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Old Feb 16, 2014, 9:41 AM   #1
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Default February 15, 2014: Fence Jumper

Fence Jumper

"This picture was taken as he ran across the road in front of us. Taken at ISO-1600 f/13"

Photographed by Wanette Davis from United States

Camera: Canon EOS 30D

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Old Feb 16, 2014, 4:08 PM   #2
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Why would he use f/13 for a shot like this? It makes no sense...and that sensor needs some cleaning.
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Old Feb 17, 2014, 2:30 PM   #3
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Originally Posted by Marawder View Post
Why would he...
The photographer is probably a "she", not a "he" (as Wanette is usually a name given to females). ;-)

From what I can see of the EXIF data, this photo was taken at a focal length of 300mm using an EOS 30D. I don't see a lens ID in the EXIF data (probably stripped out during the downsizing by Elements 6 (the editor used for downsizing according to the EXIF), as some image editors (including Photoshop products) tend to remove some of the Maker Notes information from the Metadata embedded by the camera.

But, most zoom lenses reaching out to 300mm have a widest aperture of around 5.6 or 6.3. Since most lenses are sharpest when set to around 2 or 3 stops down from wide open, f/13 (3 stops down from f/5.6) is probably a reasonable aperture for a typical zoom lens like that with a camera like the 8MP Canon 30D (IOW, set to about 3 stops down from the widest aperture available, keeping in mind that the photosite size you'd have with an 8MP sensor like the EOS 30D has is less prone to diffraction issues compared to some of the higher resolution APS-C size sensors).

This is not exactly the type of photo you'd suspect to be "planned" either.

There is no telling what was being shot prior to the deer running across the road, and because of the very shallow Depth of Field you'd have at 300mm with most lenses, f/13 is a reasonable aperture for 300mm, depending on the subject type and distance. It's probably pure luck that the ISO speed was set high enough to freeze most of the motion (as I see a 1/600 second shutter speed); and my guess would be that settings like that were being used for even lower lighting earlier in the morning (as that photo was taken just after 8:00AM).

I suspect that she did not have time to adjust any settings when the deer appeared either, and yet she was still able to grab that shot using what the camera was already set to for previous photos being taken earlier that morning.

In other words, that kind of photo would have required very quick reflexes, with no time to make any camera adjustments.

As for the dust spots, yes, that happens when you're stopped down to around f/13 (where any dust specs are going to be more visible at narrower aperture settings with a brighter sky in the background). So, it wouldn't hurt to clean the sensor.

But, technical details are not everything, and someone that was able to capture a rare photo of a deer moving like that is to be commended.
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Old Feb 17, 2014, 3:04 PM   #4
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IOW, sure, perhaps something like f/8 and ISO 400 (probably using an aperture of 1 stop down from wide open); or f/11 and ISO 800 (probably 2 stops down from wide open) might (and I stress "might") have been better than f/13 (most likely 3 stops down from wide open) and ISO 1600 at 300mm (depending on the characteristics of the lens being used), all which would have given you the same 1/600 second shutter speed in the same lighting.

Without the lens ID in the EXIF and more detailed analysis of the lens performance at various aperture settings, it's hard to say which aperture might have been sharper for that photo. However, as a general rule of thumb, 3 stops down from wide open is usually a good choice with that type of camera shooting with a consumer zoom lens at 300mm, giving acceptable sharpness with better depth of field

But, given the circumstances (a deer running across the road from where you're shooting, obviously at a very fast speed), there would have been no time to adjust camera settings from what was previously being used earlier that morning for other photos, and to capture that kind of photo would have required very quick reflexes.

That's not the kind of subject you see every day (a rapidly moving deer like that early in the morning is a very rare sight). ;-)
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