jrista said:
ritholtz said:
Neutral said:
Technology involved in thise G-Master line is very interesting and very promising.
Extreme high precison of optic elements manufacturing. Optimized AF mechanics for each lens. For 70-200 this includes two AF groups, front and rear, and also wobbling support for rear AF element to provide smooth continious AF for video.
Design baseline for all is 50 lp/mm.
MTF charts are also very impressive and better than MTF for similar Canon lenses.
I am interested in all of them, especially with 85 f/1.4 to replace my Canon EF 85 f/1.2 II as Sony 85 f/1.4 is superior to Canon 85 f/1.2 II in all respects.
I expect all of G-Master to give better IQ on a7rm2 than the similar Canon lenses.
Though my Canon EF24-70 f/2.8 USM II and EF70-200 f/2.8 IS USM II both work very well on a7rm2 giving excellent IQ and very fast and precise AF but I am missing eye AF support available when using native Sony FE glass and definitely better continious AF tracking.
So now I am planning to sell Canon 85 f/1.2 II and replace it with Sony 85 f/1.4 GM to use on a7rII and possibly get the other Sony GM lenses.
Also to replace Canon 1DX with 1DX Mark II to have better performance with tele lenses especially in low light conditions . From different pieces of informatin from different sources I expect that 1DXm2 could have at least one stop better high ISO performance than 1DX and as result 1DXm2 could outperform both a7s and a7r2 at high ISO and again could become low light king.
Currently I get much better IQ from a7r2 compared to 1dx at all ISO range including low light shooting at high ISO.
Also would be interesting to see if Sony release rumored a9 with better AF than new a6300 and this happens before Canon starts shipping 1DXm2. This could force to change my mind regarding getting 1DXm2 instead of 1DX.
DPR did real world test with in typical conditions. They find it not upto the mark. Is a6300 going to have better PDAF than a7rII. Looking at that review I got the impression that even 70D could do a better job in terms of tracking and usability.
http://www.dpreview.com/articles/5684109129/lucky-number-7-shooting-pro-sports-with-the-sony-a7r-ii
The A7r II is a 42mp beast with a measly 5fps frame rate. It's perfectly fine for non-action stuff, it focuses perfectly well for those circumstances. I've long considered 6fps to be the minimum I would consider for birds and wildlife, and it's still not really good enough. I need more to get the ideal shot. The a6300 has 11.1fps, and an improved PDAF system. Barring focus group weight or lens power draw issues, it should perform a lot better for action shooting than the A7r II, and better than a 70D with 11.1fps.
11.1 fps is better than 7 yes....,
When I sold my 7d to a good friend of mine (for a friendly price), I was looking to add something else,
At the time the 70d looked like an good option, but mirrorless looked compelling as well....
Im a sucker for buffer, and consider it the only downside on the 1mkiv (It would have approached perfection for me if it had 50-60-70raw)
So after crunching some numbers I ended up adding an olympus ( lol..., I would have never thought that).
Sorry to bore some of you with some numbers ,
But some math did the trick for me.... ,
70d: 6.74 frames/s for 14 shots, then it slow down to 1.27 frames/sec (95mb UHS-I card).
em1:9.9 frames/s for 50 shots then slows to approx 3 (also 95mb UHS-I card).
Situation 1 : Suppose 2 seconds of action
70d =13.48(14) shots => 100% shots in focus =>14 usable if 70%
em1=19.8(20) shots => 70% shots in focus =>14 usable, needs 49%
I supposed: 70% in focus for the 70d(10 shots), where the em1 needed 49% to match it.
now the 'best' case for the em1.
situation 2 :5 seconds of action
70d = (6.74*2) + (1.27*3) = 17.29(17) shots 100% in focus =17 usable shots 53% in focus
em1 = 9.9*5 = 49.5 (50 shots) 34% in focus =17 usable ,needs 18% in focus to match
For raw+jpg the numbers would be
(6.74*1+0.87*4) = 10 shots if 100% in focus , if 60% in focus
(9.90*3.5+1.5*1.3)= 37 shots needs 27% in focus, needs 17% in focus....
Based on these numbers I though ah well why not try it ..., being skeptic and expecting terrible results I was easily impressed by the focus speed (static) and tracking capabilities(in decent light) of this little thing..., few tests on easy subjects like cars/cyclists/dogs/birds(against sky) I easily achieved between 70 and high 80's% in focus.
In my view fact is compared to entry/mid level DSLR's from nikon/canon the (top) mirrorless doesn't need to match the AF performance to get the same number of keepers , Higher frame rates and (much) deeper buffers ( especially when considering RAW) can make up for some of the lower 'hit rates'....
No it will not replace a DSLR(any time soon) for difficult tracking situations(some issues:viewfinder blackout , lower light tracking capabilities , lack of raw acquisition speed.. and the matter of 'trust'

), for the time being I stick with DSLR for wildlife photography as main camera..., but the a6300 seems to (partially) address the viewfinder blackout.
I can see how something like a sony a6300 can be a great addition/option to some (canon) shooters,
11 fps and a 50% bigger buffer compared to a 70d allows for some lower hit rate on the a6300 to still get similar number of shots in focus... It will be interesting to see how well it performs with canon glass (i don't want sony glass), and I might be tempted to get it instead of the em-1 (would be nice not having to manual focus some glass...)
don't misunderstand me for saying it us just as good or that it equals it, because that is not what I'm saying. I am just trying to restate some obvious thoughts which I think some of the 'defenders' sometimes overlook

.