Canon EOS Rebel...

[newsense52]

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

[Waddizzle]

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@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

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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.

[ScottyP · Accepted solution]

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@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?

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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. 

[newsense52]

What is the fastest lens  ( model or name ) of  EOS model you know but not too expensive.

Considering use flash for indoor, auto ISO, no zooming after pointing to object, faster than the wink of eye.

[Waddizzle]

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@newsense52 wrote:

What is the fastest lens  ( model or name ) of  EOS model you know but not too expensive.

Considering use flash for indoor, auto ISO, no zooming after pointing to object, faster than the wink of eye.

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I have no answer for you until you can tell me this.  What are you trying to photograph?

If you do not want to pay top dollar, you are not going to get top performance.  Period.  Less costly lenses will sacrifice performance in one way or another.  Different lenses are better suited for some tasks than others. 

Again, what are you trying to photograph?

[ebiggs1]

"What is the fastest lens..."

OK this one, Canon EF 50mm f/1.8 STM Lens.  It is a little north of a hundred bucks.  There are few lenses faster than this 50mil at any price.  For example the Canon EF 50mm f/1.2L USM Lens, which is only marginaly faster, is $1400 bucks.

[jrhoffman75]

I think the OP means fastest focusing.

I would pick a USM motor zoom lens with wide paerture in the range that fits your needs.

The 17-55 f/2.8 EF-S comes to mind. Short on the long end, but since you are talking about flash you don't have that much distance range anyway. Couple that with a 70-200 f/4L zoom and you have a nice combo.

But as sevaral of us have said above, depending on what your goal is a Rebel may not be the best body.

[ebiggs1]

"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.

[Waddizzle]

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@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.

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The OP seems to like your 85mm suggestion.  That's not going to work with the built-in flash.  The lens will cast shadows.

[RobertTheFat]

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@Waddizzle wrote:

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@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.

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The OP seems to like your 85mm suggestion.  That's not going to work with the built-in flash.  The lens will cast shadows.

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

[newsense52]

Not all expensive lens have great performance.

For indoor stage shooting with moving persons with less lighting.