New from Sony

[havoc315]

a 70D most certainly can do continuous tracking, Canon's AI SERVO is probably the best in the business. It's why a lot of sports shooters use EOS 1DX.

I hope the a6000 is all Sony says it is.... competition is good for consumers! I still prefer the form factor of my EOS 7D (although it can get heavy), over the mirrorless options.

I haven't tried it... I was under the impression that the new live view on the 70d couldn't do continuos shooting, only single shot focus. I know it's traditional focus system can track well, but not the live view.

At least according to dpreview:
These tests are all very impressive, but Dual Pixel AF does have its problems, most notably to do with tracking a moving subject during continuous shooting. The 70D offers a 'Face Detect + Tracking' mode, in which it can follow your subject's face as they move around the frame, and keep them in focus. But if you combine this with continuous shooting - both high and low speed - the camera locks focus at the first frame, and doesn't attempt to refocus for successive shots. Worse still, the screen blacks out completely during continuous shooting, making the whole thing something of a guessing game, particularly when panning to follow a moving subject. This means that Dual Pixel AF is effectively limited to being a 'one shot' mode when shooting stills.

 

[SkaGoat]

By moving closer to the subject you also changing the perspective, and that makes it a different photograph. Use the full frame and crop, which is exactly what a crop sensor does, to make an equal comparison. People seem to want to make the smaller area captured by a crop camera more than it is.

I've used many different formats and it holds up when you keep all factors that affect the math equal. The problem is people try to make it more difficult with smaller sensors when they figure the crop factor, or 35mm equivalents with m4:3 and point and shoots.... but the math doesn't change.

Do smaller format cameras seem to have more depth of field? Yes. That's because the lenses you're using are shorter focal lengths than their 35mm format counterparts. This also affects the physical aperture size as well.

You're right, it is a different perspective.

You're missing the point.... Whether I have a FF or Crop, I'm going to fill the frame, I'm not going to shoot planning on cropping later, wasting valuable sensor space.

So if I'm shooting a butterfly using a FF body, I'm going to physically walk closer to the insect (than if I was using APS-C), to get the composition I want with the same lens, meaning I will have a thinner DOF.

On paper you're right, sensor size has nothing to do with DOF, but in practical use, when I'm out actually taking photos, it might matter.

 

[SkaGoat]

I haven't tried it... I was under the impression that the new live view on the 70d couldn't do continuos shooting, only single shot focus. I know it's traditional focus system can track well, but not the live view.

At least according to dpreview:
These tests are all very impressive, but Dual Pixel AF does have its problems, most notably to do with tracking a moving subject during continuous shooting. The 70D offers a 'Face Detect + Tracking' mode, in which it can follow your subject's face as they move around the frame, and keep them in focus. But if you combine this with continuous shooting - both high and low speed - the camera locks focus at the first frame, and doesn't attempt to refocus for successive shots. Worse still, the screen blacks out completely during continuous shooting, making the whole thing something of a guessing game, particularly when panning to follow a moving subject. This means that Dual Pixel AF is effectively limited to being a 'one shot' mode when shooting stills.

Then don't use live view to shoot moving subjects, use the OVF....

 

[havoc315]

Then don't use live view to shoot moving subjects, use the OVF....

You missed my whole point -- the Sony a6000 is the first mirrorless to claim to truly have superior AF over traditional dslrs.
I said other brands have also made progress -- the Canon 70d live view -- ie mirrorless -- matches mirrored AF for single shots.

In other words, the traditional advantages of mirror based dslrs are slipping away.

 

[fractal]

You missed my whole point -- the Sony a6000 is the first mirrorless to claim to truly have superior AF over traditional dslrs.
I said other brands have also made progress -- the Canon 70d live view -- ie mirrorless -- matches mirrored AF for single shots.

In other words, the traditional advantages of mirror based dslrs are slipping away.

Good video review of the Fuji X-T1. About 6minutes in they do a quick test of continuous AF.

http://www.youtube.com/watch?feature=player_embedded&v=nW8Cz_v3w1E

 

[photo_chick]

You're right, it is a different perspective.

You're missing the point.... Whether I have a FF or Crop, I'm going to fill the frame, I'm not going to shoot planning on cropping later, wasting valuable sensor space.

So if I'm shooting a butterfly using a FF body, I'm going to physically walk closer to the insect (than if I was using APS-C), to get the composition I want with the same lens, meaning I will have a thinner DOF.

On paper you're right, sensor size has nothing to do with DOF, but in practical use, when I'm out actually taking photos, it might matter.

I'm not missing your point. Just making the point that while it might cause you to shoot differently, the depth of field is actually the same. A different approach doesn't change the math.