![aps zemax file aps zemax file](https://www.opticalsoftware.net/images/sized/images/osc/0design/winlens3dbasic1-400x213.gif)
Zemax calculates a 70% falloff, somewhat worse than Ken’s observation. Pulling these images into ImageJ, I see falloff of 55% at the corner at f/1.4. Ken reports on vignetting, reporting that it’s “visible at f/1.4, and goes away at f/2 and smaller.” He does a good job quantifying this vignetting by taking photos of a uniform grey screen. For a close object, Zemax doesn’t match this observation it shows a slightly-increased barrel distortion of -2%
Aps zemax file full#
It has minor barrel distortion at infinity and strong barrel distortion down at only 1 foot (30 cm).” For a distant object, this observation agrees with Zemax, which shows about -1.2% distortion at full field. Ken reports that the lens “has no visible distortion at moderate focus distances around 3 to 10 feet (1 to 3 meters). In Zemax, the spot diagrams don’t look particularly comatic to me, either. Ken specifically looked for coma, but didn’t see any.
![aps zemax file aps zemax file](https://www.opticalsoftware.net/images/sized/images/osc/0design/winlens3d1-400x213.gif)
However, away from full aperture and away from the very corner of the field, the footprints are quite round. At full aperture, as shown, the beam footprints would be far from round near full field. Ken’s observation can be examined in Zemax by plotting the beam footprints on the final lens surface, giving a clue about the shape of the exit pupil. Backgrounds never distract.” Good bokeh is obtained from a round exit pupil with soft edges. He finds the lens to be “an optically excellent lens.” This assessment agrees with the high MTF at full aperture, shown above in the lens specs, measurements, and Zemax model but he offers more observations.
![aps zemax file aps zemax file](https://www.mdpi.com/jimaging/jimaging-04-00137/article_deploy/html/images/jimaging-04-00137-g013.png)
![aps zemax file aps zemax file](https://europepmc.org/articles/PMC6895231/bin/41467_2019_13504_Fig2_HTML.jpg)
Aps zemax file professional#
Ken Rockwell offers a thorough review of this lens from the perspective of a professional photographer. Neither of these apertures matched the lens diameter shown in the patent figures this mismatch is perfectly reasonable because the patent didn’t claim anything about the apertures. To achieve this good match between measurements and Zemax model, I made the fourth element the limiting aperture before the stop and the last element the limiting aperture after the stop. The Zemax calculations fall in-between the falloff with field is worse than the measurements at LensRentals, but better than the Sigma specs. Falloff with field is significantly better in the LensRentals measurements than in the Sigma specs. (Note that the color coding is the same in all plots) In the Zemax file, the MTF at best axial focus matches that of the MTF measured at LensRentals and separately published by Sigma. Plots of MTF vs field from both Sigma and Lens rentals are shown below, next to the same plot for the posted Zemax file JP2014-048488_Example03P. LensRentals is quite transparent about their MTF measurements, which seem reasonably-constructed and well-implemented. For my Zemax models of MTF, I use photopic spectral weighting and sine wave modulation these values match the settings on the MTF stand at LensRentals.īoth Sigma and LensRentals offer MTF measurements. MTF is helpful in determining the actual lens diameters. Matching lens performance was a little more difficult vignetting is important to the lens performance but isn’t disclosed in the patent. Furthermore, the elements with aspheres are of moldable glass types. The patent calls out refractive index and Abbe number, not glass types however, these index and dispersion values match exactly to Hoya glass types. The “enhanced dispersion” glasses in the product literature match fairly well with the glasses with high Abbe number in the patent. Many other aspects of the two lenses also match well. ZEMAX default file extension associations Although its likely, that some file extensions may be missing from the list of associated file extensions with the application, yet they can be opened, be part of, or otherwise be associated with the program. However most, if not all directly associated file extensions should be listed with its appropriate program. The list of extensions used or otherwise associated with the application may not be complete, because many common file extensions on our website, such as jpg (pictures) or txt (text files), can be opened by a large number of applications, or are too general file format. Note: You can click on any file extension link from the list below, to view its detailed information. ZEMAX works with the following file extensions: