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Author Topic: EF 16-40 f/4L IS [CR1]  (Read 17104 times)

Flake

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Re: EF 16-40 f/4L IS [CR1]
« Reply #15 on: May 24, 2011, 04:35:01 PM »
Definitely been waiting for this, it's about time Canon showed it was capable of making a decent wide angle which can challenge Nikons supremacy.  Although the 14 - 24mm f/2.8 is a superb performer there are niggles such as the huge unprotected front element which cannot take a filter.  I want a lens which can do both these and also give a longer zoom range. 

The concerns I do have are in part similar to those for every other new lens - will Canon actually be able to deliver it within a reasonable timescale after announcing it, and will the price be comparable to the current model.  As a specific the usual wide angle concerns of corner resolution, flare, distortion, CA's etc etc.  Wide angle lenses are more critical than longer ones where subjects tend to be in the centre of the image.

I'm sure we are all waiting with baited breath!

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Re: EF 16-40 f/4L IS [CR1]
« Reply #15 on: May 24, 2011, 04:35:01 PM »

neuroanatomist

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Re: EF 16-40 f/4L IS [CR1]
« Reply #16 on: May 24, 2011, 04:42:08 PM »
If the IS is decent, it might more than make up for the difference.

I'm sure the IS will be decent (4 stops at least).  But it doesn't make up for the 1-stop difference if your subjects are moving.  Fine - a 16/17mm lens with 4-stop IS can be handheld down to 1 second (4 stops slower than 1/focal length).  But that's not going to help if your subject is moving.  Only a wider aperture (or flash) will do that.  Granted, one stop is not a lot - but it's the difference between 1/30 s (where involuntary motion in a posing subject can still cause a little blur) and 1/60 s (which will freeze that involuntary motion).

But isn't 4 stops IS better than one stop natural light? Going from an F4 with no IS to an F4 with modern, 4-stop IS makes it better than an older 2.8, right?

As Awinphoto stated, on short(ish) lenses, IS only helps with static subjects (on long lenses, even shutter speeds fast enough to stop many subjects are not enough to stop camera shake, and IS also helps with a stable viewfinder).

The point is that IS allows you to shoot at a slower shutter speed than otherwise possible based on how steady you can hold the camera.  The only kind of motion it counteracts is camera motion, IS does nothing to help subject motion - in fact, it can make subject motion worse (as in my example above - a moving subject will be a lot blurier with a 1 second exposure than with a 1/15 s exposure).  If you need a faster shutter speed to stop subject motion, you need a wider aperture, or a higher ISO.
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Flake

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Re: EF 16-40 f/4L IS [CR1]
« Reply #17 on: May 24, 2011, 05:09:53 PM »
A one second exposure would make motion blur and second curtain flash whilst hand holding!  It would perhaps even be possible to make a strobed image too without a tripod.  This is certainly not possible at the moment.

epsiloneri

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Re: EF 16-40 f/4L IS [CR1]
« Reply #18 on: May 24, 2011, 06:40:59 PM »
A one second exposure would make motion blur and second curtain flash whilst hand holding!  It would perhaps even be possible to make a strobed image too without a tripod.  This is certainly not possible at the moment.

This discussion made me wonder... The jitter amplitude from hand-holding a camera does not grow linearly with time; for short times it probably forms some sort of random walk (scaling like sqrt(time)), but for longer times there should be a limit where the amplitude doesn't increase anymore, and when IS reaches that limit, you should be able to hand hold a camera indefinitely (until you tire or batteries run out, that is). A 1 second exposure sounds like we're getting close to the "indefinite" limit. I mean, I don't think I move a hand-held camera more in 2 seconds than in 1 second, in particular if I can support myself against a wall or similar.


fotoray

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Re: EF 16-40 f/4L IS [CR1]
« Reply #19 on: May 24, 2011, 07:15:30 PM »
It's a pity they cold not make it a tad longer say 55mm or 60mm then it could be the perfect weather sealed standard zoom for 7D.  Current weather sealed options are 17-40 L, too short; 24-105 L and 24 - 70 L, not wide enough.

If you want this focal length range for a 7D, what's wrong with the EF-S 17-55 f/2.8?  I know, it's not an L lens.
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ronderick

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Re: EF 16-40 f/4L IS [CR1]
« Reply #20 on: May 24, 2011, 11:02:46 PM »
A 16-40 f/4L would be fine for me (even better, f/3.5).

At this range, IS would be nice, but I could live w/o it if it's going to make the lens bigger. The compact size and price of the 17-40 f/4L is what makes it a great lens on the cost-performance scale; I hope the new one won't overlook this advantage.

