p.21 #1 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Sony published MTF for the new GM, and it's possible to get some idea of the differences from them and the corresponding data for the ZA. You cannot tell much without the 'fine detail' 40 lpmm which is what the high resolution sensors pick up (and the likely source for the midzone commentary), but the general pattern is available and these data derive from the same source - Sony.
The 30 lpmm green lines are therefore comparable here. In the ZA at f1.4, as you ask it to resolve finer detail it quickly drops maybe 15% from centre, then provides even performance for the entire frame. At f1.2 the GM center is a little stronger and stays that way longer, then commences a steady gradual decline to the corners. So, a stronger larger centre followed by lower outer frames. It falls off below the ZA level once past the short edge of the frame (12mm).
p.21 #3 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
GMPhotography wrote:
The one lens I’d be very reluctant to sell and I have is the 50 1.4 it’s simply maybe the best 50 around. I don’t know much of this 1.2 not following it but my question after testing all these lenses is at 1900 is this going to smoke it’s butt as a 1.2
Folks this has to be one very serious lens to do that. The 1.4 is arguably the best Sony lens around.
You all know me I’d jump on a pre order without hesitation but when it comes to the 50 1.4 I’d actually tie my buy hand down on the 1.2
All I’m saying is this at 2k is a risk IF IT DONT BY A HUGE DEGREE smoke the 1.4 off the planet. Obviously I love the 1.4 even though it is slow AF
Just sayin. Maybe test that 1.2 before selling off your 1.4...Show more →
Agree with you but I guess there are haters out there. I ask Dan Watson, after seeing his review of the new lens, why he didn't consider it an alternative and his answer was "Not worth it. I can guarantee the resale value of the new F1.2 GM will be more than $500 over the Planar. However, I'd consider the Planar if you buy it used and shoot mostly stills and nothing high speed or focus demanding"
My experience on my A7RIV is the focus speed is petty good. Maybe not the speed of the FE 135/1.8 but I didn't find it limiting.
p.21 #4 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Interestingly lenstip reviews show the GM beating the 50 RF in vignetting from f/1.2-2.0 and then suddenly the Canon leaps ahead
at f/2.8 and shows improvement beating out the GM where as the Sony just kind of stops there.
p.21 #6 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Yep, that lenstip sample is 100% EFCS.
I find the whole EFCS situation in Sony-land quite ridiculous. Even seasoned testers forget about its effect with high shutter speeds, the same way I do when the light changes and I'm shooting at wide apertures.
I'm also not really thrilled with the approach Sony has taken to this "problem" with A7c and A1. In the latter case (and in my planned usage luckily), you could argue you don't really run into the issue as you can stay in full electronic for most (if not) all the time. I wonder though how the future A7IV and A7RV will fare with slower sensor readout and no full mechanical shutter option......Show more →
I’m kind of nervous about it honestly. Hoping for the best but i would be so so bummed if the A7IV doesn’t have a fully mechanical shutter. Fortunately, the a7iii is still plenty of camera for me but I’ve put plenty of mileage on the shutter and I’ll be watching the next release closely.
p.21 #7 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Duowing wrote:
Interestingly lenstip reviews show the GM beating the 50 RF in vignetting from f/1.2-2.0 and then suddenly the Canon leaps ahead
at f/2.8 and shows improvement beating out the GM where as the Sony just kind of stops there.
lenstip did test the Canon 50 1.2 R? I didn't see that. Did you mean the opticallimits review?
In that case, comparisons might be difficult to do if procedures are different.
p.21 #9 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Luckily I'm not a 50mm guy so that will save me some money. Looks like a nice lens none the less. I have had the Zeiss a couple of times and really loved the images it could produce. Same with the CV 50 1.2. Just 50 for me is kinda no man's land in my kit. Still will look forward to some images people will post here.
p.21 #10 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
philip_pj wrote:
Sony published MTF for the new GM, and it's possible to get some idea of the differences from them and the corresponding data for the ZA. You cannot tell much without the 'fine detail' 40 lpmm which is what the high resolution sensors pick up (and the likely source for the midzone commentary), but the general pattern is available and these data derive from the same source - Sony.
The 30 lpmm green lines are therefore comparable here. In the ZA at f1.4, as you ask it to resolve finer detail it quickly drops maybe 15% from centre, then provides even performance for the entire frame. At f1.2 the GM center is a little stronger and stays that way longer, then commences a steady gradual decline to the corners. So, a stronger larger centre followed by lower outer frames. It falls off below the ZA level once past the short edge of the frame (12mm). ...Show more →
It seems indeed a little bit weaker than the ZA in the corners then. HelBen85 was right. However according to the MTF the new 50 1.2 will have a more natural decrease in sharpness from center to corners than the ZA. It will be interesting to compare them at 1.4.
p.21 #11 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
I still cant find anywhere how it compares to 1.4 ZA or nikon/canon 1.2 in terms of light gathering. Would the 1.2 truly give me better shutter speed(over sony 1.4 and 1.8 options) or sony is just playing mind tricks with us. Non of the youtube reviews say anything about it, neither the couple articles i read.
p.21 #12 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Ayoul wrote:
It seems indeed a little bit weaker than the ZA in the corners then. HelBen85 was right. However according to the MTF the new 50 1.2 will have a more natural decrease in sharpness from center to corners than the ZA. It will be interesting to compare them at 1.4.
