I have seen posts where a Canon 10-22 lens was converted to be used from about 15mm to 22mm on a full frame body by replacing the rear baffle (below 15 mm would risk hitting the mirror). If converted and used with the lens adapter, would the 10-22 lens work on the a7R?
CameraBuff wrote:
I have seen posts where a Canon 10-22 lens was converted to be used from about 15mm to 22mm on a full frame body by replacing the rear baffle (below 15 mm would risk hitting the mirror). If converted and used with the lens adapter, would the 10-22 lens work on the a7R?
Unconverted EF-S lenses and EF converter will mate well with any mirrorless cam. No issue here beside your FF sensor will be hungry for light
So will they test the Sony's AF with Canon glass as well as the 1DMk3's was maybe someone running toward the camera in harsh light..oh i forgot that was for the Canon bodies only..
Oh AF doesnt count its only the 2 extra stops of DR that matters..
The assumption Sony can make Canon lenses AF as well as the Mk3 and 1Dx module is at best wishful thinking but hey you guys im sure will end up with the best unfocused images in history..oh i forgot its all about DR..
If you are a sports/war/fast action/BIF kind of photographer then using the A7s with EF glass is unlikely to satisfy in the AF dept.
If you are a landscape/product/portrait kind of photographer then using the A7s with EF glass is likely to satisfy in the AF dept.
Pick which of the above categories describes you and the probable AF outcome presents itself.
Of course I only suspect this, I haven't seen any actual AF tests of the Sony with Canon glass.
In terms of DR of course, my limited understanding is that Sony rule sensor design and fab, so whatever they are using in the A7 is likely to be king of the hill. That is what is so exciting if the A7s fit your needs and you have EF glass to adapt. So is the low cost. I'm willing to bet that until the release of the high resolution Sony, Canon had planned to release their high res sensor in a $5000 1D series body, telling us to "pay to play" (of course I don't know this was the case, but I have a strong hunch that way). Not a sensible policy now Sony have moved the price goalposts downwards.
I think it's obvious that the AF with Canon lenses will not be very good. Using those lenses on a mirrorless with an adapter will make the AF performance much worse than on a native EOS body. For landscape and similar stuff I'm sure it will be ok.
And DxOmark already wrote that the sensor was good. But not king of the Hill like David wrote. That's the Nikon bodies
It is the highest DxOMark rated camera that you can mount an EF lens on (via an adapter.) Its overall score tied the D800 (95 points) and it was one point behind the D800E (96 points.)
D800E 96 points
a7R 95 points
D800 95 points
1DX 82 points (21st)
5D III 81 points (25th)
DxO is saying the sensor in the a7R is the SECOND BEST THEY HAVE EVER TESTED. One can argue over the granular measurements that make up that score, whether or not DxOMark is a good system to measure sensor performance (yada yada yada), but at this point it's the only "scientific" comparison we have right now.
Yes, AF will be worse than the 1DX and 5D III. I think David summarizes well who will find AF acceptable and who will not (based on what type of shooting they do.)
Canon has a sensor problem, especially for those who are looking for more DR and resolution. Right now it's the achilles heel in their lineup. It does not mean they are not top of the game on AF, or in other areas....it just means they are vulnerable right now when it comes to certain photographic disciplines (like landscape photography.) If AF is low in the list of importance for that segment, it's hard to justify the price to upgrade from a 5D II to a 5D III for example (really applies to me...incremental sensor improvements..but vast AF improvements.) While the 5D III is a much better camera overall, the areas of dramatic improvement are low priority in the list of things that are important to me.
So bottom line this is no way people are going to agree on this as it all depends on the priority one places on each of these features. Want a better balanced solution, get the 5D III...want to shoot sports or BiF....get the 5D III....want more resolution and DR....get the a7R....want a smaller camera....get the a7R.....want better battery life...get the 5D III. You could do this for every measurable feature.
If Canon can get out of the rut they are in with sensor design, then the only real gap is no FF mirrorless solution. Which seems to be less of a challenge to overcome then sensor design.
While adding PDAF to the last APS-C sensor is an improvement, it's not the breakthrough in image performance. When and if they close the gap, the conversation changes.
Thats funny, I thought the Nikons used Sony sensors!
They do but Nikon make those sensors even better. It's not like the sensor and processor are exactly the same. If they where the test results would be the same also.
The only sensible option for Canon is to put a 30+mp sensor with circa 14 stops of DR into a 5D type body for a "reasonable" price (around the current 5D3 price). As we can see the A7 bodies seem to be a little limited AF wise (as yet to be fully determined) and battery wise. IMO Canon could dominate the market if they get it right with the sensor performance in an excellent body with no obvious weaknesses like the D800 live view. Contrary to some opinion, the 5D3 body is very well built, very well designed. Stick the new sensor in that body and the camera IS a winner.
dehowie wrote:
So will they test the Sony's AF with Canon glass as well as the 1DMk3's was maybe someone running toward the camera in harsh light..oh i forgot that was for the Canon bodies only..
Oh AF doesnt count its only the 2 extra stops of DR that matters..
The assumption Sony can make Canon lenses AF as well as the Mk3 and 1Dx module is at best wishful thinking but hey you guys im sure will end up with the best unfocused images in history..oh i forgot its all about DR..
Yes...it is all about the sensor in this camera and the ability to use my collection of Canon glass with this great sensor. Is this hard for you to understand? This does not replace my Canon cameras...just augments them giving me much more abilities for my landscape photography...which by the way I use manual focus live view with my Canon cameras.
So yes...it is all about DR and large pixel count.
Bones74 wrote:
The only sensible option for Canon is to put a 30+mp sensor with circa 14 stops of DR into a 5D type body for a "reasonable" price (around the current 5D3 price).
That would be the 5D IV, but we have to wait a while.
I'm all with Chez ...
I'm waiting for a Canon bodie that would provide me high DR, high resolution at low iso for my Canon lenses. Sure I would go for a 1Dx even at 1img/s with 40mp high DR, with iso range 12-200 ! But Canon doesn't want to sell it, and I'm bored about waiting ...
So yes, it is all about high res high dr, for large print regarding myself.
On a shooting day, I can come back home with ten or twenty raws on my card, very rarely more than that. And live view with focus peaking would be nice enough.
So yes I would keep my Canon 1 for common use, but AF and battery life is irrelevant at this price tag. Of course I wouldn't say that if I were talking about a 7k€ 1DxS but where is Canon actually ? Nowhere regarding sensors, but very good lenses ...
So yes, show us what a7r + smartIII + EF lenses can do ! When I can have some raw like this loading into lightroom, if it raw files convince me I will fire the order button the same day ! Even with ten shot per battery, just buy another one lol ! We don't need machine guns filling all cards in a few seconds ... We want high res best IQ !
chez wrote:
Yes...it is all about the sensor in this camera and the ability to use my collection of Canon glass with this great sensor. Is this hard for you to understand? This does not replace my Canon cameras...just augments them giving me much more abilities for my landscape photography...which by the way I use manual focus live view with my Canon cameras.
So yes...it is all about DR and large pixel count.
That's for your specific use, others like myself were interested in the A7 for general photography where AF is needed. I have zero interest in landscape photography, I was interested in a camera that as a base would provide lots of flexibility for family orientated photography (lens use with adapters, including smaller MF glass). Even with native lenses the AF isn't looking that great so I'm back to picking up a 5D3 next and I'll see how the A7 line evolves.
For landscapes I can see it's an attractive option, but my initial excitement has faded now.
