Review on TYCKA 420-800mm f/8.3 DSLR Camera Lens: Ultra-Telephoto Manual Zoom for Shooting the Moon and Birds - Telescope SLR Lens (Canon T-Mount) for EOS Rebel T3-T7i, SL1, SL2, 5D-7D, 60D-80D II/III/IV by Alex Barnes

I didn't have high hopes for a $100 lens so imagine my surprise at this amazing product. Speed. It also takes a few minutes to understand the focus points. Once you do that, the quality is quite satisfactory. The build is pretty cheap, but then again, you get a lot of money for a $100 lens. The attached photos are my test shots. Admittedly, I'm not familiar with manual focus, so I sincerely believe the quality could be better.