01 October 2017

What is Camera / Lens EXIF Data?

What is Camera / Lens EXIF Data?
From Canon's EOS Utility Software
EXIF = Exchangeable Image File Format Information (EXIF Data)

EXIF Data is the identification and listing of information metadata tags and its values -available for DSLR / Compact / Smartphone cameras before and / or after taking the photo. 

Generally found on your LCD screen viewing image detail or when downloaded in Canon's Digital Photo Professional / Adobe Lightroom (and other camera / editing software).

Basic camera and lens detail such as Camera Make / Model, Lens Type, Exposure, White Balance, File format and various other settings are included in the EXIF Data.

Before / after the shot
The image on the right is a Windows 7 screenshot from a Canon EOS 700D DSLR attached to the EOS Utility (via USB) - before a shot. The Canon camera was set to Av mode with a pre-set f/stop value of F4.5, ISO 200, AF (Auto-Focus), RAW, and Single Shot. The absence of the shutter speed is indicative that when in Av mode, the camera will select the shutter speed during the actual exposure - and will only be available as EXIF Data after the shot.

The bottom image is the EXIF data displayed after the shot settings (extracted from the Canon Digital Photo Professional post-processing software). Notice that the Shutter Speed is now included = (1/45) - The lens information - Canon EF-S 18-135mm IS STM is now also displayed (together with other useful information).

Adobe Lightroom Free Plugin to view Body / Lens EXIF Data
Adobe Lightroom Free Plugin to view Body / Lens EXIF Data

Exposure / EXIF Data
Exposure EXIF information is the result of the Exposure / Lens settings set by the photographer ie. in Manual / Aperture Priority / Shutter Priority / Program Mode the photographer controls exposure settings such as Aperture / ISO / Shutter Speed.

What about EXIF Data in Auto Mode? Although the camera carries out all exposure decisions (except for lens focal length / zoom), all EXIF data will still be recorded and be available after the shot.

Basic camera and exposure info:- Camera / lens type ie. Photo taken with the Canon PowerShot SX60 HS at a focal length of 200mm.
  • Aperture - measuring the size of incoming light areas (f/stop) ie. f/5.6
  • ISO - light or image sensor sensitivity standard) ie ISO 100
  • Shutter speed - (measured in seconds) ie. 3 seconds or 1/1000's

Example of EXIF Data
: Canon PowerShot SX60 HS

  • Focal Length (FL) 200mm
  • f/5.6 (Aperture)
  • ISO 200 (ISO)
  • 1/250s (Shutter speed)

EXIF Data as displayed in the Canon's Digital Photo Professional Post-Processing Software:


Canon EOS 7D Mark II RAW EXIF DATA (After the Exposure / Capture)

EXIF Data as displayed in the Canon's Digital Photo Professional Post-Processing Software (Canon EOS 7D Mark II):
Canon Digital Photo Professional Post-Processing Software Snapshot

More on The Exposure Triangle (Aperture / ISO / Shutter Speed) - Exposure Triangle