We all know the cheap ones. Simple mount with a really bad optic.
Is there no way at all to make or create an adapter for less than the canon telephoto original adapter at around $699
I just can't believe this is so.
I mean a simple telephoto adapter with a secondary achromatic element behind it ought to work to clean up and telephoto the image enough for an FD to EF adapter.
Is it just that difficult to get decent glass for a good price?
Overview
I am attempting to create and research an FD to EF adapter that does not have horribly unusable chromatic aberration.
Testing including