So which value is best? Well, focus errors have a greater effect at the telephoto end of a zoom lens as the depth-of-field is shallower, so it’s better to shift slightly towards the telephoto end. If you calibrate at 24mm and get a result of +10 and at 70mm and get a result of +15, then any value between +1 and about +17 will almost certainly make your lens better at any focal length than it would have been at the default setting of 0. It’s easiest to explain this with a quick example… Suppose you have a 24-70mm lens. Whilst FoCal cannot address the lack of support in a camera for multiple microadjustment values, you can still calibrate a zoom lens and get a better result than uncalibrated. What you tend to find is that the ideal microadjustment values are different at each ends of the zoom range.
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How do you calibrate zoom lenses? Most cameras only support a single micro-adjustment setting for the whole lens at all zoom positions, which is not ideal.
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I have two long lenses I often use - EF 70-200mm f/2.8 L IS and EF 100-400mm L IS - and I’ve found calibrating the EF 70-200mm to be quite an interesting learning experience (at this posting I have not tested the EF 100-400mm). The challenge and question is how would FoCal handle telephoto lenses. The first lens I calibrated was the EF 50mm f/1.4 and FoCal determined after analyzing 40 or so shots that the optimum AFMA setting is -6.įoCal_FullyAuto_Canon EOS 5D Mark II_EF50mm f_1.4 USM_50mmįoCal determined my EF 100mm Macro f/2.8 Hybrid IS didn’t need any adjustment.įoCal_FullyAuto_Canon EOS 5D Mark II_EF100mm f_2.8L Macro IS USM_100mmĬalibrating prime lenses is straightforward. I didn’t have to keep getting up from my seat to reset the on-camera menu. Any change in AFMA setting previously registered by camera can be changed easily via FoCal. Here FoCal confirms the chart is correctly setup. I printed out the chart provided onto an A4 paper, mounted it on cardboard and held up the entire duration of the calibration on a boom stand. There’s also an FAQ that may contain answers to your burning questions.
Reikan focal pro discount 2014 trial#
I thank Richard of Reikan has given me an opportunity to trial and review this release (ver 1.1.0.40). For the mathematically challenged user like me there’s the Fully Automatic mode and for those who can understand numbers better there’s the Semi Automatic method. Thankfully Reikan understands this frustration and makes the calibration process much simpler. I know for sure if I had to use one of those 45° angle charts it wouldn’t take me long to smash it to pieces.
Reikan focal pro discount 2014 manual#
Goes without saying nobody likes doing this given a choice.ĪFMA capability immediately gave birth to a slew of tools that help perform manual calibration more accurately but are at best products that leave many users confused.
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Until the day Canon and Nikon began equipping dSLRs with Autofocus Microadjust (“AFMA”) capability, focus accuracy issues had been an incredibly frustrating to deal with that required returning both body and lens to respective service centre for calibration. For the latter, issues involving focus issues are a hit and miss. Sensor dust is a subject that has been talked to death and is very much an unavoidable part of living on planet earth.
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No matter what digital SLRs you own or exist today, two nagging issues continue to plague owners - sensor dust and autofocus accuracy.