ok i did it...
I got my old PS2 box and cut a circle about 1cm bigger that the diameter of my ota. then about 1.5-2cm from the edge I cut a 8cm diameter hole... placed the card on top of my ota and headed outside with it...
I have to say that from planetary work it is great... of course saturn ws the only one up at the time of testing but it is such a worthy subject.
The seeing was really bad but saturn looked better than I have seen for quite a while. the increase in contrast with the mask was really noticable.
A really big thanks for the tip rajah.
at zero cost it was well worth the money
hey ice, you might want to try this for your saturn and jupiter photography for more contrast... it doesnt cost anything to try. Id be interested in seeing results too