Nikon 20 1.8 MTF.Spherochromatism performance topSpherochromatism, sometimes mistakenly called "color bokeh" by laymen, is a minor aberration which can add slight color fringes to out-of focus highlights.It has some at close distances wide open. Background highlights might have slight green ...
It's always sharp corner-to-corner, just with less contrast in the corners at f/2.8 if you're doing astronomy. Of course the physics of diffraction limit everything at the very smallest apertures, "corrected" or not.Nikon's MTF chart....
Nikon 300mm PF MTF.Sunstars performance topWith its rounded diaphragm, the 300/4 PF rarely makes any kid of sunstars on brilliant points of light. Here's the best I can get, and this is at f/32:Yosemite National Park, 16 May 2015, f/32.Vibration Reduction (VR) performance top...
The quality of modern electron microscopes, such as SEM, STEM, and TEM, has greatly improved. However, the quality of the experimental images produced by these instruments is often compromised by stochastic and deterministic distortions arising from the instrument or its environment1,2,3. These dis...
Furthermore, we found that the general shape of MTFr can be expressed parametrically as: MTFr ¼ aeÀ2gb22 þ ð1 À aÞeÀ2gc22 ; (29) where a, b and c are positive real numbers. These numbers were randomly generated until they fulfilled the constraint that on a numerical...
The error still appears after Flash player is uninstalled. If we make the user an administrator this fixes the issue but once they are set back to a user the error returns I have posted the log below from the command I ran that fixed the issue as...
and real strain, with a constant outward shift of about 5%. He also demonstrated that the true positions of atomic columns at the surface could be determined within 0.2 Å, corresponding to 5% of the lattice parameter of gold. This investigation was done before the invention of the spherical...
Enhanced images from a bar target show better MTF and MRTDcurves after HR software processing than before. In addition, lower spatial and temporal noises were obtained as anadditional benefit of the algorithm.J. SadiA. CrastesLIGHTNICS - 177b avenue Louis Lumiere - 34400 Lunel - France; ULIS...
Electronically controlled for quieter operation, but isn't compatible with cameras made before about 2007.Vibration ReductionRated an astounding 4½ stops.Coverage35mm film, FX and DX.Focal Length200 ~ 500mm.When used on a DX camera, it sees angles of view similar to what a 300 ~ 750mm ...
I used an image the crescent of the eclipsed sun and dropped on top of a shot of a glorious sunrise. I had planned to do this even before I shot the eclipse, since I realized the eclipse would be up in the sky at 9:22 AM and not make for much of an image by itself....