Hi Andrew,
Thanks for the link, good info, so I could see how using a spyder with higher delta E could kind of 'sabotage' the whole point of hardware calibration.
Can I throw another related question your way, I have noticed if I use the display cal software, there is an option called 'import colorimeter correction', it has an option for spyder's and some x-rite products, what you do is select the install package file for your product (such as the spyder 4 software which can be downloaded from the manufacture website), and displaycal will pull some kind of 'correction factor' out of that. I would like to know what this correction doing and why. Because I wonder then if you use different software with the spyder (or any other device) does it's output always then need a correction applied to get the correct reading, and how that affects any other software that uses these devices, such as easypix, colour navigator, nec spectraview, or anything else. And is this correction a general correction for the equipment, or if it is somehow an individual correction for each device.
Thanks,
John