You can use the moiré method below to see if your camera is focusing properly with each of your lenses, but if one is out, there is little you can do about it. Now was it the lens or the body that was at fault? I don’t know but it most likely was this particular combination that resulted in less-than-stellar performance. This experience drove me to discover MFA and MFA made this lens perfect. Out of the box, my heart sunk when I saw the soft images coming from this very expensive lens. I had a few lenses that were noticeably out of focus and one that was very much out is one of Canon’s highest rated “L” lenses. Not all camera bodies have this feature but they all should. Unless of course the manufacturers improved their quality assurance processes and manufacturing specs tight enough so that it no longer matters. After owning a few different bodies, using bunch of different lenses, and shooting for a few years, I will never buy a camera without this MFA capability.
yes even this is not perfect but it does work and works very well. This MFA system allows you to adjust for each lens you own thus tuning each one to your body perfectly…. Well the camera manufactures put a cool feature in into some of their camera bodies that Canon calls Micro Focus Adjustment (MFA) to adjust for these variances. In other words, each of the many pieces in your camera involved in focusing vary ever so slightly from one another and when put together as a system, the variances in total may result in less than perfect focusing.
This is most likely due to manufacturing tolerances not being as tight as they should be. Sorry, this is gonna hurt.Īs amazing as our auto focus systems are, they can be slightly off. Grab some beer, turn on some tunes (I recommend Jazz/Samba such as Stan Getz), and block out some time.
Update: See my new piece on MFA using my new, FREE TTP Align Ruler, just click here! (It just may be better than moiré.) These two systems receive light via separate optical pathways, which means that focus inaccuracies can arise when the AF sensor and imaging sensor function under slightly different parameters.Getting Sharp Focus – Micro Focus Adjustment – You Need This!!! This is because the AF system of a DSLR is typically housed at the base of the body, while the imaging sensor sits at the heart of it.
Sometimes, there is a discrepancy between the AF system and the camera's sensor. While it can be frustrating, it's not always down to user error. Despite knowing you aimed for your subject's eye and the camera beeped to signal correct focus had been achieved, the only thing sharp is the tip of your subject's nose. The legendary Ansel Adams once said: ‘There is nothing worse than a sharp image of a fuzzy concept' While there is a lot of truth to this statement, many of you will have had times when you've nailed a great moment, only to notice on review that your focus was off.
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