Canon EF 24-70 F2.8L Question

[shuttlebox]

Just got my 24-70 yesterday, and was running a couple of test since then.

I've found that the AF of this lens to be slow, as compare to my 17-40, even the comsumer lens 28-135 IS. Anyone had this lens before? did you share the same experience?

According to a friend, this lens is not meant for sport photography therefore Canon compromise the speed for cost efficiency. But one think I've notice is that the AF scale meter did not spin as smoothly as it did on my other lens, and the AF meter spin beyond infinity mark when it tries to focus on infinity. Anyone got any idea on this?

I didn't get to test out other copy of the lens as I did not get tis lens from a shop , and I'm using a Canon 300D body. Anyone with similar setup?

thanks in advance.
Regards.

[ahbeng]

Originally Posted by shuttlebox Just got my 24-70 yesterday, and was running a couple of test since then. I've found that the AF of this lens to be slow, as compare to my 17-40, even the comsumer lens 28-135 IS. Anyone had this lens before? did you share the same experience? According to a friend, this lens is not meant for sport photography therefore Canon compromise the speed for cost efficiency. But one think I've notice is that the AF scale meter did not spin as smoothly as it did on my other lens, and the AF meter spin beyond infinity mark when it tries to focus on infinity. Anyone got any idea on this? I didn't get to test out other copy of the lens as I did not get tis lens from a shop , and I'm using a Canon 300D body. Anyone with similar setup? thanks in advance. Regards.

mine is just as fast as the 16-35 when using film body, the EOS3. the AF speed drops significantly when comes to digital bodies.

[mr_jason]

I used my EF 24-70mm f/2.8L on my 300D body for a couple of months, and young the AF speed to be one of the fastest. It is on no way slower than my EF 17-40mm f/4L.

[shuttlebox]

Originally Posted by mr_jason I used my EF 24-70mm f/2.8L on my 300D body for a couple of months, and young the AF speed to be one of the fastest. It is on no way slower than my EF 17-40mm f/4L.

Uh ho... perhaps tis calls for a visit to canon... warranty claim time... daim...

[dkw]

Originally Posted by mr_jason I used my EF 24-70mm f/2.8L on my 300D body for a couple of months, and young the AF speed to be one of the fastest. It is on no way slower than my EF 17-40mm f/4L.

Yup, very fast AF on my 300D and 10D, silent too.

[jeff49er]

Hi

welcome to the club

Where did u buy this lens?

Slow AF, slower than the 28-135 IS ? U sure u bot the real stuff? kekekek

[clive]

were u in low light condition? did the lens hunt alot?

[shuttlebox]

Originally Posted by clive were u in low light condition? did the lens hunt alot?

Room lighting.

When focusing on subject with high contrast, it does not hunt. but the duration it takes to obtain focus takes much longer than my 28-135 IS.

When I focus on an entire white wall to let it hunt, it hunt much slower than my 28-135 IS which have a focus meter of up to 10m, the 24-70 have up to 3m.

Wandering what is wrong

[jeff49er]

If the 28-135 outperforms the 24-70 L in terms of speed of AF, I cant imagine what the market repercussion will be. This is just preposterous.

So far owners of these lens have never complained about the AF speed of this lens and perhaps on a broad day light on sunday take a few pic to test out

[shuttlebox]

Originally Posted by jeff49er Hi welcome to the club Where did u buy this lens? Slow AF, slower than the 28-135 IS ? U sure u bot the real stuff? kekekek

... happy to join the club...

Got it from someone who wish to remain annoymous...

Not really sure if it's the real stuff... it's got the word Nikon printed on the side hahahahahahahahahahahaa...............

But seriously, AF is slower than my 28-135 IS

[shuttlebox]

Originally Posted by jeff49er Focus on a subject , not wall or something plain and u will feel the power of this lens

Focusing on the wall was intentionally to see how long it takes to do a full two sided hunt... but it only hunt one side?... hmm..

[dkw]

Originally Posted by shuttlebox ... happy to join the club... Got it from someone who wish to remain annoymous... Not really sure if it's the real stuff... it's got the word Nikon printed on the side hahahahahahahahahahahaa............... But seriously, AF is slower than my 28-135 IS

Could you do a rough test, maybe take an average of 3 timings to focus on high contrast/low contrast object and post here? At least we will have a frame of reference to help you.

Cheers,

[jeff49er]

Try some test shots tomorrow. If this lens is really slower than the 28-135 then there is likely some defect. Imagine a Corolla outpace a Porshe.

Then u have to check into the Canon clinic.

[shuttlebox]

Anyone free to meet up tomorrow over a cup of coffee (on me)? would REALLY like to benchmark my copy against yours... pls?... anyone?...

PM me or SMS me at 98475337. I'm free anytime, anywhere that please you.

Dunno how to post pic for comparison here...
but the speed with mine 24-70 is like... 1-2-3-Focus
while the 28-135 is like 1-2-Focus...

[shuttlebox]

no one? ?? ??

[clive]

me. if u dont mind =) i dont have any 24-70L but i have the time to see in real life how the problem looks like. i will bring 2 other f3.5-4.5 lenses for physical comparison. since 2molo is monday, then also can pop by harbour front to let canon service centre take a look.

[shuttlebox]

Originally Posted by clive me. if u dont mind =) i dont have any 24-70L but i have the time to see in real life how the problem looks like. i will bring 2 other f3.5-4.5 lenses for physical comparison. since 2molo is monday, then also can pop by harbour front to let canon service centre take a look.

Actually tat message was written yesterday, meant for today

Still ok with you? can look it through a cup of coffee or beer on me...

[clive]

later me n zek at the ntuc cosplay event thingy...u going? hehe..if not ok then monday oso can...keke..me bringing EF28-105/3.5 and EF20-35/3.5. kopi or beer no need...i chio u 100plus

[shuttlebox]

Originally Posted by clive later me n zek at the ntuc cosplay event thingy...u going? hehe..if not ok then monday oso can...keke..me bringing EF28-105/3.5 and EF20-35/3.5. kopi or beer no need...i chio u 100plus

NTUC Cosplay event? where's tat?? would like to come. SMS me on my mobile: 98475337??

[Amfibius]

I don't know what's wrong with your 24-70. I have a 24-70 and it is EASILY the fastest focusing lens I own - it's even faster than the 28-135IS (which I own, too).