Re: EF 24-70 f/4L IS & EF 35 f/2 IS
Aputure said:
Short focal lengths? What about 50mm to 70mm? I don't think that's short at all. It'll especially be useful on the long end. And the IS will also be useful with the "slow" f/4 aperture. Even if you're getting a shutter speed of 1/10 at the 24mm wide end, wouldn't it be nice to have IS then? The IS will also certainly help the macro shooting. So it serves a great purpose on this lens, I think.
The choice between this and the f/2.8 should be clear = pro wedding shooters who need the speed and bokeh will go for the 2.8, hobbyists and video shooters will go for the f/4.
A few more thoughts on this lens:
http://www.aputure.com/blog/?p=4228
amazin said:
Correct me if i'm wrong but what's the point of IS in such short focal lengths?
With the release of 24-70 f/4L IS it will be a tough choice for some to decide with the 2.8 non IS version, what do you think?
@Aputure (nice blog, btw) -- there has been a healthy 50-75% of us on this forum that IS is not needed on wide glass, and that speed should always trump IS w.r.t. Canon's spec decisions. I cannot discern if this is due to...
- Classical thinking -- the old rule of thumb that you need 1/[focal length] for shutter speed, and therefore, wide glass needs IS less than long glass.
- Value thinking -- why should we pony up extra for IS when it's not truly a must, I got by without it for years, etc.
- In the 'I hope the new announcement is the lens I want' / 'Canon only makes so many lenses' department, it could be sour grapes, frustration, incredulity etc. that Canon chose IS instead of a fast aperture -- see all threads re: these recent lens announcements
- A stigma that IS is for beginners, soccer moms, etc. and not for enthusiasts or pros.
...but it's probably a combination of the above.
I personally believe that IS helps at
all focal lengths as I am frequently shooting at toxically high ISO without a flash or a tripod. So IS effectively buys me stops, plain and simple.
Now, this is predicated on the thought that the slower glass + IS buys me a
virtually faster lens than the current fastest glass (again, I'm rarely shooting moving objects in very low light). This is due to some simple math of:
[# stops of IS] - [# stops slower than the fastest lens in this length] yielding a positive number.
So if, somehow, the proposed new lens had a watered down 2 stop IS or if the aperture was much slower than the fastest alternative, then that IS lens would be less attractive than its fast non-IS alternative.
Keep in mind that IS is improving
far more quickly than camera companies have been offering faster glass. Consider that Canon had a constant F/2.8 standard zoom in 1993 and nothing faster has ever been developed. (Some of this is cost and weight, but still, they aren't exactly rushing an F/2 standard zoom out, much to the chagrin of this forum community.)
One wonders if in 10 years, the majority of camera glass will be unbelieveably small/light F/4, F/5.6 glass with 7-8 stops of IS. I know that's heresy for this forum -- who constantly push their gear to get the most out of their shots -- but it's a possibility, right?
- A