EF EF-S ? confussion

[neuroanatomist]

All other manufacturers have had no problem creating APS-c lenses that fit without hitting the mirror.The most prominent is Nikon.

Right. Nikon is just the king of lens compatibility. Which kind of metering will work with that lens? Is the autofocus in the body or the lens? An autofocus G lens - does that work on a D5000? Thank goodness there are about 50 different compatibility charts on the Internet, including Nikon's own charts for each camera model - most of which have 6-10 footnotes - because they make the situation so much easier to understand. Yes, the Nikkorautofocus G lens doeswork on a D5000, but it only manually focuses. Yikes.

There are also 3rd party manufacturers that make reduced image circle lenses which do not protrude into the camera and fit on Canon full frame cameras as well as crop cameras.


Canon's poor decision has plagued people with confusion and prevented the use of nice lenses like the 17-55mm IS on other canon models like the 1.3 crop. Sure, they would viginette, but I'd still prefer that they fit.

You can add a thin non-Canon extension tube and use an EF-S lens on an FF body. Or use a 3rd party reduced image circle lens. Canon has decided not to allow branded combinations that produce images like this. That's their choice. There are workarounds, if you choose to go that route.