Aperture F45.00???

canoesailor

Below is all the info from a Picture I took recently, you'll notice that the Aperture Value is given as 45.0. and the lens is a Canon ef70-300mm (at 300mm) on a 50d body.

Does anyone have any idea how this AV was acheived, in theory the lens doesn't support such a small setting

File Name _MG_0908.CR2
Camera Model Canon EOS 50D
Firmware Firmware Version 1.0.7
Shooting Date/Time 26/12/2009 12:29:52
Owner's Name
Shooting Mode Shutter-Priority AE
Tv( Shutter Speed ) 1/8
Av( Aperture Value ) 45.0
Metering Mode Center-Weighted Average Metering
Exposure Compensation 0
ISO Speed 800
Auto ISO Speed OFF
Lens EF70-300mm f/4-5.6 IS USM
Focal Length 300.0 mm
Image Size 4752x3168
Image Quality RAW
Flash Off
FE lock OFF
White Balance Mode Auto
AF Mode One-Shot AF
Picture Style Standard
Sharpness 3
Contrast 0
Saturation 0
Color tone 0
Color Space Adobe RGB
Long exposure noise reduction 0:Off
High ISO speed noise reduction 0:Standard
Highlight tone priority 0:Disable
Auto Lighting Optimizer 3:Disable
Peripheral illumination correction Enable
File Size 21147 KB
Dust Delete Data No
Drive Mode Low-speed continuous shooting
Live View Shooting OFF

Thanks

JohnT

ziggy53

Minimum aperture for the Canon EF 70-300mm, f4-5.6 IS USM is indeed f32-f45.

http://www.canon.co.uk/For_Home/Product_Finder/Cameras/EF_Lenses/Image_Stabilization_Lenses/EF_70-300mm_f4-5.6_IS_USM/index.asp?specs=1

canoesailor

Doh!!

ziggy53 wrote:

Minimum aperture for the Canon EF 70-300mm, f4-5.6 IS USM is indeed f32-f45.

http://www.canon.co.uk/For_Home/Product_Finder/Cameras/EF_Lenses/Image_Stabilization_Lenses/EF_70-300mm_f4-5.6_IS_USM/index.asp?specs=1

Thanks Ziggy - I should have looked there first but I was convinced it was F32. I've never seen an aperture setting that low before, I dont usually use Tv - I caught the knob as I took it out the case and in the field I usually take a quick shot (to make sure I've got something) before I worry about fine tuning the settings. When I started to look at the settings it was obvious I was in Tv and I changed it back to Av.