It's funny to watch progress march on in the field of cameras. Camera makers are learning how to get more and more profit from less and less expensive-to-manufacture cameras while using the lure of "newest" to hook generations raised on the worship of technology. Pull apart a mirrorless camera like the A7Riii and you'll be amazed at just how few parts reside in the actual body. There are very few moving parts, beyond the shutter mechanism, and even the shutters are drop in modules made in bulk by companies like Seiko. Linkages that required mechanical sophistication and precise assemble have been distilled out of the process and replaced by software (not that eliminating parts is at all bad!). Lens design is following along. Lens makers can choose different design compromises than they have ever been able to before because they can use software to fix heavy vignetting or vast amounts of geometric distortion. As megapixel counts climb one of the benefits
