Special effects filters

Has anyone used a Cokin special effects filter in front of a port? Do the optics work at a water/filter interface? How might you mount a "P" type filter holder to the port? I tried yesterday, and gave up after a couple of ideas failed dismally...

Alex T (Alsky72) showed me some very interesting "in-camera" special effects shots created at an invitation photoshoot, suggesting that it could be done.

Tim

I have used starburst and prism filter back on film. I showed them in a talk (with slides) many years ago at BSoUP, I think. But these were inside the housing.

I guess using them externally would depend on how the filter worked. Ones that use surface effects (on the glass) I suspect would change. Those which are sandwiches would be OK.

Alex

Ta!

T'other Alex seemed to suggest that the radial blur filter did work outside the camera, leaving one the option of taking both standard and effects shots.

Tim

Maybe it needs to be sandwiched behind a clear glass filter and therefore in air?

A lot of on the day competitions (in fact all I know) are judged at screen res - so you need to worry about loosing image quality for an effect.

Although, since I am judging the BSoUP Splash In this year, perhaps we shouldn't be having this conversation!

Alex

Now. whatever made you think about a competition... ?

Tim