You may need to update the firmware on some 3rd party lenses to support newer cameras, so it is worth checking if others have used your lenses with the camera you are looking to get.
The OP was asking whether any Lens calibration is needed -the answer I believe is no.
The different focal lengths is somewhat interesting regarding Sigma lenses because of their dock system. I don't know if Tamron has this.
This is why I asked the question. Ive had the tamron 150-600 and could never get a good sharp image across the various focal lengths. They do have the Tap-In console that I tried. Similar to Sigma"s Dock. And yes it is a PITA. Just curios if all this would be eliminated with mirrorless. Leaning towards the R6. Maybe rent / borrow a Tamron lens and find out, unless someone has this combo already.
Correct, but it seems that it is a fallacy that mirror less cameras do not need calibration, I spoke to the Canon tech and said that I suspected that my R5 back focussed. He did not reply to that, just said the the camera had been recalibrated and it says in the report that the dual pixel AF had been recalibrated. He did not elaborate further. Since the sensor is in essence floating, perhaps that is the answer. I don't know.
Mirrorless does does not offer MFA so focusing directly on the sensor must eliminate it all. To confirm your AF I use'd live view which focuses on the sensor and compare that to PDAF.
I've had my 7D2 factory calibrated and they adjusted the sensor. I also had a EF 70-200 2.8 II calibrated because the MFA numbers were unacceptable to me. Fine tuning - yes. Big swings - there is a problem. I've always believed in that.
using iterative CDAF at shooting aperture != using PDAF wide open, moving focusing group of optics elements in one go and stopping down w/o checking again.. it all depends how particular dSLM model implements focusing + lens construction + sample variations .. in general you can't assume that dSLM in principle will always focus any lens w/o BF/FF, but they are a totally better world than dSLR
I was a bit confused when the RF 70-200/2.8 was first released and showed some focusing errors, which Canon later repaired by a firmware update. In this review from opticallimits.com, it's explained by RSA (Residual Spherical Abberation), or the fact that the focus plane moves backwards when the aperture closes down.
