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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 01 Oct 2012 (Monday) 08:33
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How important is "IS" on an Ultra-Wide?

 
Roxie2401
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Oct 01, 2012 08:33 |  #1

I know there are a lot of factors, shutter, ISO, hand-shake, etc. but how important is Image Stabilization on a lens, say 17-40 or 10-22 range?

My original 17-85 has IS as does my new 24-105 but I keep thinking the only reason the 17-85 had it was for the longer range.

I want to go wider & bump up to FF so I have been looking at the 17-40L and wonder if I will miss the IS at that range?

Thoughts? Examples? Suggestions of other UWA (Tokina 11-16, etc.)?

Thanks




  
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melcat
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Oct 01, 2012 08:50 |  #2

Generally (see exceptions below), on full frame you need to

- keep shutter speed above 1/n seconds, where the focal length is n mm, e.g. above 1/125 at 100mm, and above 1/25 at 25mm.

- AND keep shutter speed above 1/60 for somewhat motionless subjects like people posing, higher if there's any motion including body sway.

You can see that for most subjets the first becomes moot at short focal lengths, and it's the first that IS is designed to reduce the need for.

The exceptions to the general rule are fast moving subjects, vibration-prone places like ship decks, too much caffeine, enormous blowup etc., and some people can with practice hand hold at slower speeds.




  
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Nathan
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Oct 01, 2012 08:52 |  #3

melcat wrote in post #15064503 (external link)
The exceptions to the general rule are fast moving subjects

IS won't help you with fast moving subjects.


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Vixen89
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Oct 01, 2012 08:52 |  #4

I wouldn't say important...I have a 16-35 II and owned the 10-22 and 10-20 before that. I usually shoot the shutter speed 2x of the what the focal length of the lens is to prevent shakes. What camera body are you using? Crop / FF? There's a ton of UWA's out there and yer budget?


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melcat
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Oct 01, 2012 08:55 |  #5

Nathan wrote in post #15064510 (external link)
IS won't help you with fast moving subjects.

The rule had two parts, and the exception is to shoot *faster*.

Vixen89 wrote in post #15064511 (external link)
I think the general rule here is to keep the shutter speed 2x the focal length of the lens?

1.6x on 1.6 crop. OP is contemplating full frame. (There's no fundamental meaning to this, the numbers just happen to work at 24mm x 36mm).

Most landscape photographers also have a tripod when using a UWA usually too.

Foliage moves.




  
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Vixen89
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Oct 01, 2012 08:59 |  #6

melcat wrote in post #15064523 (external link)
The rule had two parts, and the exception is to shoot *faster*.

1.6x on crop. OP is contemplating full frame. (There's no fundamental meaning to this, the numbers just happen to work at 24mm x 36mm).

Foliage moves.

Yeah I'm not thinking this morning. I have shaky hands myself and don't let myself shoot at low speeds if I know it'll blur because of me and yes I agree foliage moves and everything else, but then wouldn't you wanna shoot at 1/400 or faster?


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Charlie
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Oct 01, 2012 09:12 |  #7

It's important, but more important is that you'll be going into the ultra wide territory. Depends on what you shoot. IS can give you relatively long exposures.... but doesnt exist in that bracket unless you go to nikon.


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Roxie2401
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Oct 01, 2012 09:24 |  #8

Vixen89 wrote in post #15064511 (external link)
I wouldn't say important...I have a 16-35 II and owned the 10-22 and 10-20 before that. I usually shoot the shutter speed 2x of the what the focal length of the lens is to prevent shakes. What camera body are you using? Crop / FF? There's a ton of UWA's out there and yer budget?


Currently shooting 7D - looking to add FF (5D MKIII) in the future. That's why I was looking at the Canon 17-40 - I realize it won't be "that" wide on the crop, but I found with the 17-85, 17 isn't all that bad either. Was also looking at the Tokina 12-24 (seems the 11-16 is a little too narrow). Lately, the 24-105 has been the general purpose but find that I am missing the wide end of what was the 17-85 lens.




