I've read the stickies and searched, but everything seems to be about the best, sharpest, clearest, greatest value for dollar, etc.
I've been interested recently in half-frame 35mm film cameras, remembering also the 110 cameras from when I was young (in the 80s) and also checking out the whole toy camera/lomo/holga scene.
So I'm wondering, after playing with the Canon EF 28-80mm 3.5-5.6 II (a kit lens on a film EOS300 from the mid-90s) what is the worst lens available?
Is there anything truly awful from the likes of Canon, Sigma, Tamron, Tokina?
The plastic lens adapters are selling for $55 or so on eBay but for a couple of dollars more there are Auto-Focus capable lenses out there.
Which have strong vignetting and poor wide-open characteristics??
(I'm guessing it's harder to make bad lenses on crop sensors because it throws away the rough edges)