EF 28-135 f/4L IS? [CR1]

Status
Not open for further replies.

Canon Rumors Guy

Canon EOS 40D
CR Pro
  • Jul 20, 2010
    9,723
    2,395
    Canada
    www.canonrumors.com
    HTML:
    <p><strong>From Photo.net
    
    <span style="font-weight: normal;">Apparently Canon is testing a new 28-135 Lens. This is a direct quote I received via email.</span></strong></p>
    <blockquote><p>Canon is currently performing research, prototyping & testing new 28-135mm F4 L IS; less wide angle and more telephoto. Engineering says it would require 2 extra LD glass elements; shifting price to an additional $800 CAD of the original 28-135mm MSRP.  such a lens would cost and estimated $1549 MSRP. It is also Canons next generation Image Stabilization will be released;  called “IS2″, where the two additional long magnets are present, where larger float distance of separation between groups; yielding up to now 5 stops of effective stabilization; both in longitudinal and lateral vibrations will be dampened.  IS2 will consume approximately 20% battery power.</p></blockquote>
    <ul>
    <li>Mount: EF</li>
    <li>Focal length 28 – 135 mm IS2 II</li>
    <li>Maximum aperture  F4.0 w/ IS</li>
    <li>Minimum aperture  F22</li>
    <li>Lens construction 21 elements in 14 groups</li>
    <li>Diaphragm blades  8</li>
    <li>Image stabilizer  4-stops tested</li>
    <li>AF actuator  Ring USM (full-time manual focus built-in)</li>
    <li>Filter diameter 82 mm</li>
    <li>Dimensions (dia x len)  88.5 x 112 mm</li>
    <li>Weight 730g EST.</li>
    </ul>
    <p><strong>Source: </strong><a href="http://photo.net/equipment/canon/24-105/"><strong>http://photo.net/equipment/canon/24-105/</strong></a></p>
    <p><em>thanks kwannon</em></p>
    <p><strong><span style="color: #ff0000;">c</span>r</strong></p>
     

    neuroanatomist

    I post too Much on Here!!
    CR Pro
    Jul 21, 2010
    27,883
    7,949
    Agreed - I don't get the 82mm filter size. Also, what the heck is, "both in longitudinal and lateral vibrations will be dampened." IS damps angular vibrations. Lateral vibrations are currently damped only by the new Hybrid IS. Longitudinal vibrations would mean forward-back motion of the camera; AI Servo AF helps correct for that, but for IS to perform a similar correction it would actually have to move the focusing groups - something that seems unlikely. And why does the rumor state that this new 'IS2' provides 5 stops of stabilization, then list the specs as, "Image stabilizer 4-stops tested"? Finally, given that the vast majority of Canon bodies sold are 1.6x crop, I don't see them taking anything from the wide end of a walkaround zoom.

    I declare shenanigans. ::)

    Of course, the original post on photo.net beat me to the declaration - look at the last line, "**all of the above statements are mearly merely speculation and rumors."
     
    Upvote 0

    kubelik

    EOS R
    Aug 11, 2010
    824
    0
    neuroanatomist said:
    I declare shenanigans. ::)

    but we love shenanigans! don't we? no, maybe not.

    I'm also going to go with a no on this one. too close to being an ugly sister to the 24-105 f/4 L IS ... those extra 4 mm on the wide end matter a heck of a lot more than the 30 mm on the long end, whether its for walkaround photography or nature photography (which to my knowledge are the primary purpose of this type of lens).
     
    Upvote 0

    kubelik

    EOS R
    Aug 11, 2010
    824
    0
    dilbert said:
    I can't help but wonder if the engineering behind this is more of a result of comparing the 24-105 to Nikon's 24-120 than an analysis of what people want. The kind of thing that someone would make up...

    I think we're all thinking that it's made up. beyond that, even if I were to make up a fantasy lens, it wouldn't be this one.
     
    Upvote 0

    neuroanatomist

    I post too Much on Here!!
    CR Pro
    Jul 21, 2010
    27,883
    7,949
    dilbert said:
    Aren't some of these other methods of stabilization meant to kick in when you're using the lens vertically for macro shooting?

    Not that I know of. The standard IS has a gyroscopic sensor that detects angular motion around two axes (pitch and yaw, in flight terns). Hybrid IS includes the angular sensor, and adds an accelerometer that detects translational motion (XY axes in the plane of the sensor). Whatever IS system a lens has (or camera, since the newest PowerShots also include Hybrid IS), all the sensors and compensations are operating whenever the IS system is active.
     
    Upvote 0
    Status
    Not open for further replies.