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 p.2 #20 · Canon 300mm f/4L IS II patent released | |
Monito wrote:
far148 wrote: Why does every lense need IS? Why can we learn to shoot properly without it? 
1. Because not everybody makes the mistake of thinking that everybody else shoots the same subject matter the same way as they do.
2. Because not everybody shoots in sunlight or cloudy bright conditions.
3. Because not everybody shoots by panning simple targets.
4. Because not everybody shoots at f/4 or f/5.6. Sometimes they use f/16 or f/22.
5. Because not everybody is as fabulously skilled as you. Or as perfectly healthy as you.
And its not every lens (note spelling).
far148 wrote: It sounds like you guys need to learn how to shoot without crutches.
It sounds like you need to get out of your comfort zone and attempt some other subject matter and in other conditions requiring the tools that many skilled photographers use. Many experienced photographers who know "how to shoot without crutches" use IS when appropriate for great results not obtainable any other way.
Besides all of the above, there are advantages to IS even with high shutter speeds.
First, regardless of how steady some may think that they are, there is always camera shake and camera shake always degrades image quality. Thus, the question is not whether there is camera shake. Instead, the question is, at what level does that camera shake have noticeable impact on image quality? I find that, even with high shutter speeds, when examined closely, there can be a difference in sharpness between images taken with IS and without IS. In many situations, those differences are irrelevant, however, when one wishes to print large or when severe cropping is a necessity, those differences can become relevant.
Further, when shooting many subjects, especially ones that are moving quickly such as birds in flight, part of the challenge is getting the focus point on the subject, locking in focus, and keeping the focus point on the subject. Even if IS was not otherwise necessary, with IS steadying the image in the viewfinder, acquiring initial focus and maintaining focus can be much easier than it would be without IS and with the image jumping around in the viewfinder. Without IS and with the image jumping around in the viewfinder, the benefits of a fast focusing lens can be completely lost with the extra time it takes to acquire focus.
I find that most/many on internet forums who deny the benefits of IS are those who made the choice of buying a non-IS version of a lens and who have some apparent need to justify that their purchase decision was the correct one.
Les
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