Originally posted by tlwyse There's probably no convincing the zealouts...but here's a comparison (attached PDF) I put together the other day...comparing camera systems/lenses of a K-5, Nikon D600 and D800E. In the top portions I chose premium lenses that were all in the same (effective) focal length range. In the bottom, I made substitutions of nearly equal quality lenses (lens quality was based mostly on DxOMark scores). You can see that with only a few lens substituions of the Nikon lenses, lenses that are arguably of equal or better quality than what's available for Pentax, that you can get within spitting distance of the cost of a Pentax system....in the case of the D600, a bit less, the D800E a bit more. Prices were pulled from B&H and rounded to the nearest whole USD amount.
Let me re-state that I've been a Pentax "fanboy" since I was 16 and picked up my first Spotmatic F when I shot for the high school yearbook and have had Pentax ever since....(ME, ME Super, K1000, LX, Pz1P, K100D, K10D, K20D and 6x7)...nearly 40 years worth......but reality is reality and I'm ready to switch unless Pentax announces a 20+mp Full Frame body in the next 6 months...and keeps it under $2K USD.
Terry
hmmmm, you have the Pentax system after the substitutions at $1500 less than a D600 and the D800 $2800 more. YOu do realize that a lot of people don't spend $1500 on thier whole system. ANd to get the systems that close you traded the a 2.8 70-200 for a 70-200 f4 lens....OK now trade the Pentax 18-135 for the DA* 18-135 and now your D600 is $2500 more and the D800 is $3800 more. You can play this game forever.
Every lens on an D800 is going to give you more resolution than your K-5, all the D600 give you is a bit more resolution and FF's different FF DoF .
Funny how two people can look at the same numbers and come to totally different conclusions. You didn't put in the Nikkor 14-24 that last portion of the Trinity which everyone on a Nikon seems to covet. another 2 K, and compared to the Sigma 8-16 (not available on FF) another $1200 difference. You also rather brazenly compare the FA 31 which is on some experts best three lenses of all time list to a Nikkor 50. Get the DA 35 2.4, and you've knocked another $1000 off the Pentax price.
Just with those two things 18-135 instead of 50-135, DA 35 2.4 instead of 31 Ltd, and I've taken $2000 off your price...dropped the price of the Pentax system to less than half the D800 price and almost half the D600 price.
I'm not saying you want to do that... but it really doesn't make any sense to compare one of the best lenses ever made to a Nikkor 50 1/4G. Now maybe those are the exact systems you would buy, and that's good for you, so for you the comparison is valid. I'm not sure how many people your selections are relevant for, certainly not for me. Especially when you substitute an f4 lens for an F2.8 lens in an area where those 70-200 2.8s are probably one of the most popular lenses on FF.
The arguement for FF to me has always been more resolution, not better price. I'm not seeing anything here that changes my mind.