  
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Oct 01, 2012 09:25 |  #9

As others have said, IS is probably less critical a feature on wide angle lenses compared to long lenses, but it still can be helpful. For example, I have some sharp handheld shots at ISO 12,800 and about 1/20 or 1/30 of sec. using an EF-S 15-85; even though it's relatively wide angle I don't think I would have gotten good results at 1/20 sec. without IS.


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Charlie
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Oct 01, 2012 09:36 |  #10

Roxie2401 wrote in post #15064641 (external link)
Currently shooting 7D - looking to add FF (5D MKIII) in the future. That's why I was looking at the Canon 17-40 - I realize it won't be "that" wide on the crop, but I found with the 17-85, 17 isn't all that bad either. Was also looking at the Tokina 12-24 (seems the 11-16 is a little too narrow). Lately, the 24-105 has been the general purpose but find that I am missing the wide end of what was the 17-85 lens.

I would suggest you go FF first before buying a 17-40 lens. the 24-105 on FF is even wider than your 17-85 on your 7D.


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Snydremark
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Oct 01, 2012 09:42 |  #11

I've never seen a need for IS on my 10-22; if I'm shooting in that focal range, I'm shooting from a tripod anyway.

As already noted, since keeping your shutter speed above thee 1/<focal length> suggestion is much easier to do with those lenses, IS is much less important with them.


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Vixen89
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Oct 01, 2012 09:48 |  #12

Charlie wrote in post #15064593 (external link)
It's important, but more important is that you'll be going into the ultra wide territory. Depends on what you shoot. IS can give you relatively long exposures.... but doesnt exist in that bracket unless you go to nikon.

Didn't know it even existed in that range, well kudos to Nikon for that!

Roxie2401 wrote in post #15064641 (external link)
Currently shooting 7D - looking to add FF (5D MKIII) in the future. That's why I was looking at the Canon 17-40 - I realize it won't be "that" wide on the crop, but I found with the 17-85, 17 isn't all that bad either. Was also looking at the Tokina 12-24 (seems the 11-16 is a little too narrow). Lately, the 24-105 has been the general purpose but find that I am missing the wide end of what was the 17-85 lens.

I don't recall correctly but I don't think the Tokina 12-24 works on the FF sensor, but I know the Sigma 12-24 II does! I think it's about the same price as the 17-40L. The 24mm side of the 24-105 is pretty wide but if you're like me you want it wider, thus having to buy a dedicated UWA for my 5D. I own the old school 24-80mm and I use it on my 5D every now and then. The 24mm side is too much of a normal range to me which is probably why I don't like it. I think it's awesome the 24-105 has IS but I'm not going to hold my breathe if it's not there either. I would like to emphasize anything past 100mm should have IS since it's longer/heavier. Well I guess it's just easier to either get a lens with IS or counter it with having a tripod. I mean once your camera is on a tripod you're supposed to turn off IS anyways so essentially it goes back to having no IS being okay. If you don't have IS just up the shutter speed + iso some more, after all since you're getting a 5DIII it's okay to bump the iso up!

I may or may not lost myself in this reply. Sorry for any confusion!

So do you have any buddies that will loan you a FF + 24-105 and a 17-40? You'd be able to tell then and there or go to the camera store if possible.


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mike_311
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Oct 01, 2012 10:26 |  #13

i have consistently handheld my 10-22 at 10mm at 1/20 or 1/10. the only reason IS would have helped me is if i want to stop down a bit , but that lens is pretty sharp wide open.

IS is more important on zoom lenses where 50ish is the loner length and 5.6 is the max aperture at that length.


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Earwax69
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Oct 01, 2012 10:28 |  #14

no need under 35mm on crop I'd say. Anyway, such a lens dont exist.


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Rush87
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Oct 01, 2012 10:38 |  #15

I'd love to have IS on a UWA lens, but it isn't available and isn't as useful as on a normal or telephoto zoom.




  
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How important is "IS" on an Ultra-Wide?
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