As with any lens or optical product, I'm sure there is some sample variation but probably not as much as with a normal lens that has moving focus (and zoom) optical groups. PhotographyLife included commentary on this in their test: https://photographylife.com/reviews/nikon-z-1-4x-2-0x-teleconverters/4
Wezre wrote:
As with any lens or optical product, I'm sure there is some sample variation but probably not as much as with a normal lens that has moving focus (and zoom) optical groups. PhotographyLife included commentary on this in their test: https://photographylife.com/reviews/nikon-z-1-4x-2-0x-teleconverters/4
Thank you. I read their lens reviews. Didn't check the TC ones. Looks like the sample variation is not that common