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Author Topic: New f/4L EF Zoom [CR1]  (Read 14536 times)

Waleed Essam

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Re: New f/4L EF Zoom [CR1]
« Reply #15 on: July 21, 2010, 04:36:16 AM »
Hmm... 16-50 F4L IS... feels like a boring lens really. As you said, a 17-40 or 16-35 owner won't probably consider buying it.

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Re: New f/4L EF Zoom [CR1]
« Reply #15 on: July 21, 2010, 04:36:16 AM »

Woody

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Re: New f/4L EF Zoom [CR1]
« Reply #16 on: July 21, 2010, 04:47:48 AM »
Hmm... 16-50 F4L IS... feels like a boring lens really. As you said, a 17-40 or 16-35 owner won't probably consider buying it.

Agreed it won't be an exciting lens, but it's more like an optical upgrade (hopefully) of the pathetic 17-40 f/4L which has horrible corners in FF.

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Re: New f/4L EF Zoom [CR1]
« Reply #17 on: July 21, 2010, 04:54:02 AM »
16-50L HIS... This makes some sense as a successor to the 17-40L, but not with hybrid IS. I can see that "normal" angular IS might be useful in very low light conditions.

But hybrid IS on a wide angle lens? Hybrid IS also compensates for linear movements of the camera. This is important/useful when those movements reach a certain percentage of the object's size.  That's why HIS was first included in a macro lens, which can image very small objects. Say you want stability of 1 pixel on a 25mm object at 3000 pixels image height, that makes about 25mm/3000=8 microns camera shake. No coffee today! I could eventually see the usefulness on a close-focusing supertele, shooting 10cm-sized birds

A wide angle is the last place where HIS belongs. How much do you have to shake the camera to reach a percentage of the size of a tree or a skyscraper? If your skyscraper is 100m tall, the 1 pixel shake is 100m/3000 = 33cm. Even Parkinson himself does not need HIS for that, normal IS will do. In fact, it is all but impossible that the HIS corrects such a large movement.


neuroanatomist

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Re: New f/4L EF Zoom [CR1]
« Reply #18 on: July 21, 2010, 08:11:32 AM »
Even Parkinson himself does not need HIS for that, normal IS will do.

Well, like most neurological disorders, the name of the disease is derived from the physician who first described the symptoms.  So, Alois Alzheimer had excellent memory, and James Parkinson had hands as steady as anyone else. 

Other than that, though, I agree - H-IS on a wide angle?!?  No point.  Except maybe from a marketing standpoint.
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AverageJoe

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Re: New f/4L EF Zoom [CR1]
« Reply #19 on: July 21, 2010, 10:02:47 AM »
I'd agree with John on this one, but I'd also like to see what amount of barrel distortion there would be at 14mm. Also, the 50mm end of this rumored lens probably wouldn't get much use from my perspective. I'd rather use the 24-70mm or 50 1.4 for that focal range.

Steve Todd

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Re: New f/4L EF Zoom [CR1]
« Reply #20 on: July 21, 2010, 10:24:22 AM »
The EF 28-200 has been around forever and could use a makeover (add IS).  Maybe replacing it with a 24-200 or 24-250 Would be nice.  In the film days and before the great EF 28-300 (heavy but outstanding performer) came along, this was my choice for travel and general shooting with my EOS-1V and 1n bodies.  Today a lens like that would be a great walk around/street lens and an even better choice than the very good EF 24-105!
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stark-arts

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Re: New f/4L EF Zoom [CR1]
« Reply #21 on: July 21, 2010, 11:23:06 AM »
I would be a bit worried about the size of this new 16-50L IS.

I think the most notable advantage of the 17-40 is its compact size. However, if the evolution would involve a change similar to 16-35L I to 16-35 LII... (and don't forget how IS tends to make the lens bigger)  :-\

Can you show us a lens that is bigger due to IS? Not one that I can think of - I could be wrong on this.
I also don't believe that 1 mm at front end and 10 at long end will greatly increase the size of the lens. it would be smaller than the 17-55 2.8 so it can't be too big...

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Re: New f/4L EF Zoom [CR1]
« Reply #21 on: July 21, 2010, 11:23:06 AM »

scalesusa

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Re: New f/4L EF Zoom [CR1]
« Reply #22 on: July 21, 2010, 12:33:29 PM »
I've had a 17-40mm L for about 2 years now, and have never warmed up to it.  It focuses fine and all that, but is not particularly sharp, even stopped down.

