December 22, 2014, 12:56:39 AM

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Topics - JustMeOregon

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Hey Folks,

I recently became a Gold-Level member of "Canon Professional Services." Included with the membership is "Canon Maintenance Service (CMS)" for 5-pieces of DSLR cameras & EF Lenses. With springtime (hopefully) right around the corner, I was wondering if anybody knew exactly what "maintenance service" I should expect if I send them a camera &/or a lens? I assume that the camera CMS is fairly straight forward and would include a sensor cleaning at least, but what else should I expect? Might they reload the firmware or something that would cause all my AFMA settings & custom functions to revert to the factory defaults? And with a lens, what else would they do other than shaking-it to hear if anything is rattling around inside? Could I dare hope that they would actually disassemble the lens (for free) to clean the cobwebs out? And is there any real chance for a piece to come back in worse shape then when it was first sent?

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Do any of you guys use one of the small LED field monitors (typically used for video) as a compositional &/or focusing aid for still shots? I'm particularly interested in using one for extremely low-angle (close to the ground) shots while using my tilt-shift lenses as described in this article at Fred Miranda's website.

http://www.fredmiranda.com/smallhd/

Prices seem to have come down (and the selection increased) since that article was written, so I was thinking about the Flashpoint 7-inch 1280x800 LED Field Monitor for $400 at Adorama:

http://www.adorama.com/FPFVPRO1.html


I'm not getting any younger, so getting down low to ground-level isn't getting any easier for me. And either is getting back up…

Any thoughts, suggestions, or comments?

And sure, you guys with the flip-out Vari-angle on-camera LCD's can interject a smug remark or two…

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Technical Support / Image Stabilization during back-button-focus
« on: February 17, 2014, 07:45:28 PM »
While reading CR's new review of the Sigma 24-105mm lens, I saw something that gave me pause...

In the Sigma 24-105, their version of Image Stabilization (OS):
Quote
...OS is always activated on this lens, something that differs greatly from Canon lenses, which only activates IS when focusing and tracking.

That got me thinking of how Canon's way of activating IS (only when focusing & tracking) affects me while I'm using back-button-focus... In Canon lenses, does Image Stabilization stop once I release the back-button-focus? With back-button-focus, does the shutter button continue to have any roll in IS? How does this IS behavior fit-into a focus/recompose workflow? Do I really have to keep the back-button depressed until after I've recomposed & taken the shot(s) in order to keep IS active?

The fine-print in the User's Manuals of the Canon IS lenses states:

Quote
If you set the camera's Custom Function to change the assigned button to operate the AF, the Image Stabilizer will operate when you press the newly assigned AF button.

As I read this, with the buttons on my 5D3 reassigned for back-button-focus (the shutter button set for "Metering Start" and the AF-ON button set for "Metering and AF start"), IS is activated when I press the newly assigned AF-ON button; okay, I get that. But this statement does not necessarily mean that IS immediately stops when the back-button-focus is released, or that IS is deactivated in the shutter button when reassigned to a back-button. So I'm left wondering what is the correct way to use the focus/recompose technique while still keeping the IS active during the shot. Is there a delay in the IS turning off after being activated by a back-button-focus? A lot if "internet people" claim that this is the case... Does the (half pressed) shutter button still retain its IS function when AF is reassigned to a back button? Or is the only correct way to focus/recompose with back-button-focus is to keep it depressed all the time while shooting?

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