Just looking for any objective opinions from you guys on the Canon 400 f/4 Diffractive Optics lens. Tried to look at photos taken with the lens, and read everything I could find about it, but there's obviously less of them out there than the 500's and 600's.
I know it came out in 2000, and didn't have a great reception because of some production issues. Supposedly those issues were remedied after 2002, but still not a ton of real world info out there.
If anyone here has owned one (version after 2002) or used one, can they weigh in with opinions, that would be great. Thanks.