Originally posted by cadart I think the conclusion is very simple......if you read every single lens review on this website you will see one word over and over again.....SHARPNESS!!!!!!
Is the k5iis worth an extra $100 for extra sharpness....of course it is. I can't believe this is even being discussed.
The difference for me is theoretical sharpness compared to visual sharpness in the images you look at.
The question should have been framed... would you pay $100 for 8% more sharpness, that you will probably never use unless you pixel peep, or produce extremely large prints. Should you pay for more than you use?
If the level of sharpness in my K-5 is acceptable for what I do, and I can't foresee a time when I need that level of sharpness offered, then yes, paying for more sharpness is pretty silly. You might do it, but that's just human nature. We define a good deal then go for it, whether it makes any sense or not.
So, the first things you have to establish is that you can see a difference. Not pixel peeping, but in the real world. And believe it or not... as far as I know, that has never been done on this site. In fact I've posted D800 and K-5 images which would suggest that unless you're using more than 3000 pixels horizontally across it doesn't even make a difference if you're using a K-5 or D800.
Further in other tests, I've pretty much determined that on a K-5 you can't really distinguish a difference of less than 150-200 lw/ph looking at the images in a normal viewing environment. This from looking at images at the same focal length pictures from different lenses. 8% falls somewhere less than that.
Think of it as viewing two smooth tables. They both look and feel smooth. Does it matter to you that one was polished with a one micron grit and the other with a half micron grit. One is twice as smooth as the other, but why would you pay for that? As a cabinet maker, we stopped sanding our pine furniture at 220 grit. We could have used 600 for a "smoother finish", but the customer would have been paying for a quality of finishing that would make no difference to his user experience. This analysis based purely on "sharpness" is very similar. You can pay for as much as you want based on the theoretical limits to sharpness, but unless you can show how it makes a difference to your photography, you're buying on speculation that it will. Numbers are just numbers.
So there are many reasons that an 8% increase in sharpness might not be worth $100. As I indicated before... if you can bump that up to 20% I might be interested. So let's be clear, if I was buying right now, I would probably go for the IIs, although, as a mostly landscape photographer, the false colour in the posted images is troubling. Possibly enough to make me stick with the II. But as a K-5 user, 8% is not worth the upgrade, which will cost me considerably more than $100.
You have to ask. What are you getting for that $100? If all it is is bragging rights when pixel peeping... then no. If someone shows me it means something in some category I care about, then I can evaluate.