40D @ 1250 ISO

shot this squirrel late this afternoon waiting for some deer to emerge from the woods. This was done using the 70-200 2.8

• File size: 139138 bytes
  
• File date: 2007:10:06 22:02:51
  
• Camera make: Canon
  
• Camera model: Canon EOS 40D
  
• Date/Time: 2007:10:06 18:25:59
  
• Resolution: 800 x 469
  
• Flash used: No
  
• Focal length: 200.0mm (35mm equivalent: 555mm)
  
• CCD width: 12.97mm
  
• Exposure time: 0.050 s (1/20)
  
• Aperture: f/2.8
  
• ISO equiv.: 1250
  
• Whitebalance: Auto
  
• Metering Mode: matrix
  
• Exposure: aperture priority (semi-auto)

Nice!
Too bad that squirrel is slightly out of focus..

Nice, but I don't understand. "Focal length: 200.0mm (35mm equivalent: 555mm) "

200x1.6=320mm

I hate back-focusing...almost as much as I hate front-focusing!

Tony

Tony Long Photos on PBase

tonylong wrote in post #4079613
I hate back-focusing...almost as much as I hate front-focusing!

James, ignore this pointless comment...

I think the slight blur wasn't a focus issue as it was probably more of slight camera shake at 1/20 and pressing the shutter myself.

ACDCROCKS wrote in post #4079605
Nice, but I don't understand. "Focal length: 200.0mm (35mm equivalent: 555mm) "

200x1.6=320mm

Photobucket does that when it displays the EXIF. It's retarded. Ignore it. I think the programmers assumed everyone is using a P&S and just plugged in a common P&S sensor size.

Just wondering. Does a shot like that outside need 1250 ISO?

jtown wrote in post #4085409
Just wondering. Does a shot like that outside need 1250 ISO?

Apparently so, since OP was at f/2.8 and getting 1/20th shutter speed. I would have gone to ISO1600.

considering hes already at F2.8 (widest aperture) and has taken this shot at 1/20th second... then yep... it was obviously quite low light at the time and im amazed that the shot was able to be taken - well done to the op... especially at 200mm!

So already at f2.8, needing max shutter speed... which at iso1250 = 1/20 then the only other thing to do would be flash or even higher ISO like iso1600 to try for 1/30th sec.

Was in a forest late afternood... in shadows? under a tree? quite dark in a situation like that... had I had my 100-400 no chance of the shot

So the answer is yes... it needed to be 1250

Gliderparentntn wrote in post #4078784
shot this squirrel late this afternoon waiting for some deer to emerge from the woods. This was done using the 70-200 2.8

the only question i have is why was the squirrel waiting for some deer to emerge from the woods...ambush ?

ed rader

hahaa he does look mighty hungry and with his tail raised in the attack position too

Super-Nicko wrote in post #4085509
considering hes already at F2.8 (widest aperture) and has taken this shot at 1/20th second... then yep... it was obviously quite low light at the time and im amazed that the shot was able to be taken - well done to the op... especially at 200mm!

So already at f2.8, needing max shutter speed... which at iso1250 = 1/20 then the only other thing to do would be flash or even higher ISO like iso1600 to try for 1/30th sec.

Was in a forest late afternood... in shadows? under a tree? quite dark in a situation like that... had I had my 100-400 no chance of the shot

So the answer is yes... it needed to be 1250

I figured this was so because of the reasons you listed but just wanted to check. Thanks!

Gliderparentntn wrote in post #4078784
shot this squirrel late this afternoon waiting for some deer to emerge from the woods. This was done using the 70-200 2.8

here's the Exif:

• File size: 139138 bytes
  
• File date: 2007:10:06 22:02:51
  
• Camera make: Canon
  
• Camera model: Canon EOS 40D
  
• Date/Time: 2007:10:06 18:25:59
  
• Resolution: 800 x 469
  
• Flash used: No
  
• Focal length: 200.0mm (35mm equivalent: 555mm)
  
• CCD width: 12.97mm
  
• Exposure time: 0.050 s (1/20)
  
• Aperture: f/2.8
  
• ISO equiv.: 1250
  
• Whitebalance: Auto
  
• Metering Mode: matrix
  
• Exposure: aperture priority (semi-auto)

Exif looks all wrong. Unless you cropped the image, it should be 800x533, 35mm "eqiv" (should be field of view not equiv.) should be 360mm, sensor width should be about 18mm.

And it looks like you needed iso3200. 1/20 shutter speed at 200mm is far too slow a speed. Plus your image is horribly front focused.

RedHot wrote in post #4086948
Exif looks all wrong. Unless you cropped the image, it should be 800x533, 35mm "eqiv" (should be field of view not equiv.) should be 360mm, sensor width should be about 18mm.

It's cropped. Right click on it and see for yourself. FOV equivalent is actually 320mm, not 360. The width of the CMOS sensor is 22.2mm. Like I said before, Photobucket doesn't read EXIF correctly.