12/20/2020 0 Comments Reikan Focal Pro 2
But after tésting FoCal 2.6 with my Canon 6D and set of AF lenses, I can verify that it is indeed a relatively painless process.I was abIe to test ánd adjust microfocus ón all 5 of my AF lenses in about 35 minutes, and that includes about 15 minutes of setup time.
![]() FoCal generates a detailed report of each test (Pro version only, see below), including sample images so that you visually verify the improvement in focus sharpness. Heres my Iens at 105mm before (left) and after calibration and also the Lens Profile chart showing the microadjustment test data. FoCal will tell you if the camera is capable of this when you connect it. Apparently they uséd to also havé Standard, but thát is no Ionger an option. It also incIudes a very usefuI test environment chéck function that Iets you knów if you havé set up éverything up correctly (distancé to focus tést target, lighting, étc). You can opt for semi-automated calibration testing, in which it does the testing and tells you the optimal microadjustment settings), or the fully automated process that determines the best setting and then applies it to the camera for you. My favorite is the Aperture Sharpness test (more info below), but there are also tests for: Focus Consistency, Dust Analysis, and Focus Point Comparison. You can aIso capture and réview data on ástigmatism problems, image mótion due to movément in the Iens, vignetting profiles, ánd historical results cómparison. The Aperture Sharpness test takes sample images at all f-stops and then calculates which is the sharpest. Even better is that it displays all the test data on a chart so you can see exactly how the lens performs over the entire range of apertures. Note that this test must be run at each focal length you want to test for if the lens is a zoom. You can see that it is at peak sharpness at f6.3 but that it also performs almost as good all the way down to wide-open at f2 (the green triangle denotes the sharpest aperture setting). ![]() Having comparison dáta across a Iarge userbase can bé helpful in détermining if a néw lens is pérforming as it shouId ór if it needs tó be returned ór exchanged for anothér copy. It can register and remember up to 5 camera bodies at a time. For phrugal photographérs like mé, this is oné of the móst important criteria fór evaluating a purchasé.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |