#Reikan focal chart manual
#Reikan focal chart software

When the you half-press the shutter button to autofocus, the secondary sensor interprets the light and instructs the lens to focus in a certain way. A portion of the incoming light hits the secondary sensor, and the rest travels up through the viewfinder to your eyes. There are also mirrors that direct the light either to our eye or to the imaging sensor. In a DSLR mechanism, there are (at least) two separate sensors: one for imaging, and a secondary one for autofocusing. The first thing you need to at least vaguely understand is how autofocusing works in DSLRs. I still don't consider it worthless, though.Why Do You Need to Calibrate Your Lenses? What irritates me about FoCal is the other snake-oil stuff that pretends to give you lots more 'accurate' values that aren't even remotely that, so that is where we agree.

#Reikan focal chart manual

All FoCal does for you that you have to do yourself in the manual process is determine the relative sharpness of the shot, and I'd say it does that better than most of us do. While FoCal is only accurate when you repeat the process several times and then settle for the average of the results you got, the same is true for the manual process, as well. What's your heartburn with FoCal? It essentially takes the same approach most of us do who fine tune AF manually. In photography precision seems more important than accuracy, since the latter can be adjusted for, while the former is a wild card. So if you know the difference between accuracy and precision, they very well might be completely accurate yet completely imprecise.

#Reikan focal chart software

I was not told what sort of normalization is being done, but was told that the only chart that changes the reference data is the aperture sharpness test, while focus consistency and auto focus fine tune display unnormalized reference data.ДЄfter killing tons of time with Reikan software and constantly getting different results I came to the conclusion that they are essentially worthless due to lack of reproducibility/consistency. My guess is distance matters, since the unit is lp / m. My original concern was not the consistency of my data, but the consistency of the reference data, but that has been clarified. Same test with my D850 does not show one due to lack of reference data. The background shows a red/blue/green overlay which is the reference data. My first sentence stated which lens I am using? Guess the software sells better with all that crap, but that does not make it any more accurate.ДЇoCal is great for what it does well, though - AF fine-tuning. I own FoCal, as well, and have come to completely ignore all the 'pseudo data' it gives me except for the AFFT info. Accurately measuring the exact point where your lens is the sharpest takes a lot more precision equipment than the relatively crude method FoCal and its competitors use. I see no red/yellow/green overlays whatsoever in your charts, so I assume the answer is 'no reference data available'.ДЄssuming these are three runs with the same lens, I'd say the consistency is pretty decent. You're not telling us which lens you use, so not sure whether reference data even exists. Apparently, it doesn't change focus during the test. In any case, there are still some challenging variables in testing, including light, wind, tripod stability, battery charge, temperature, humidity, etc.Д®DIT: The Reikan FoCal manual doesn't specify a target distance, however it does say that the camera has to be focused on the target prior to starting the test. The second set of tests showed a sharpness profile that closely matched my experience with the lens. When I went back for the second round of autofocus fine tuning, I checked aperture sharpness again, but this time I ran the test for each focal length at the minimum target distance that Reikan recommends. It was puzzling, because the lens is perfectly fine when I'm taking photos with it. According to the charts, the lens should have been from the bottom of the reject pile at three of the focal lengths a complete dog. Recently, I was autofocus fine tuning a new lens using Reikan FoCal and also checked aperture sharpness at four focal lengths. camera body and lens) and which variables do they ignore (i.e. When the Reikan software displays reference data from other users, which variables do they match (i.e. I'm also curious to know the answer to this question.