So I am about ready to pull the trigger and purchase either an e-m5 or e-m1 and the Olympus M.Zuiko Digital ED 60mm 1:2.8 Macro. A lot of the macro work I do is out in dusty, rainy conditions and this lens and these body combinations seem ideal. I am currently a Pentax shooter and they offer a 100mm WR macro lens but I am not so impressed with its sharpness from samples I have seen and DXOmark ratings. It also has too far of a minimum focus distance for my tastes and subjects. The Olympus 60 on the other hand is 60mm and has a much closer minimum focus range and from DXOMARK ratings and from samples I have viewed on flickr it is a better weather resistant macro. So what I don't understand fully about the Micro 4/3 system is the crop factor and equivalence as it impacts field of view and image magnification. What I understand is that the Olympus 60 has field of view equivalent of 120mm in full frame. Does that also mean that there is an equivalent magnification of the image? This Olympus page alludes to 2X magnification in FF equivalence. http://www.getolympus.com/us/en/lenses/pen-omd/m-zuiko-digital-ed-60mm-f2-8-macro.html I am concerned that between the narrower field of view, shorter minimum focus distance and unknown magnification factor that focusing this lens farther back from its minimum focus distance would actually not allow me to see as much of the subject as the Pentax 100mm macro would at its minimum focus distance and even less so at the 60's minimum focus distance if that makes any sense. Can anyone clarify this point for me? Pentax 100mm WR macro min focus distance = 0.30 m (11.81″) on APS-C 100mm = 150mm and FOV = 16 degrees Olympus 60mm Macro min focus distance = 0.19 m (7.48″) on MFT 60mm = 120mm and FOV = 20 Degrees Perhaps I have answered my own question now that I am looking at putting the Pentax 100mm in APS-C vs. FF equivalence. Would I be correct in surmising that at the same distance of 11.81" focus distance (the Pentax's minimum and 4.33" out from Olympus min focus) that the Olympus would provide more than 20 Degrees FOV? I would prefer something in the range of 32 degrees like the Pentax 50mm macro offers but it isn't weather sealed. Also is there some real magnification difference that will really require me to be at a greater distance from my subject with the Olympus than I would be used to with a 1:1 lens? It's highly annoying that neither of these lenses includes an aperture ring. Of course there are other shorter macro lenses for Micro 4/3's but from what I can see none of them are weather resistant like the 60mm and that plus more inherent DOF is the whole point of even approaching this system for me. Thanks in advance for any thoughts or corrections.