Canon Community

newsense52 · ‎12-14-2016

What model of Rebel has the fastest autofocus set in auto mode, indoor photography.

ScottyP · ‎12-15-2016

@newsense52 wrote:
Do you mean to say the bigger the lens diameter is slower than the smaller lens when we set to autofocus?
What I am trying to view is that when you focus to moving object, how soon it can stabilize the focus?

No. Different lenses perform differently at different tasks.

The excellent 85 f/1.2 L gives beautiful images with shallow depth of field and creamy out of focus highlights, which is what it was designed for. The trade offs are a very high price, a heavy weight (if you mind weight) and very slow autofocus.

The 85 f/1.4 focuses faster, weighs very little and costs a fraction of the price. The trade offs are slightly less beautiful image quality, slightly less thin depth of field and a bit more purple fringing.

Ernie points out how in photography everything tends to be a trade off. A lens specifically designed for one thing may have to give up some other ability or quality. The optical designs of these lenses are really complex.

Scott

Canon 5d mk 4, Canon 6D, EF 70-200mm L f/2.8 IS mk2; EF 16-35 f/2.8 L mk. III; Sigma 35mm f/1.4 "Art" EF 100mm f/2.8L Macro; EF 85mm f/1.8; EF 1.4x extender mk. 3; EF 24-105 f/4 L; EF-S 17-55mm f/2.8 IS; 3x Phottix Mitros+ speedlites

Why do so many people say "FER-tographer"? Do they take "fertographs"?

View solution in original post

Waddizzle · ‎12-17-2016

@newsense52 wrote:
Not all expensive lens have great performance.
For indoor stage shooting with moving persons with less lighting.

Fastest auto focus should go the same as fastest stabilizer without zooming the object.
Suggest a lens that best describe of what I am looking for.

Not all expensive lenses have great performance in all ways that can be measured. But, most all expensive lenses will outperform inexpensive lenses in most ways that can be measured.

If you're referring to shooting video under low light conditions, then a Rebel camera body will definitely be a factor in the quality of the video that you capture, if not THE limiting factor.

Rebel camera bodies are not known for their low light performance for shooting stills. Because of that fact, Rebels are not known for excelling at capturing video under low light conditions, either.

Rebel bodies are not kinown for their AF performance, either. The single most limiting factor in AF performance in Rebel camera bodies are the number and type of AF points. Rebel bodies are good for new DSLR users. They are not for the demanding camera enthusiast, although the T6s comes close.

Rebels are not known for the performance of their built-in flash units, either. The built-in flash will not be very useful shooting subjects much more than 10 feet [ about 3 meters] away.

As far as a lens suggestion to capture images on a poorly lit stage, I'd suggest that you look for a lens that has a wide aperture, first and foremost. If you want to avoid 'zooming the object", then I would next suggest that you look for a focal length of less than 35mm.

Finally, if you want a wide aperture, a short focal length, AND inexpensive, then you're going to have to sacrifice having Image Stabilization, as well as, Auto Focus. Canon does not make such a lens. A good example of such a lens would be a Rokinon 14mm T3.1 lens. Rokinon also makes a lens for APS-C bodies only, the 16mm T2.2 lens. Either lens can be focused to what is known as the "hyperfocal distance", which will cause everything beyond a few feet to be in focus, eliminating the need to adjust focus, at all.

--------------------------------------------------------
"The right mouse button is your friend."

View solution in original post

RobertTheFat · ‎12-16-2016

@Waddizzle wrote:
@ebiggs1 wrote:
"I think the OP means fastest focusing."

Perhaps but the 50mill will focus as fast or faster in low light than the 17-55 f2.8 or at least you will need a real good stop watch to tell the difference. And the lowest cost part there is no question.
The OP seems to like your 85mm suggestion. That's not going to work with the built-in flash. The lens will cast shadows.

So will the 17-55 f/2.8. It does on a 7D, which I believe is larger than any Rebel.

Bob
Philadelphia, Pennsylvania USA

newsense52 · ‎12-17-2016

Fastest auto focus should go the same as fastest stabilizer without zooming the object.

Suggest a lens that best describe of what I am looking for.

Waddizzle · ‎12-14-2016

@newsense52 wrote:
What model of Rebel has the fastest autofocus set in auto mode, indoor photography.

Unless you buy a manufacturer's top-of-the-line, flagship camera models, any camera you buy will sacrifice performance in one or more areas. Rebel cameras are geared towards entry level, DSLR camera users.

--------------------------------------------------------
"The right mouse button is your friend."

jrhoffman75 · ‎12-14-2016

If you are limiting your question to Rebels it would be the T6s.

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic

newsense52 · ‎12-14-2016

What is the fastest shutter speed of Rebel T5i model?

1/2500, 1/3200 seconds.

The info that match the flash firing.

Thanks

Waddizzle · ‎12-14-2016

@newsense52 wrote:
What is the fastest shutter speed of Rebel T5i model?
1/2500, 1/3200 seconds.
The info that match the flash firing.
Thanks

I believe the fastest shutter speed for the T5i is 1/4000 of a second. Check the specifications for the rest.

--------------------------------------------------------
"The right mouse button is your friend."

kvbarkley · ‎12-15-2016

What do you mean by "match the flash firing"? On the T6S the max sync speed is 1/200 second. Even though the flash is much quicker than this. Canon flashes have HSS (High Speed Sync) which flashes many times very quickly to allow for faster shutter speeds (above 1/200).

Waddizzle · ‎12-15-2016

@newsense52 wrote:
What is the fastest shutter speed of Rebel T5i model?
1/2500, 1/3200 seconds.
The info that match the flash firing.
Thanks

What sort of moving subject are you trying photograph with a flash indoors? Sounds like a blurred shot to me. What lens would you be using? For fast moving objects you probably need a fast [f/2.8 or better] lens.

For sports photography, you generally do not want to use a flash, not at all. A flash blinds athletes, which raises the risk of serious injuries. I'd say the same for wildlife, too. A flash would probably scare the daylights out of wildlife. Camera noise is bad enough as it is.

If you want a high performance camera body, then you probably don't want a Rebel camera body. Consider the 80D, or even better the 7D Mark II. Definitely not a T5i, for high performance photography.

--------------------------------------------------------
"The right mouse button is your friend."

ebiggs1 · ‎12-15-2016

"What model of Rebel has the fastest autofocus set in auto mode, indoor photography."

Your question is two fold. Like was advised, the lens has a great deal to do with how fast a camera can achieve AF. Never the less, a newer camera will AF faster and better than an older model. This would indicate the newest Rebel family of T6(x) models.

However, if you couple it with an ef 85mm f1.2L for instance it will AF more slowly than it with an ef 85mm F1.8 lens. In photography you always 'give the get'.

EB
EOS 1DX and 1D Mk IV and less lenses then before!

newsense52 · ‎12-15-2016

Do you mean to say the bigger the lens diameter is slower than the smaller lens when we set to autofocus?

What I am trying to view is that when you focus to moving object, how soon it can stabilize the focus?

Canon Community

Canon EOS Rebel...