Originally posted by clickclick wondering if it was worth the price difference from Lee to Kodak Wratten 2.
Personally I work with Lee filters because of their consistency, having said that Kodak are also an
excellent choice as well.
Originally posted by Oakland Rob nyone ever use a gel filter on the rear element of a lens in a K-01? I'd be reluctant to try it on a lens without a rear holder on a Pentax with a mirror flopping around nearby
I have worked with lenses that used rear gelatin filters, perhaps the biggest annoyance is the lack of GND* filters, secondly is how fragile the filters are. In the field it is easy to lose them and even easier to mishandle and inadvertently scratch them. But they work well, in some ways are superior to front mounted filters.
I wouldn't advise attaching a thick glass filter to the rear of any lens, not only can it damage the mirror mechanism/shutter should it come loose. But thick glass also has an effect on the optical properties of the lens, and attaching thick filter glass to the rear cell of a lens can have rather catastrophic impact on image quality.
*Graduated Neutral Density