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Thread: What res to crop?

  1. #1

    Default What res to crop?

    I want to crop a 5 megapixels picture for developing..... so am I suppose to crop to 2560 X 1707 or some other res?

  2. #2

  3. #3

    Default

    need to know the following before we can help:

    What size are u printing to (4R, 5R etc)?

    What is your original image size?

  4. #4

    Default

    original size is 2560 X 1920

    what size to print..... 3R,4R, 5R & 8R......

    does what size to print actually matters? I thought all of them are of the same ratio 3:2?

  5. #5

    Default

    Originally posted by Glyyde
    original size is 2560 X 1920

    what size to print..... 3R,4R, 5R & 8R......

    does what size to print actually matters? I thought all of them are of the same ratio 3:2?
    No they are at different aspect ratios.

    In any case, you just need to crop to the correct aspect ratio. It doesn't matter wat the actual size is.

  6. #6

    Default

    Not sure what 3R is...anyway in my knowledge most labs don't print 3R for digital prints.

    but.
    4R is 4x6 thus 2:3 ratio
    5R is 5x7 thus 5:7 ratio
    8R is 8x10 thus 4:5 ratio
    Super 8R is 8x12 thus 2:3 ratio

    By simple calculations, to maximise the pixel count of your original image, you should crop to:

    4R: 2560 x 1706
    5R: 2560 x 1828
    8R: 2400 x 1920
    S8R: 2560 x 1706

    Having said that, I should also say that you don't need such high resolutions esp for the smaller prints like 4R and 5R. For those, 16kk x 10kk kind of resolution is more than sufficient.

    And you can choose not to crop your images at all if you can trust the lab to do a good job for you. Some labs crop quite well, like how I'd crop it myself. Saves you the trouble if u have a big bunch of photos to crop.

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