Originally Posted by morfic
Can't help you with K10D, but if you are at all interested in K20D results, and my patience permitting, i could do whatever test you want using my Nokton 58/1.4, may be also educational for me to know how much it changes and determine what (if any) EC to dial in.
Mine won't be a Katzeye, but one from jinfinance, which is laser cut from a K1000 split image screen.
Let me know if this helps anything.
I would be interested indeed.
The test takes about 20 minutes to perform in total, including review of the data
I have attached a link to a past post, (please accept my appologies in advance for the title, ) but it shows the impact of a different focusing screen in the K10D with manual apature lenses and stopped down metering.
The test involves using green button to meter at each apature detent, and then measuring the average grey scale value of the central 10% of the image. I like block walls, side walks or paved surfaces as a target, although a grey card would also do.
http://www.pentaxforums.com/forums/241716-post69.html