millsart
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bobbytan wrote:
There are some really great native m43 prime lenses but you can make it twice as much fun when you use non-native FT and 35mm lenses from OM, Canon, Nikon, Pentax, Zeiss, etc ... that you already own. This is one of the great attractions of the MFT format. - you have the widest selection of any format.
I think you missed the sarcasm intended in that post first of all.
Second, I've got plenty of Nikon AI and AIs lens, my OM system glass still, some Canon and Pentax lens etc and a number of adapters. However, I really don't find any of them all that fun.
With the 2x crop factor my old "wide" 28mm suddenly gives the FoV of a 56mm lens. It also means I've got to manually focus it, which I don't really find that enjoyable unless I'm using a RF patch on a Leica. Focus peaking on the NEX wasn't too bad though I will admit.
Really though, it comes down to IQ and usability though and my 28mm f2.8 OM lens simply doesn't have any IQ gain over using an excellent lens like the native 25mm f1.4 Pan/Leica. In fact, the native lens performs better, not to mention being much faster.
Same story when it comes to my legacy 50's, the 45mm 1.8 is simply sharper and it can focus instantly rather than trying to muck about with a zoomed in image jumping about. Yes the stabilized EVF does help a lot, but its still pretty tough at longer focal lengths.
For anything truly wide, well you can forgot about that. No legacy glass out there is going to give me anything close to my 12mm Olympus. I could spend serious money on something like an old 18mm lens but yet again due to the crop factor its suddenly a 38mm, not wide at all.
Now its true that crop factor can come in handy with some telephotos, and I've had a little fun putting my Nikon 200-400 and 400 on my m4/3 cameras to get 800mm equiv.
Gives pretty sharp images too, but the thing is again, you've got to manually focus it which is difficult with long fast glass, not to mention carry it around.
Sure the 70-200 2.8 works pretty well, but its a 4lb lens with a camera hanging off the end. Not going to wear that around my neck. Rather I'll use the 7oz 45-175 which I can wear all day, that gives me AF and while a little slower just makes far more sense.
Really what it comes down to is if I'm willing to carry a 7lb lens around, such as a 200-400 f4, then there is no real advantage to the m4/3 cameras light weight. I might as well add another half a pound and take my D7000.
Yes I do give up .5x extra crop factor, but with the APS-C DSLR I gain great auto focus including tracking, and optical VF and a body that balanced far better on heavy glass.
Just no real point to seriously ever want to put my m4/3 body onto long glass, and as for short glass, well the native lens are sharper and faster in most cases, and there simply are no legacy wides that would actually be wide.
If you've got some stuff laying around, by all means, pick up a $10 ebay adapter, its fun for an afternoon and worth $10, but I really wouldn't suggest spending good money on high end adapters or buying lens with the purpose of using them on m4/3.
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..I think it's about time 
Why ?