First of all, I've owned Hitech filters in the past and there was absolutely no magenta cast with them. I bought a new set a few weeks ago and I finally got to use them today. Disappointingly, I couldn't get more of a cast if I tried. 
I tested the GND (3-stop) today and there was a bit of cast but not too bad.
 | HTTP response: 404 | MIME changed to 'image/gif' | Byte size: ZERO | PHOTOBUCKET ERROR IMAGE |
Went out later and stacked ND/GNDs with terrible results. There was a bit of magenta in the sky but nothing like captured on the sensor.
| HTTP response: 404 | MIME changed to 'image/gif' | Byte size: ZERO | PHOTOBUCKET ERROR IMAGE |
So, again, are these filters just junk now? Had I known I wouldn't get the results I got in the past, I would have went with Lee. Very, very disappointing.
