Originally posted by vinzer True, it's really more down to one's shooting preferences. As you said, light transmission is still f/2 any which way you look at it. I don't see why there are detractors and fanboys making 150-post threads in DPReview with most of the posts forcing one to adopt the preference of another, when there really is no one correct answer in approaching a shot. You value light gathering ability, lol101 values DOF control better, and both are valid reasons for choosing one over the other.
I suspect a lot of conflicts in this world, big and small, can be avoided if only people could respect each other's choices, as long as it doesn't trod on other people's rights.
Personally, I really don't need razor-thin DOF, so I tend to gravitate towards light-gathering ability more, though not at the price Olympus wants for their f/2 lenses, wonderful as they may be. If I went Olympus, I'd probably be happy with a 12-60 and 50-200 kit.
I have no interest in trodding on the rights of others, I just get irritated when one or another poster just dismisses the validity of something (such as the 4/3 system or the advantages it offers to some shooters) based on their personal preferences. Yes, lol101 may prefer the dof control, and that's just fine, but that doesn't negate the fact that on the lens front, 4/3 has indeed delivered on the "smaller" promise in many ways. I could also bring up the fact that Olympus lenses are designed to be as close to telecentric as possible, which is pretty much standard for teles but for wider lenses, well, the newest 24-70 f2.8 for Nikon was designed with telecentricity in mind and it shows in the fact that it's much larger than some other 24-70 f2.8 designs, some of which aren't much bigger than a digital standard zoom. Oly's commitment to telecentricity results in their lenses being a little larger than they might otherwise be, but it shows in the image quality.
One thing 4/3 can offer that FF can't? Let's try finding something equivalent to the 7-14 on the E-620... closest I can think of in cost is the old Canon 5D with the newer Nikon 14-24 attached via adapter, which will still be about twice as costly, not to mention very bulky and it loses the full functionality of the lens. If you want to keep lens functionality, the D700 is the lowest you can go, and that brings the price way up... not to mention being relatively huge. Then again, you get a much nicer viewfinder and better AF (inasmuch as that's necessary with an ultrawide), a more rugged body, high ISO capability, etc. Tradeoffs-- they're all over the place, but you can't dismiss the validity of the 4/3 choice there.
If someone showed up and started saying that FF had absolutely no advantages and that its basic premises for existence were flawed, I would argue with them too. Or APS-C. Hell, there are advantages to compacts. Your choice is your choice, but it's not grounds to condemn the other options.