Hi Paul, I've used that same hood on my 50mm lenses with the digi. Seems to work well, although I've net checked it with a pol filter. However, for the most part, I use the 105/2.8 Takumar hood. It's a little smaller and more convenient to use and carry.
Shel "You meet the nicest people with a Pentax" > [Original Message] > From: Paul Stenquist > An FYI: I tried the Takumar 135/3.5 lens hood on the FA 50/1.4. I see > no vignetting in shots of a white wall. It's a nice metal hood for this > lens.