Originally posted by Snydly Hey Wim,
Sorry to get off the love fest here, but how do you like the Katzeye? I shoot Canon film and and rely heavily on the split prism focusing aid, and would love to have the same on my k7, but read there is EV adjustments necessary at times. I don't want to make things more complicated. Do you recommend it?
I like it a lot, but note that I have a custom designed edition. I explicitely didn't want the split prism, but wanted special grid lines. Basically the gridlines combine square crop marks, a 3x3 grid and central focus point brackets. It was finished with the Optibright treatment for a clearer view finder.
On my K20D this resulted in slight underexposure, but the K-7 having a different metering (77 zones) makes for more accurate (more to the right) exposure with possibly slight tendency to overexposure in highlights. The KatzEye compensates for this resulting in exposure that suits me fine on average.
I cannot judge the impact of the split prism (the possible blacking out of one of the halves of the prism with a stopped down or slow lens) on metering... But I guess this is one thing that you will need to compensate for manually.
There were indications that the KatzEye screens could be slightly thicker than the original Pentax ones, thus resulting in inaccurate visual focus confirmation. I thought this might be the case with mine as well, but since recently using the K135/2.5 I have the impression the focussing screen is accurate enough. I now put it down to user error (not looking critically enough). Perhaps a copy with split prism will behave differently because of the split prism's properties? Without it seems ok.
Note that this difference in thickness does not impact AF accuracy, since the AF sensor sits below the mirror in the bottom of the camera, not behind the focussing screen like the meter.
Wim