canon DPP

[RLipp69]

i just started to use canons DPP program for raw that came with the camera.I want to trim some pictures and i see aspect ratios (1.1)(3.2)(2.3)(4.3)(3.4)(5.4)(4.5).I can some1 explain these ratios for me .Witch one of these is 4x6 or 8x10.Thanks

[davidcrebelxt]

ratios are always expressed as the lowest common denominator... this way we can express a single crop ratio as different ACTUAL image sizes:

ie ratio is 2:3.... multiply both by two and you get 4x6
multiply both by four and you get 8x12

4:5.... multiply both by two and you get 8x10
multiply both by four and you get 16x20

Sorry if I'm not making this any clearer... math actually isn't my strong subject.

[Damo77]

It's simple mathematics - picture sizes are multiples of the ratios. So 2:3 ratio could be a 4x6 print, or a 6x9 print, or an 8x12 print, etc.

Edit: David got in first, and explained it much better than me!

Don't be too hasty trimming your photos - it's much better to keep every single pixel until the end, when you actually come to print. Otherwise you'll shoot yourself in the foot by preparing an 8x10 file, then deciding you want an 8x12 instead, and you've chopped some pixels off.

[tzalman]

Don't be too hasty trimming your photos - it's much better to keep every single pixel until the end, when you actually come to print. Otherwise you'll shoot yourself in the foot by preparing an 8x10 file, then deciding you want an 8x12 instead, and you've chopped some pixels off.
Good advise. However,....with DPP the trim is merely a notation in the metadata and is done at conversion. So as long as you don't delete the RAW (Iron Rule no. 1), you can always go back to it and cancel the trim.

[bildeb0rg]

If there's any confusion, and you just want a particular print size, hit "custom" then type in the size in the resize boxes.