We talk about f1.2 vs. f1.4. Stopping down will improve corners a bit, too. Additionally, these are not measured MTFs. I would be _very_ careful using those. Compare them for the f1.4 to the actually measured MTFs from lensrentals.com showing the strong midzone dip in sharpness (both my copies have that clearly). Then factor in field curvature, which can skew these comparisons.
So unless both are compared side by side and analyzed, this is all moot.
From Cameralabs, infinity, Sony A1, f1.2
p.21 #13 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Didarata wrote:
I still cant find anywhere how it compares to 1.4 ZA or nikon/canon 1.2 in terms of light gathering. Would the 1.2 truly give me better shutter speed(over sony 1.4 and 1.8 options) or sony is just playing mind tricks with us. Non of the youtube reviews say anything about it, neither the couple articles i read.
p.21 #15 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Didarata wrote:
I still cant find anywhere how it compares to 1.4 ZA or nikon/canon 1.2 in terms of light gathering. Would the 1.2 truly give me better shutter speed(over sony 1.4 and 1.8 options) or sony is just playing mind tricks with us. Non of the youtube reviews say anything about it, neither the couple articles i read.
DXO does that (mesuring T value). According to their measurements, Sony lenses are usually very close to their F values.
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Holger wrote:
We talk about f1.2 vs. f1.4. Stopping down will improve corners a bit, too. Additionally, these are not measured MTFs. I would be _very_ careful using those. Compare them for the f1.4 to the actually measured MTFs from lensrentals.com showing the strong midzone dip in sharpness (both my copies have that clearly). Then factor in field curvature, which can skew these comparisons.
So unless both are compared side by side and analyzed, this is all moot.
Good point. All of this is purely theorical for me. I'm not a huge 50mm user anymore and my 50 1.4 ZA has almost become a deadweight to carry at weddings. I use it less and less. If the future hypothetical 50 G is a solid f/1.8 or f/2 lens with a nice rendering, I may even consider it to replace the ZA.
p.21 #17 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Ayoul wrote:
DXO does that (mesuring T value). According to their measurements, Sony lenses are usually very close to their F values.
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Good point. All of this is purely theorical for me. I'm not a huge 50mm user anymore and my 50 1.4 ZA has almost become a deadweight to carry at weddings. I use it less and less. If the future hypothetical 50 G is a solid f/1.8 or f/2 lens with a nice rendering, I may even consider it to replace the ZA.
50 is my favorite FL, together with the 35mm. So I am looking forward to it. I included the cameralabs infinity comparison above to show the extreme corner performance. I think it to be really good for an f1.2 lens on 50 MP.
p.21 #19 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Tristan.W wrote:
read CL test as well. also DPR's wall-test-shots, it looks like 50 1.2 GM has softer corners before F2.
I really expect Fred's test, vs ZA.
or not sure if the quality issues, might be improved later. Just from MTF, 50GM should have similar cornor sharpness vs ZA 1.4.
I don't think, that there are things improved later on. The optical formula should be fixed by now.
I think corner sharpness should be comparable, too, but we know from R. Cicala how important field curvature is. So soft corners (not focussed on corners, but center) can be due to field curvature and optimal focussing is mandatory. Cicala put out a post at DPR on exactly this topic.
I don't personally mind about the very corners at f1.2, never need those sharp. I don't have anything against the f1.4 being sharper, too. It is a fine lens and we have two of those.
AF speed and f1.2 are things I can make use of.
Side note: My 55/1.8 has better performance in the corners than the 50/1.4 until about f2.8. Then the f1.4 gets slightly better.
p.21 #20 · Pre-order: Sony FE 50mm f/1.2 GM ($1,998)
Holger wrote:
I don't think, that there are things improved later on. The optical formula should be fixed by now.
I think corner sharpness should be comparable, too, but we know from R. Cicala how important field curvature is. So soft corners (not focussed on corners, but center) can be due to field curvature and optimal focussing is mandatory. Cicala put out a post at DPR on exactly this topic.
I don't personally mind about the very corners at f1.2, never need those sharp. I don't have anything against the f1.4 being sharper, too. It is a fine lens and we have two of those.
AF speed and f1.2 are things I can make use of.
Side note: My 55/1.8 has better performance in the corners than the 50/1.4 until about f2.8. Then the f1.4 gets slightly better. ...Show more →
I can fully understand that, as a wedding photographer, the AF speed of the GM vs the ZA will be a huge plus.
