Hi I was just wondering if any of the fine people on photographyreview.com can help me with this question.....

I have just got a type E focussing screen for my FM3A {it originally came with the k3 screen [split image rangefinder]} which is crisp and clear to look through.
I put the type E screen in {its the gridded screen} but I dont know whether its normal or not but the screen when looking through it looks extremely grainy...just wondering if anyone can tell me if this is normal??

Thanks for your time
Bevan.n.z