I have just purchased a P65 DB which is my experience of MF digital.
Looking at the LCC images I have taken I am seeing a slight artefact
In the image. A checker board effect roughly in 6 segments split down
the middle of portrait format image. Although very slight it is visible
though I doubt if it could be seen on an actual image.
I can't find a previous thread covering this, I would like to know more.
Do you see it in capture one v7.1.2 or in third party software?
Are you using a tech/view camera or SLR?
Is the line visible before adjusting the image or only after severe adjustment (e.g. an s-curve+curves+levels)?
A correctly calibrated and properly functioning back will not show any such lines if:
- viewed in up-to-date capture one
- using supported lenses (e.g. not Schneider 24XL)
- reasonable photographic adjustments
- running up-to-date firmware
If using third party software it's even more important to make sure you are up to date since some of the early implementations of support in LR and ACR were especially poor/ugly. You'll most likely find capture one does a better job of rendering the phase files anyway, but to each his own.
It is rare, but possible, for a back to be out of calibration. If in warranty, or if recently purchased from a dealer then this would be a free service. If out of warranty and purchased privately it would be a paid service, so if you've just purchased this back used from a private individual you'll want to figure out if you're in calibration ASAP so you can return it (or negotiate for the seller to pay for the required service). If you bought from a good dealer the back would have been tested for calibration prior to sale (at least we do this, I assume other good dealers do as well) but just call them and they'll take care of you (including helping you determine it you have a problem in the first place).