Tag Archives: jpeg

File Formats: RAW v JPEG

RAW & JPEG are two different types of electronic file

The principal differences between the two types are:

  • RAW files are literally the raw data as produced by the camera at the moment of pressing the shutter
  • They have no ‘built in’ file format
  • You are then free to adjust this data through Photoshop or a similar application on a computer
  • You can change; exposure, white balance, contrast, brightness, etc
  • You can return all settings to the start point and begin again
  • A RAW file is, in effect, a digital negative

 

  • JPEG’s are generated by the camera after exposure & are written onto the memory card
  • Preset data for exposure, white balance, etc will be embedded in the file & can never be removed
  • The parameters are decided by you in advance
  • Your latitude to change & make alterations afterwards are very limited
  • The file will be compressed & this is achieved by discarding information that can never be retrieved

 

If you are working digitally then having a camera that will allow you to shoot in RAW format as well as JPEG can be an advantage.
However a JPEG that is produced by the camera at the same time as a RAW is not as satisfactory as one that you generate yourself from the RAW file during post-production.
Many DSLR’s will do both RAW & JPEG at the same time but this will reduce storage capacity.

 

Why shoot RAW?

  • When creating digital prints of the highest exhibition quality & size
  • Shooting high ISO values in low light
  • When you want to make high quality monochrome conversions
  • Photographing a subject with a high dynamic range
  • When you are uncertain about the colour temperature of the subject

 

Why shoot JPEG?

  • When the end result is for small scale or low quality output
  • If you need fast workflow
  • When you need low res images for web or onscreen use
  • When you need to shoot quickly
  • When the end result requires minimal post-production

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