SX50 w/ Canon 500D attached...

Started Oct 21, 2012 | Discussions thread
Steen Bay
Veteran MemberPosts: 6,188
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Re: SX50 w/ Canon 500D attached...
In reply to Rich Calsada, Oct 24, 2012

Rich Calsada wrote:

Steen Bay wrote:

Condor wrote:

About the Lock feature, maybe it is so new (well, in fact it is) that people do not really know or understand that at 1200mm they are almost obliged to use it... as they were obliged to acitivate IS with the previous superzoom units.  And it is as simple to use as IS, or maybe simpler, since it has a specific button for it. Another forum member (Rich) already showed the difference between no-Locked and Locked distant shots and his result is below... that's why I considered important to alert you to use it in your independent and objective comparative shots against FZ200 + Nikon TC ... as I said, that was all...

no-Locked to the left, Locked to the right

Would be nice if it did, but I don't find it likely that pressing the 'lock' button should improve the already excellent IS. The feature is called 'Framing assist - lock', and think that's all it does, gives a more steady EVF/LCD image when framing.

I'll have to disagree, in the above images the lettering is framed (centered) pretty much the same, but the locked image is much clearer. My main disagreement however is if it was just framing in EVF/LCD and the above is what I was seeing in lcd/evf the resulting image should be the same.

Back when I joined DPreview in 2007. The liveview feature on  DSLR's were just coming out, while those with point and shoot cams already had the wysiwyg feature. That is exactly what the resulting image is here not just and aid for viewing before the actual shot.

Here's two more images first without lock and Virgil is pretty much where I wanted him framed, but a blur, and second is with lock, although I had lock on Virgil he drifted slowly to left but image focus remained sharp. Kind of what I would expect from a more robust IS in affect.

not locked

locked

To try and simulate what your looking at without lock vs with lock I uploaded a video and included helicopter and Virgil images in addition to video.

http://www.flickr.com/photos/52977519@N00/sets/72157631845654889/

Also I would think that with the use of an add on optical TC like the Nikon, all bets are off, for any effective IS if you were trying to handhold. My experience with Japanese build tolerances for electronics was that they were really tightly matched to task at hand and any additional "stress" would cause a not very good outcome.

Hope that you're right, that the SX50 really has an improved IS, but I find it kind of hard to believe that it's possible to achieve much better stabilization than the 4+ stops the SX40 already has, and if it was, why should it then be necessary to press the 'lock' button to get the improved stabilization? Why doesn't it work automatically when IS is enabled in the menu?

Your 'lock' vs. 'no-lock' images look convincing, but the sharpness can vary wildly from shot to shot when using long FLs and slow shutter speeds, and I still find it most likely that it's a coincidence that the 'lock' images are sharpest.

How does the 'lock' function work then? Don't know, but a guess could be that it's a software thing that works by cropping the LCD/EVF image a bit (compared to the image on the sensor), in order to make more 'room' for correction. Maybe something similar to how 'Powered IS' works when shooting video with the SX40?

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