I expect it to be excellent, but different. But, 'matching', in terms of 'quality' or 'look' are all highly subjective, IMO. What I expect, are RELATIVELY excellent results within reason (understanding the effects of the large differences between the formats we are comparing), and given the relative limitations of size and cost (in both formats).
The Zuiko's construction:
https://www.olympus.com.au/Products...ko-Digital/M-ZUIKO-PRO/17mm-F1-2-PRO/Features
Olympus' approach seems to sacrifice some capability into strong light and transmission, in order to very highly correct aberrations, etc. Based on the results from my 25/1.2, I support this approach.
It's an interesting dilemma, though. When the f/1.2 and f/1.4 are both T1.8, then all you're getting in exchange for the substantial extra size, weight and cost is slightly shallower DOF and more corrected aberrations(if indeed they are). Given the widespread views here on shallow DOF, and with it the implicit acceptance of not-very-sharp as sharp, the question is the extent that's a good trade.
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Tinkety tonk old fruit, & down with the Nazis!
Bob
Hi Bob, I've noticed that you've mentioned the T1.8 value a lot in reference to these PRO primes.
When I look at DXOMark, I notice that the only camera that gives T1.8 for the 25/1.2 is the E-M1 II.
https://www.dxomark.com/Lenses/Olym...5mm-F12-PRO-mounted-on-Olympus-OM-D-E-M1__909
For every other body it gives T1.6, except for the GM5 which gives T1.7.
So it seems like something is fishy there. I don't know whether it is a methodology problem, or some issue with their E-M1 II specifically.
It seems that their E-M1 II gives slightly lower T-Stop ratings with several lenses.
This is, of course, a big problem, since the T-Stop is a function of the lens itself and has nothing at all to do with the sensor behind it. Obviously that sensor can have different levels of sensitivity, but that is irrelevant to the lens.
This degree of inconsistency really makes me question DXO's testing methodology, given 1/2 stop variations coming seemingly out of nowhere.
Do you have a hypothesis for the disparity in the measurements?