B&H review https://www.youtube.com/watch?v=2cz5eTULLCM
They should have hired the pretty girl from Adorama to do the review LOL
They should have hired the pretty girl from Adorama to do the review LOL
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privatebydesign said:SecureGSM said:Nice looking lens. Not sure the IS was that much useful shooting portraits though. Unless you shoot with shutter speed slower than 1/125 and you likely don't. Here is Sigma 85 Art mtf and distortion charts just for comparison.
privatebydesign said:Jopa said:mclaren777 said:I was definitely hoping for a better MTF result.
Same
It didn't reach the 35 II theoretical level...
I'll take the four stop IS over an ounce of theoretical MTF. That IS unit is nearly as big as the one used in the 400mm f2.8!
Bokeh is looking very nice too......
Don't tell me where I shoot! I use the 35 f2 IS at 1/4 sec for people pictures, I'm sure I'll find a good use for the IS on the 85!
Also you can't compare different manufacturers MFT charts, Canon go so far as to say you can't compare their own MTF charts against each other at different focal lengths. Besides nothing on earth would convince me to buy a Sigma lens, so what it is capable of is irrelevant to me.
privatebydesign said:Don't tell me where I shoot! I use the 35 f2 IS at 1/4 sec for people pictures, I'm sure I'll find a good use for the IS on the 85!
traveller said:All these mtf charts are only computer simulations in any case, few manufacturers actually measure the mtf values from their (representative number of samples of) lenses (Zeiss excepted). Nevertheless, I'm getting the impression that absolutely resolution was not the design objective of the Canon 85mm f/1.4 L IS and that the Sigma may very well out resolve it.
privatebydesign said:Don't tell me where I shoot! I use the 35 f2 IS at 1/4 sec for people pictures, I'm sure I'll find a good use for the IS on the 85!
Also you can't compare different manufacturers MFT charts, Canon go so far as to say you can't compare their own MTF charts against each other at different focal lengths. Besides nothing on earth would convince me to buy a Sigma lens, so what it is capable of is irrelevant to me.
snoke said:privatebydesign said:Don't tell me where I shoot! I use the 35 f2 IS at 1/4 sec for people pictures, I'm sure I'll find a good use for the IS on the 85!
You take photos, other posts on Internet. Don't waste time here. Comments make it obvious who make photos and who not.
Jopa said:SecureGSM said:Nice looking lens. Not sure the IS was that much useful shooting portraits though. Unless you shoot with shutter speed slower than 1/125 and you likely don't. Here is Sigma 85 Art mtf and distortion charts just for comparison.
privatebydesign said:Jopa said:mclaren777 said:I was definitely hoping for a better MTF result.
Same
It didn't reach the 35 II theoretical level...
I'll take the four stop IS over an ounce of theoretical MTF. That IS unit is nearly as big as the one used in the 400mm f2.8!
Bokeh is looking very nice too......
While I think IS is a good thing "to have" I completely agree it's not much relevant for portraits. If it offers fast AF it still can be a great walk around lens. I was just hoping for an Otus / Milvus / Sigma optical performance. Unless the theoretical MTF is wrong (worse than IRL)...
hne said:... I'm regularly hitting ISOs above 800 wide open with my 85/1.8 for photos in a home setting. That was the highest ISO with really good skin tones on the 5DmkII. If I can stop the lens down to about f/4.5, that'd give a much more natural transition out of focus for head and shoulder framed portraits. This would require 1/25s at ISO1600 . Luckily the 5DmkIV has about the same DR at 1600 that the mkII has at 800. Add IS and as long as the subjects don't move faster than about 0.01km/h (0.007mph) you'd get a really sharp shot. Could actually be doable when people are sitting down..
...
SecureGSM said:just an observation, personal experience only, nothing set in stone:
still would be hard to achieve reliable outcomes as those people do breath and bodies keep on moving ever slightly I would not risk going under 1/60s shooting people up close with 85mm lens stabilised or not, your mileage may vary of course, but I was never able to achieve reliable results with 85 mm lens shooting at any slower aperture than that. there are plenty of other uses of course.
p.s. attached is an example of what you were referring to (people sitting down), Sigma 85 Art @F1.4, 1/60s, run and gun at a function. Sharpness is quite reasonable, to my eye at least, at 1/60s shutter speed but I would not go any slower.
hne said:... I'm regularly hitting ISOs above 800 wide open with my 85/1.8 for photos in a home setting. That was the highest ISO with really good skin tones on the 5DmkII. If I can stop the lens down to about f/4.5, that'd give a much more natural transition out of focus for head and shoulder framed portraits. This would require 1/25s at ISO1600 . Luckily the 5DmkIV has about the same DR at 1600 that the mkII has at 800. Add IS and as long as the subjects don't move faster than about 0.01km/h (0.007mph) you'd get a really sharp shot. Could actually be doable when people are sitting down..
...
wockawocka said:SecureGSM said:just an observation, personal experience only, nothing set in stone:
still would be hard to achieve reliable outcomes as those people do breath and bodies keep on moving ever slightly I would not risk going under 1/60s shooting people up close with 85mm lens stabilised or not, your mileage may vary of course, but I was never able to achieve reliable results with 85 mm lens shooting at any slower aperture than that. there are plenty of other uses of course.
p.s. attached is an example of what you were referring to (people sitting down), Sigma 85 Art @F1.4, 1/60s, run and gun at a function. Sharpness is quite reasonable, to my eye at least, at 1/60s shutter speed but I would not go any slower.
hne said:... I'm regularly hitting ISOs above 800 wide open with my 85/1.8 for photos in a home setting. That was the highest ISO with really good skin tones on the 5DmkII. If I can stop the lens down to about f/4.5, that'd give a much more natural transition out of focus for head and shoulder framed portraits. This would require 1/25s at ISO1600 . Luckily the 5DmkIV has about the same DR at 1600 that the mkII has at 800. Add IS and as long as the subjects don't move faster than about 0.01km/h (0.007mph) you'd get a really sharp shot. Could actually be doable when people are sitting down..
...
This is true, I can't see why they add the weight of a stabilised motor to focal lengths below 60mm
hne said:I totally agree that breathing can become a sharpness limiting factor. Luckily we can get away from about half of it using servo AF.
With wider angles and longer distance you get away faster movements per pixel. Same framing at wider angle of course means shorter distance. If you limit yourself to no wider framing than roughly half-body portraits, I can agree that 60mm or so becomes way too wide for IS adding much. But not everything is half-body or tighter portraits. There's group photos too, and architecture, landscape, ...
Framing width over horisontal resolution, divided by shutter speed is the speed at which movements become one pixel long lines. At 24mm and 5m distance, you'll have 5.2m over 6700px on a 5DmkIV. This translates into 7.8mm/s (1/3") for for example a loosely framed group shot stopped down to f/4 in the back of a church. Breathing wouldn't be an issue here, but hand-holding that non-IS 24mm for 1/10s would.
Geometry. Yay!
PS. You take great photos. I've learnt a lot from looking at them.
epsiloneri said:From the MTF, it seems to me that the Sigma Art is quite a bit sharper. It's all about compromises I guess, as the EF 85/1.4L is smaller, lighter, has IS and potentially a better AF (although the Sigma is already pretty good). Sharpness under optimal conditions isn't everything. We will have to wait for real reviews to see how it plays out in practice.