AF in Live view in EOS 700D (REBEL T51) and EOS 100D ( Rebel SL1) are the same ?

Hi everyone :

First I apologize  for this long message.

I am just trying to figure out if there are differences between the Rebel T5i and the Rebel SL1 ( 700D and 100D ) ,as far as autofocus in  live view is concerned.

In the page of the review of the T5i  ,700D  one can read :

http://www.dpreview.com/reviews/canon-eos-700d-rebel-t5i/27

Slow 'hybrid AF' performance in live view and video modes (compared to mirrorless competition) .

....

" for users that are far more familiar with composing via an LCD screen than a viewfinder, live view performance is of no small concern. Of course the camera must still offer users a path to a more traditional DSLR-like experience, without which, they would be hard pressed to resist the temptation of a physically smaller 'mirrorless' camera.

The EOS 650D was Canon's attempt to meet these challenges head on, with features aimed at improving its live view and video performance, which have been carried into the EOS 700D. One of the most noteworthy of these is the ability to offer continuous AF tracking while recording movies.

This is made possible by Canon's 'Hybrid CMOS' sensor that includes pixels dedicated to phase detection autofocus. The Hybrid AF system uses these to quickly set the lens to roughly the correct distance, then uses contrast detection AF to fine-tune focus. In theory, this should provide faster and more certain focusing for live view and video shooting compared to Canon models which rely on CDAF alone. You can read a more detailed explanation of this technology and see it in action on theAF performance page of the EOS 650D review. ".

End of quote .

In the Page of the Review of the Rebel SL1, 100D one can read

http://www.dpreview.com/reviews/canon-eos-100d-rebel-sl1/14

EOS 100D live view autofocus : " Video quality is significantly improved thanks to the Hybrid AF II autofocus system, which adds the missing element that made so many of the SL1's predecessors too difficult to use for video. Combined with the new 18-55mm STM lens, having a usable, quiet autofocus system makes video capture suitable for consumer users. Face tracking worked very well, as did touch autofocus, and the STM lens did its work quickly and quietly.".

From canon website

Canon develops new Dual Pixel CMOS AF technology for significantly improved autofocus....

http://www.canon.com/news/2013/jul02e.html

Hybrid CMOS AF and Hybrid CMOS AF II
Hybrid CMOS AF is an AF method employed in entry-level EOS digital SLR cameras and the EOS M compact-system camera that delivers enhanced focusing speed during Live View shooting and when shooting movies. Combining fast contrast AF and high-accuracy phase-difference AF, Hybrid CMOS AF makes possible faster focusing performance, quickly measuring the subject distance using the dedicated phase-difference AF image element embedded in the CMOS sensor (focal plane) and completing the process with extreme accuracy using contrast AF. The EOS Kiss X7 (EOS Rebel SL1 or EOS 100D in other regions) features Hybrid CMOS AF II, which makes use of an imaging sensor that supports AF across a wide area spanning approximately 80% vertically and horizontally of the shooting area.".

Judging by this information the t51 has the hybrid CMOS AF System and the SL1 has the Hybrid CMOS AF ll .

Is this conclusion right ?

Thank you  for reading

from cameralabs review:

In terms of speed, Live View AF on the EOS SL1 / 100D felt a little quicker than previous Canon DSLRs, not to mention Canon's own EOS M, but remained noticeably slower than its viewfinder AF system along with the fastest mirror-less models, such as those from Olympus, Panasonic and Sony. For all the hype over the hybrid AF system, I also found the SL1 / 100D would search back and forth as much in Live View as a 100% contrast-based system such as those on the Olympus and Panasonic mirror-less cameras. It's also worth noting the SL1 / 100D's AF system in Live View requires brighter conditions than the main viewfinder based system, so instead of working down to -0.5 EV, it operates at a minimum of 1 EV. Again compare that to the -3 EV of the Lumix G6 which is a 100% Live View system.

pcake wrote:

from cameralabs review:

In terms of speed, Live View AF on the EOS SL1 / 100D felt a little quicker than previous Canon DSLRs, not to mention Canon's own EOS M, but remained noticeably slower than its viewfinder AF system along with the fastest mirror-less models, such as those from Olympus, Panasonic and Sony. For all the hype over the hybrid AF system, I also found the SL1 / 100D would search back and forth as much in Live View as a 100% contrast-based system such as those on the Olympus and Panasonic mirror-less cameras. It's also worth noting the SL1 / 100D's AF system in Live View requires brighter conditions than the main viewfinder based system, so instead of working down to -0.5 EV, it operates at a minimum of 1 EV. Again compare that to the -3 EV of the Lumix G6 which is a 100% Live View system.

