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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 26 Dec 2010 (Sunday) 22:45
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Primes and IS?

 
Cokeman
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Dec 26, 2010 22:45 |  #1

Is there a good reason that there aren't more prime lenses with image stabilization? I understand that with wider apertures, you can shoot with faster shutter speeds, which can negate shaky blur... but there are times when the light is just not enough for the faster shutter speeds.


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Brennan.M
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Dec 26, 2010 22:46 |  #2

Size and weight issues I would think


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Spaniard
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Dec 26, 2010 22:58 |  #3

Brennan.M wrote in post #11519647 (external link)
Size and weight issues I would think

and pricing.


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Cokeman
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Dec 26, 2010 22:59 |  #4

Brennan.M wrote in post #11519647 (external link)
Size and weight issues I would think

Possibly - but if people are willing to lug around the heavy 2.8 zooms (which presumably are heavy because of the 2.8 as well as the zooming), wouldn't they be willing to take a larger heavier prime (that doesn't need extra weight for zooming?)

I'm finding some situations with my 85/1.8 where the light requires shutter speeds slower than 1/50 and I'm getting shaky images then.

I know I can bump up the ISO or use a flash (or give up caffeine), but that's not my intention with this thread - I'm just curious about the prime+IS :)


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amfoto1
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Dec 26, 2010 23:00 |  #5

Brennan.M wrote in post #11519647 (external link)
Size and weight issues I would think

... and cost vs usefulness, especially with cameras offering higher and higher usable ISOs with each new generation.

Most of my lens kit is primes. Three have I.S. The only one that doesn't have I.S, that I occasionally wish did is the 135/2. The shorter lenses I really don't need it. Especially if it were to add size, weight, complexity and $400 to $600 to the price of the lens.

I think Canon might add it to the 135mm some day, and to the 200/2.8 and 400/5.6. The 180mm Macro will probably see it added sometime, too... But I'm not really sure if I'm sold on I.S. for macro yet or not. I'm still using a non-I.S. 100mm Macro and don't have any plans to change (it's on a tripod or monopod mostly, when shooting at higher magnifications). I just don't see the 85mm, 50mm, 35mm, etc. needing it at all.


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Ren ­ Tachino
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Dec 26, 2010 23:29 |  #6

just curious, does IS actually affect lens size that much? for instance, the 70-200 f/2.8 IS and non-IS versions are almost the same size. and the f/4 IS and non-IS version are the exact same size




  
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DC ­ Fan
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Dec 27, 2010 00:18 |  #7

Cokeman wrote in post #11519645 (external link)
Is there a good reason that there aren't more prime lenses with image stabilization?

Nine of the 25 image stabilization lenses sold by Canon are fixed focus lenses. That's not enough?




  
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thenextguy
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Dec 27, 2010 02:36 |  #8

Ren Tachino wrote in post #11519877 (external link)
just curious, does IS actually affect lens size that much? for instance, the 70-200 f/2.8 IS and non-IS versions are almost the same size. and the f/4 IS and non-IS version are the exact same size

Size isn't affected, but weight is. The amount depends on the size of the lens. Usually it's a few more ounces.


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Jericobot
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Dec 27, 2010 03:06 |  #9

DC Fan wrote in post #11520093 (external link)
Nine of the 25 image stabilization lenses sold by Canon are fixed focus lenses. That's not enough?

This. Tighten up your shooting stance, that's what I use for IS


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Cokeman
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Dec 27, 2010 09:59 |  #10

Jericobot wrote in post #11520536 (external link)
This. Tighten up your shooting stance, that's what I use for IS

I'm working towards this - my question was just out of curiosity while I'm getting there.


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picturecrazy
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Dec 27, 2010 11:43 |  #11

I'm assuming you mean short primes, and not the super telephotos.

One reason I personally think it isn't THAT necessary is because you don't need super high shutter speeds for short primes. For an 85mm you only need 1/80, etc... Pair that with the fact that the f-ratios are really big, you'd have to be in some SERIOUSLY low light to need it. For example, if you wanted IS to be able shoot 1/15 F/1.2 ISO6400... I mean c'mon... those are conditions cameras cannot even autofocus in. How practical would it be?

Cost is another issue. They can put cheap stabilizers in lenses like the 18-55 and 55-250 because the apertures are really narrow, so the stabilizer motors don't have to move much glass. Therefore they can build them cheaply. To build AF motors strong, robust, yet still fast enough to move the ridiculous amount of glass in a 50L or 85L? That would be very very expensive and add a lot of weight and size.


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robtaylor22
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Dec 27, 2010 11:52 |  #12

Primes don't sell anywhere near as well as Zooms so there is a volume issue. Also many of the primes people buy are not that long and don't really need IS. But probably the biggest factor is that many of Canon's primes were designed many years ago before IS was common. As Canon slowly replaces these low volume primes I would expect more of them to be IS lenses. A classic example of this in the 100mm Macro which is now an IS lens.




  
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ni$mo350
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Dec 27, 2010 12:50 |  #13

If/when they ever sell the 135L IS, I will be one of the first in line. I love the lens but miss the Is from my 70-200L. (especially after a cup of coffee)


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r.morales
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Dec 27, 2010 13:09 |  #14

1 . price
2 . weight
3 . not enought market


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ed ­ rader
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Dec 27, 2010 13:13 |  #15

Brennan.M wrote in post #11519647 (external link)
Size and weight issues I would think

i doubt those are issues at all. a redesigned lens with IS should not be any larger or heavier. price and demand are the issues.

ed rader


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