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    private's Avatar
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    Default 24-70 2.8 L lens

    Is there a sweet spot when it comes to aperture on this lens? I know for zoom, its around 40-45mm
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    According to this, it;s actually best "overall" at the wide end (24-30mm)
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    Looks like F8-11 is the sweet spot for just about any focal length from those charts.

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    I was hoping that was not the case...oh well. Does Canon make a zoom lens that is always sharp?
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    The 70-200 f/4L is considered by many to be the sharpest lens in the L series lineup and I can say that I don't disagree. It is tack sharp throughout the entire focal length with no exceptions that I can see. That is if you do get a good copy I know quality control has been in flux throughout the years...
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    I have been hearing the same exact thing. re the quality. I would only use the 70-200 outside, so I think I would be OK with F/4 - and I have also heard that the quality is not as great - been hearing whispers about the 50D as well, with noise issues. Have you had that problem...
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    Quote Originally Posted by private View Post
    Is there a sweet spot when it comes to aperture on this lens? I know for zoom, its around 40-45mm
    A friend of mine has a copy of "The Brick" and he's really not happy with the image quality he's getting from it. Says it's the softest L lens he has.
    Quote Originally Posted by private View Post
    been hearing whispers about the 50D as well, with noise issues.
    The noise issue thing with the 50D started as soon as it was introduced. But I think it's high ISO noise issues (that almost every other camera will have problems with). If you keep the ISO down to normal levels the noise problem is almost non-existent.

    You have the 50D...aren't you happy with it? Big step up from a XTi.
    Last edited by Samanax; 09-23-2009 at 03:59 AM.

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    Digital Picture 24-70 Review

    Hope that helps. I'm kind of dissappointed to hear that you guys are having problems with soft L lenses. Being a minigearhead I kind of had my list of wants planned out. And next was either the 24-70 or more likely the 70-200 2.8. =(
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    private's Avatar
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    my 24-70 could be sharper IMO. The 50D gets noisey in the shadows at ISO 400, it might just be my exposure settings tho...

    but if the light is really good, I hardly get any noise. I am gonna have the camera look at in JAn after the busy season...and same with the lens. But I will say that my nift fifty is pretty dang sharp, and it fell down a mountin and I had to "pop"it back in place so it would focus...so I am sure my 24-70 needs some owrk also...
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    Quote Originally Posted by private View Post
    But I will say that my nift fifty is pretty dang sharp, and it fell down a mountin and I had to "pop"it back in place so it would focus...so I am sure my 24-70 needs some owrk also...
    A prime lens will generally be sharper than a zoom lens because it has lens elements for the light to pass through before it gets to the sensor.

    The 50D has micro adjustment...have you tested to see if the 24-70 is front or back focusing?

    Camera AF Microadjustment

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