If not, I might as well wait for the Nikkor 14-24 f/2.8 ED challenger... It should be somewhere down the road (though I'd expect about 2 or 3 more years).
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VirtualRain

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Re: EF 16-40 f/4L IS [CR1]
« Reply #21 on: May 25, 2011, 03:42:04 AM »
This sounds great, but I'm tired of growing old waiting for new Canon products. It's what?... like a year from rumor to announcement, then another year to production?
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Re: EF 16-40 f/4L IS [CR1]
« Reply #21 on: May 25, 2011, 03:42:04 AM »

ronderick

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Re: EF 16-40 f/4L IS [CR1]
« Reply #22 on: May 25, 2011, 04:04:38 AM »
This sounds great, but I'm tired of growing old waiting for new Canon products. It's what?... like a year from rumor to announcement, then another year to production?

This year's the exception... who'd expect a major disaster to hit the main production center of cameras and have such a long after effect?

I'd say seeing production return in such a short time is pretty amazing already, given all the negative news about blackouts and power shortages.
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match14

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Re: EF 16-40 f/4L IS [CR1]
« Reply #23 on: May 25, 2011, 04:12:40 AM »
It's a pity they cold not make it a tad longer say 55mm or 60mm then it could be the perfect weather sealed standard zoom for 7D.  Current weather sealed options are 17-40 L, too short; 24-105 L and 24 - 70 L, not wide enough.

If you want this focal length range for a 7D, what's wrong with the EF-S 17-55 f/2.8?  I know, it's not an L lens.
17-55 is a great lens, but it is not sealed. I'm may end up getting one anyway.

NXT1000

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Re: EF 16-40 f/4L IS [CR1]
« Reply #24 on: May 25, 2011, 04:20:34 AM »
i doubt canon will put IS in their wide lense, even if they would do so, they will do it on f2.8 lens first. This is not making sense. Yes, it will make many people happy, but first, we want to see 24-70 f2.8 IS first.

Flake

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Re: EF 16-40 f/4L IS [CR1]
« Reply #25 on: May 25, 2011, 04:25:45 AM »
i doubt canon will put IS in their wide lense, even if they would do so, they will do it on f2.8 lens first. This is not making sense. Yes, it will make many people happy, but first, we want to see 24-70 f2.8 IS first.

Erm where do you get this opinion from?  Have you not looked at Nikons current range ?  They released a 16 - 35mm f/4 VR which was much appreciated.  Canon has no alternative to offer.  Nikons prices are always a little higher but this thing costs £850 ! much higher than the £570 of the 17 - 40mm f/4 so expect a price hike.

Nikon have not put VR on their wide angle f/2.8 so there's no much chance that Canon will be doing it either.

John Smith

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Re: EF 16-40 f/4L IS [CR1]
« Reply #26 on: May 25, 2011, 05:02:06 AM »
As a user of the current 17-40, I can assure you that corner resolution is not an issue to me. When i need resolution (landscapes etc), i use f/8-13 and I get very sharp images.
If this 16-40 IS hits the shops, I 'll definitely take it just for the IS!!!!

Even at f/11 there's plenty of room for improvement at the wide end.

akiskev

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Re: EF 16-40 f/4L IS [CR1]
« Reply #27 on: May 25, 2011, 08:59:30 AM »
As a user of the current 17-40, I can assure you that corner resolution is not an issue to me. When i need resolution (landscapes etc), i use f/8-13 and I get very sharp images.
If this 16-40 IS hits the shops, I 'll definitely take it just for the IS!!!!

Even at f/11 there's plenty of room for improvement at the wide end.

Sure there is, I just don't need it for my prints, even if they are 1 meter long.
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Re: EF 16-40 f/4L IS [CR1]
« Reply #27 on: May 25, 2011, 08:59:30 AM »

John Smith

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Re: EF 16-40 f/4L IS [CR1]
« Reply #28 on: May 26, 2011, 02:30:03 AM »
I don't see Canon releasing such a lens, it would even kill the 16-35 II if it is sharp wide open.

I don't really believe this rumor, but it would be a good lens for those who shoot both FF and CFx1.6. Make it 50/55mm and it would be perfect.

That excludes the possiblity of the 16-35mm f/2.8 being replaced with a wider f/2.8 lens.

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Re: EF 16-40 f/4L IS [CR1]
« Reply #29 on: May 26, 2011, 05:12:36 AM »
This would be a dream lens, as long as the size is kept to reasonable minimum.

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Re: EF 16-40 f/4L IS [CR1]
« Reply #29 on: May 26, 2011, 05:12:36 AM »