Originally posted by ryan s In the interest of making the viewfinder brighter when using slow(er) lenses, there is no "snap" into focus with the stock screens. There's just no comparison with a matte type screen.
I transplanted the focusingscreen.com Canon S-type from the K-5 into the K-3 today, works perfectly with the stock shim. Same exact procedure, I wouldn't be surprised if Pentax even reused the same parts.
Is this where a few of us get to say, "told you so" about the screens being interchangeable?
One note though, that's awesome that it worked for you without having to change the shim, I should be so lucky, but it won't necessarily be that way for everyone. There are variations in individual bodies. There was quite a bit of this when everyone first starting getting the s-screens in their K-5's. Of course, if they've found a way to eliminate these variances with the K-3, that would be freakin' awesome!
You are right on about the difference with a good matte screen.