Upload & Sell: Off
I'm glad you got a good copy. Mine never worked out for me as I wanted to use it for night shots at the wider apertures. The focus calibration was off a mile on the Samyang, but that didn't phase me at all. I simply could not get sharp results at f2.8-4.0, where I wanted to use it. I always found myself gravitating back to the Zeiss 21/2.8 ZE and simply dealing with a smaller view. The Zeiss is sharp in the corners, even wide open, and had that great micro contrast. My recent alternative is the Canon 17 TSE , but its rather slow at f4 max aperture. Also stars woudl begin tracking with 2 longer exposures, making a wide angle flat stitch pano impractical. As the others posters note, the moustache distortion could be readily dealt with with PT Lens, but couldn't make soft corners become sharp.
I'm glad yours is working out, show us some examples.