yes it's a little noisy, but it's perfectly usable and gives great results

But really, it does produce gorgeous results.

The results are very reasonably sharp with just a hint of chromatic aberration

The final result is beautiful, you will throw away the pictures that are out of focus, but the ones that remain will be really good

attached to my Kit lens and even the 50 MM with decent results,

It is NOT aimed at the "L Series" buyers so don't expect that insane crystal clear result but the images are plenty clear

With the F2 aperture, I was able to get great results on my Canon

amazing results

The lens does include a front and rear cap (the lens cap being a nice E-52II comparable cap)