I went through this. I can only tell you my thoughts on the matter, as the decision is rather personal
I started with Pentax 3 years ago, have shot Canon, Nikon, Sony, and now Olympus (I still own a 1/2 Nikon system).
When I was purchasing the E-5 and lenses, I had to really struggle with the decision to instead get a K-5. The camera looks awesome, has amazing DR and great noise performance. The posts on the Pentax thread where people were pulling up almost 10 stops of shadow noise were incredible.
The thing that kept me from returning my Olympus stuff? The lenses. Pentax has a decent lineup, but I just like the Olympus lineup better.
With Olympus, I got myself the 14-54 II and the 50-200 SWD lenses. Both are excellent optics, have 0.5x macro performance, and both are weather-sealed. Both take my 1.4x TC nicely, giving me more reach for birds or a bit more macro magnification.
I think both are great systems - I love Pentax, and maybe one day I will get myself another Pentax camera. But for me, at least, Olympus won (especially since I plan on getting longer glass one day - Olympus makes longer equivalent glass, Pentax stops at the 300mm f/4 and doesn't even make a 1st party TC).
If you're just considering E-5 with 12-60 vs K-5 with a lens (maybe their 17-70?), I would strongly look at the pros and cons of the entire system.
Personally if I was
just considering the above combos, I would go with Pentax. Besides the flip LCD of the Olympus and better AF-microadjustment, there really isn't much of an advantage over Pentax when looking at just these combos, especially if you keep with the weather-sealed lenses of the Pentax lineup (DA* and WR lenses should be sealed).
A K-5 and a DA* 17-50 or whatever it is would make an awesome all-around combo.
Hello Olympians,
I have recently held an Olympus E5 and fell in love with its feel. I also know the 12-60 to be an absolutely top class lens.
I currently have a Pentax K5 and 16-50 D* F2.8 lens.
Has anybody had experience with both systems ( Olympus and PENTAX ) , as I wish to "jump" ship to Olympus.
Is the E5 image quality going to be at least as good as the Pentax ?
I am attracted to Olympus 4/3 due to its lens and focal length advantages.
Your comments please.
Thank you v much.
Adam.
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JL Smith
http://jl-smith.smugmug.com