Originally posted by pentaxmz This will be a perfect prime for video work and the lack of auto focus is moot b/c Pentax doesn't support auto focus in video mode
Actually, I wouldn't consider it a moot point, I would consider it an advantage, for two reasons:
1. The Samyang has a longer focus throw than many autofocus lenses.
2. The Samyang has hard stops at the minimum focus distance and at infinity. Some lenses, such as Canon and Nikon zooms, do not have hard stops. What this means is that, if you are using a follow focus, your focus marks will be inaccurate every time you pull focus past either infinity or minimum focus distance.The reason is that the focus ring keeps on turning. This is a huge pain, and I will try to avoid owning lenses without hard stops for this reason.