Thank you. So I guess we can confirm that the 700D and  the 100D use indeed diferent AF systems.

Thanks for your answer.

BTW I have a canon EOS-M  .I love it. Its image is much much better than sony A500, Sony A550 . ( in terms of color accuracy , sharpness and white balance under artificial light ).

I noticed that my SL1 hunts (focuses in and out) as much as my 7D so I am not sure its a whole lot better than my 7D. And that's using the 18-55 mm STM lens on the SL1.

Gary

By pure chance I came across a very informative review of the Canon SL1 , in Amazon.com comments.

Quote :

"In the T3i and prior, Live View focusing from the rear LCD was achieved by contrast-detect. This method is vastly slower than phase-detect and, in Canon's DSLR implementation, isn't capable of tracking motion in movies. It's reasonably quick and quite accurate with stills. It isn't possible to use the main phase-detect array without interrupting Live View because a mirror gets in the way.

The T4i/T5i added a second phase-detect system integrated into the imaging sensor itself that boosted acquisition speed and improved motion tracking to mediocre/adequate levels, but only for the center 9% of the frame. The SL1 expands this system to 64% frame coverage. The result is significantly more confidence with continuous autofocus in movies. With off-center subjects, it hunts (bringing the scene in and out of focus) much less than the T4i/T5i.

Here's the contrast-detect breakdown:

LV, stills, static: reasonably fast and accurate over the whole frame
LV, stills, movement: slow, accurate when it can keep up
LV, movies, static: reasonably fast, occasional hunting
LV, movies, movement: slow, accurate when it can keep up

Motion tracking is still short of exceptional. STM lenses (which use a stepper motor instead of standard USM or a noisy micro-motor) work more quickly and precisely than non-STM lenses. They'll track slow, undemanding subjects and faces. For more challenging movement, either prefocus, manually focus, or jump to the next performance tier comprised of Sony's 'translucent mirror' DSLRs, many mirrorless bodies (e.g., Panasonic G/GH), and Canon's own 70D. The SL1 has no focusing aids (e.g., focus peaking) for Live View except full-screen zoom. Focusing accurately by hand on a moving target is very challenging.".

...........

LENSES:

The 18-55/3.5-5.6 STM is a stellar optic. Focus is as fast as the camera allows, near-silent, and inaudible in movies, as is the IS system. If you upgrade, it'll be for speed, a different range, or perhaps more contrast, not because it isn't sharp enough. The 18-135/3.5-5.6 STM is equally impressive, though about an inch longer and twice the weight.

Light and small primes are well-suited to this body. The 40/2.8 STM, 50/1.8, 28/1.8, and 28/2.8 are all more compact than the kit lens. Larger lenses work as with any other EOS body, though some will be slightly more awkward when you're trying to adjust the zoom ring and support the rig from under the lens at the same time.

D. Alexander.".

Read the full review of the SL1 by D. Alexander here.

A great read, not boring.

http://www.amazon.com/review/R220987TBNN8XP/ref=cm_cr_pr_viewpnt#R220987TBNN8XP

I find the live view autofocus on the canon 100D really slow, but I never used a 700D or any other canon camera before, that and no tilt screen and only 25/24fps full hd are my main grips with it.

pew pew wrote:

I find the live view autofocus on the canon 100D really slow, but I never used a 700D or any other canon camera before, that and no tilt screen and only 25/24fps full hd are my main grips with it.

Thank you for your feedback.

I have to say I love my EOS-M.

Its handy..,colors are very good ( even according to imaging resource) ,

"
The Canon EOS M's hue accuracy is quite good, much better than average.

.........

Average "delta-C" color error after correction for saturation at base ISO is only 3.75, which is very good. Hue is "what color" the color is."

the F2 lens is wide and fast..., in short , a gem of a camera.

Click here to read review