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  1. #1
    Frequent Member delboysafa's Avatar
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    Default Brain Freeze :-) Resizing images in Lightroom

    All,

    I will honestly admit that I have had a bit of a brain freeze. I have Lightroom. Using a Nikon D810 predominantly. What do you export the image at for high resolution to print to its biggest size as a JPEG. I normally save it at the resolution size i.e. 7360 x 4912 at 300 dpi but the file sizes are only a couple of mb. I know I have gone wrong somewhere and just trying to figure it out. Appreciate any help

    Thanks
    Delboysafa

    'Always be improving'


  2. #2
    Administrator SimonDP's Avatar
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    Default Re: Brain Freeze :-) Resizing images in Lightroom

    For HQ printing I will export at 100% full size always. Otherwise I will resize to 1800x1200 for Jumbo, 2400x3600 A4 or whatever print size I require all @ 300dpi. The bigger file size contains more data, for accurate colour and detail.
    Simon Du Plessis

    www.actionimage.co.za simondp@actionimage.co.za

    (I'll keep on shooting, and one of these days I'll get it right!)
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  3. #3
    Premium Member elsahoffmann's Avatar
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    Default Re: Brain Freeze :-) Resizing images in Lightroom

    Simon - something strange though which I have no explanation for -
    Derek sent me a photo - transferred the file to me thru Skype - and it is 4.6MB (I checked where I downloaded the file to - clearly says 4.6.
    I then opened the file in Photoshop, and saved it again without touching it - in another place - now it's 15.1MB.
    Explanation? any compressing somewhere?
    I dont use LR so I cant check any settings
    Nudity is the most Avant Garde form of dress

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  4. #4
    Administrator SimonDP's Avatar
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    Default Re: Brain Freeze :-) Resizing images in Lightroom

    I have noticed that PS saves a bigger file, I just rechecked and opened a 6.8 MB Canon 80D file in CS2, changed the file name only when "saved as" and now it 8,4 MB. Don't know why PS does this. I'v also noticed similar changes when Exporting the same file, full size, from raw to jpg from LR and Canon's DPP, LR saving the larger file size.
    Simon Du Plessis

    www.actionimage.co.za simondp@actionimage.co.za

    (I'll keep on shooting, and one of these days I'll get it right!)
    Contact me for training in Beginners, Macro, Wildlife or Sport & Action photography
    Please e-mail or PM me should you wish to have my comments on a specific image, or to comment/ask questions on my crits)

  5. #5
    Premium Member elsahoffmann's Avatar
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    Default Re: Brain Freeze :-) Resizing images in Lightroom

    Very deceiving this
    I am picking the brains of some other guys and will report back if I have an answer or explanation
    Nudity is the most Avant Garde form of dress

    www.elsahoffmann.co.za
    www.intimateimages.co.za

  6. #6
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    Default Re: Brain Freeze :-) Resizing images in Lightroom

    Quote Originally Posted by elsahoffmann View Post
    Simon - something strange though which I have no explanation for -
    Derek sent me a photo - transferred the file to me thru Skype - and it is 4.6MB (I checked where I downloaded the file to - clearly says 4.6.
    I then opened the file in Photoshop, and saved it again without touching it - in another place - now it's 15.1MB.
    Explanation? any compressing somewhere?
    I dont use LR so I cant check any settings
    When you open a file in PS you see the file after it's been uncompressed (the actual file size is displayed on the bottom left corner) then when you save it again you're compressing it again, this time using PS's compression.

  7. #7
    Premium Member elsahoffmann's Avatar
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    Default Re: Brain Freeze :-) Resizing images in Lightroom

    Via a another friend:
    Sounds like one set of specifications is for the nominal, uncompressed, file size. The typical 'jpg fine' setting tends to give 1/4 actual file size.

    A file read into Photoshop will report the same pixel dimension whether it started its existence as a highly compressed or non-compressed file, but the sizes of the corresponding disk files can vary greatly.

    Nudity is the most Avant Garde form of dress

    www.elsahoffmann.co.za
    www.intimateimages.co.za

  8. #8
    Premium Member elsahoffmann's Avatar
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    Default Re: Brain Freeze :-) Resizing images in Lightroom

    and yet some more:

    I consider this phenomenon rather normal. whenever I process a jpeg file in Photoshop and save it as jpeg of the maximum quality, the file size will be more than twice as large as the original.




    Nudity is the most Avant Garde form of dress

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    www.intimateimages.co.za

  9. #9
    Frequent Member delboysafa's Avatar
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    Default Re: Brain Freeze :-) Resizing images in Lightroom

    Well thats all clear as mud :-) :-) Thanks guys, really appreciate it. Thanks Simon on the sizing guide.
    Delboysafa

    'Always be improving'


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