12-15-2010, 06:15 PM
[quote name='popo' timestamp='1292435490' post='5012']
For lack of a better description, not everyone shoots "equivalent DoF" priority all the time. Or even most of the time. The potential purchasers would likely shoot "I need more light" priority, and that's where this lens fits in.
If you're going to do the format compares, then you can pretty much strike out APS-C, since there is no 30-35mm f/1.2 which would be required if you maintain the equivalent aperture comparison. Even downgrading to a f/1.4 isn't cheap still. The full format may have a 50mm f/1.8, but you still need the full format sensor behind it, again not so cheap in any fair like for like comparison. And all that still neglects considerations outside of image quality.
Having said all that, I wouldn't get one either. The MF experience on Olympus at least just isn't there. If it had AF, it might raise some interest even if it the image quality isn't there wide open.
[/quote]
You are right, in that for APS-C there are not as fast standard primes. On the other hand, uptill this f25mm f0.95 there was no f1.4 equivalent or even f2 equivalent for 4/3rds either.
So... compared to full frame, this lens is nothing special. Compared to APS-C, this lens is not all that special, but it does open wider. On 4/3rds, it is special and very welcome, but lacking AF.
You are also right on the "I need more light" priority. For 4/3rds users it is a welcome addition in that aspect. Compared to FF, it is nothing special here again (considering one uses equivalent ISO settings). On APS-C again this lens has a 1 stop advantage.
For lack of a better description, not everyone shoots "equivalent DoF" priority all the time. Or even most of the time. The potential purchasers would likely shoot "I need more light" priority, and that's where this lens fits in.
If you're going to do the format compares, then you can pretty much strike out APS-C, since there is no 30-35mm f/1.2 which would be required if you maintain the equivalent aperture comparison. Even downgrading to a f/1.4 isn't cheap still. The full format may have a 50mm f/1.8, but you still need the full format sensor behind it, again not so cheap in any fair like for like comparison. And all that still neglects considerations outside of image quality.
Having said all that, I wouldn't get one either. The MF experience on Olympus at least just isn't there. If it had AF, it might raise some interest even if it the image quality isn't there wide open.
[/quote]
You are right, in that for APS-C there are not as fast standard primes. On the other hand, uptill this f25mm f0.95 there was no f1.4 equivalent or even f2 equivalent for 4/3rds either.
So... compared to full frame, this lens is nothing special. Compared to APS-C, this lens is not all that special, but it does open wider. On 4/3rds, it is special and very welcome, but lacking AF.
You are also right on the "I need more light" priority. For 4/3rds users it is a welcome addition in that aspect. Compared to FF, it is nothing special here again (considering one uses equivalent ISO settings). On APS-C again this lens has a 1 stop advantage.