I'd be interested in a updated IS version for my FF and 1D MK III cameras.

mcgrattan

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Re: New f/4L EF Zoom [CR1]
« Reply #23 on: July 21, 2010, 02:42:59 PM »
Perfect walkabout for APS-H sensors

match14

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Re: New f/4L EF Zoom [CR1]
« Reply #24 on: July 21, 2010, 02:58:23 PM »
I have a feeling that his lens could turn out to be a 15-70mm f/4.  APS-C users have been longing for a crop equivalent of the 24-105mm f/4L for ages and a 15-70mm would be equivalent to 24-112mm on a crop body.  Of course, many people say that f/4 is not fast enough on a crop but there are lots people using the 24-105mm on crop right now and are happy but wish it were wider.  I would be tempted to say that this would be an EF-S lens but I feel that this lens would be more expensive than the 15-85 and therefore would not be a big seller compared to that lens.  Therefore, I think that this would be an EF 15-70mm f/4L IS USM, which could replace the 17-40 f/4.  This way crop users wanting a weather sealed pro built lens would have a great standard lens with a better range than the EF-S 17-55mm f/2.8 IS USM, and if those users upgraded to full frame or decided to use two bodies, one crop the other full frame, the lens would become a wide angle zoom.  Granted there would be terrible distortion on full frame at 15mm but the lens could be used on full frame for anyone taking their first step upgrading from crop to full frame.

Of course, the exact focal lengths I have stated maybe wrong so it could be 15-60mm rather than 15-70mm but I do see it starting at 15mm and ending at either 60mm or 70mm.

So it think the lens will turn out to be either an EF 15-60mm f/4L IS USM or and EF 15-70 f/4L IS USM.  I know many people would hope it was an EF-S lens but as I have said, it would be to close to the EF-S 15-85mm.

mrfig

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Re: New f/4L EF Zoom [CR1]
« Reply #25 on: July 21, 2010, 06:16:36 PM »
The original comment......

"With such high ISO performance now and obviously improving in the future, is a wideangle zoom at f/2.8 have much of a point anymore?"

Your kidding right?!?  For wide angle lenses wider apatures are more critical than ever if you want to compress your depth of field!!

ronderick

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Re: New f/4L EF Zoom [CR1]
« Reply #26 on: July 22, 2010, 01:34:26 AM »
I would be a bit worried about the size of this new 16-50L IS.

I think the most notable advantage of the 17-40 is its compact size. However, if the evolution would involve a change similar to 16-35L I to 16-35 LII... (and don't forget how IS tends to make the lens bigger)  :-\

Can you show us a lens that is bigger due to IS? Not one that I can think of - I could be wrong on this.
I also don't believe that 1 mm at front end and 10 at long end will greatly increase the size of the lens. it would be smaller than the 17-55 2.8 so it can't be too big...

How can putting on additional components not affect the size and weight?

70-200 f/2.8L USM              84.6mm x 193.6mm, 1310g
70-200 f/2.8L IS USM         86.2mm x 197mm, 1470g
(*stats from Canon USA website)

I haven't compared the two side-by-side, but any extra weight accounts for a big difference at the end of the day (as for whether you can tell the difference of a several mm in dimension, that's subjective).

However, if 16-50 f/4 L was indeed to come, my bet is there'll be notable differences, since its both adding IS and focal length. We'd be lucky if Canon keeps the filter size at 77 *shrug*
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muteteh

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Re: New f/4L EF Zoom [CR1]
« Reply #27 on: July 22, 2010, 05:31:29 AM »
I hope big things are coming.

Per the EF Lens chronology, I would guess we can expect three more lenses around photokina.

Personally, I hope for a new circular fisheye. A new ultrawide lens a-la Nikkor 14-24 or Sigma 12-24 would be nice.

Mostly, I wonder what Canon plans to do with it's prime lenses. IMHO, a good example would be the 24mm f/2.8 and 28mm f/2.8 are not sharper or faster than the EF 24-70mm, and do not feature USM. I think it's about time Canon re-did it's cheaper 20mm-24mm-28mm-35mm primes with improved optics, f/1.8 aperture, and USM.
« Last Edit: July 22, 2010, 07:48:07 AM by muteteh »

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Re: New f/4L EF Zoom [CR1]
« Reply #27 on: July 22, 2010, 05:31:29 AM »

Woody

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Re: New f/4L EF Zoom [CR1]
« Reply #28 on: July 22, 2010, 05:38:44 AM »
How can putting on additional components not affect the size and weight?
70-200 f/2.8L USM              84.6mm x 193.6mm, 1310g
70-200 f/2.8L IS USM         86.2mm x 197mm, 1470g

But the amount added can vary from lens to lens:

a) 70-200 f/4 without and with IS: 705 to 760 g
b) 100 f/2.8 macro without and with IS: 600 to 625 g

In the two examples listed above, the increase is very slight (about 4 to 8%).

pierlux

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Re: New f/4L EF Zoom [CR1]
« Reply #29 on: July 22, 2010, 08:31:32 AM »
With such high ISO performance now and obviously improving in the future, is a wideangle zoom at f/2.8 have much of a point anymore?

Why not? Especially considering that stopping down to f/4 a f/2.8 wideangle zoom should yield better image quality than a f/4 wide open. That said, a replacement of the 17-40  f/4L USM is absolutely possible. Most of the official Canon websites worldwide (except Canon USA, Canon Canada and a few others) indicate the 17-40 being especially suited for crop sensors, though being an EF lens (yes, they really explicitly state this!). Which is a mild way to say that it sucks wide open on a FF body.

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Re: New f/4L EF Zoom [CR1]
« Reply #29 on: July 22, 2010, 08:31:32 AM »