![reikan focal target size reikan focal target size](https://www.bhphotovideo.com/images/images2000x2000/reikan_focal_98011_focal_large_hard_target_1194558.jpg)
So if you know the difference between accuracy and precision, they very well might be completely accurate yet completely imprecise.
#Reikan focal target size 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.Īfter 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.įoCal 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".Īssuming 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.
#Reikan focal target size manual
In any case, there are still some challenging variables in testing, including light, wind, tripod stability, battery charge, temperature, humidity, etc.ĮDIT: 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.
![reikan focal target size reikan focal target size](https://www.bhphotovideo.com/images/images2000x2000/reikan_focal_98010_focal_standard_hard_target_1194557.jpg)
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.