it years ago (physics / optics experiments in school) and had to fully reconcile it (my teacher and his twin brother were former night vision physicists for the Pentagon) to the nth degree. My brain just doesn\'t want to work that hard anymore ... so I just use the crude math instead.
Re: Official: Fujifilm GFX 50S Medium Format Announced!
rbf_ wrote: RustyBug wrote:
The flange distance is not the location of the physical aperture (where diffraction is induced). That, and lens design (too much weeds) does have an influence (probably regarding exit pupil distance) ... but that\'s getting a bit deeper than my crude math works for.
I don\'t personally feel anyone has fully reconciled the crude math so don\'t feel bad
Oh, I\'ve done it years ago (physics / optics experiments in school) and had to fully reconcile it (my teacher was a former night vision physicist for the Pentagon) to the nth degree. My brain just doesn\'t want to work that hard anymore ... so I just use the crude math instead.
Sep 20, 2016 at 11:30 PM
Previous versions of RustyBug's message #13733321 « Pre-order: Fujifilm GFX 50S Medium Format body ($6,499) »
)... so I just use the crude (conceptual) math instead.