Post processing to flickr

Hi,
I usually shoot in RAW and use aperture 3 to export to jpeg format. In the export menu it usually states what quality (I usually do the highest number 12) and DPI (I usually put 300)
Is this overkill?
I don't want the photo to lose any quality and look as sharp as possible, but the files are rather large like anywhere from 8-15mb.
Any suggestions?

Thanks for any help
Adam

DPI does nothing to digital files - nothing what so ever. Its a property that printers read to tell them how many dots to assign per inch of paper when printing the image itself. As such presentation on the internet no programs will be reading that value at all - you can set it to 25 or 20000 and the image will still look exactly the same.

As for quality at 8-15mb it sounds like you are saving fullsized shots. Myself I never upload anything bigger than 1000pixels on the longest side, you really don't need anything much bigger when presenting online and even then many places limit you to smaller sizes yet.


Myself I save a fullsized version as a PSD file (to preserve my layers from editing) and then I resize the photo in stages down to 1000 pixels on the longest side, sharpening at each stage to account for data loss due to resizing. I then save the 1000 pixel version as the highest quality setting (as you do already) and then upload that to flickr. Thus on my computer I have two copies of most - the fullsize PSD and the JPEG resized version.

[QUOTE=Overread;137460​18]DPI does nothing to digital files - nothing what so ever. Its a property that printers read to tell them how many dots to assign per inch of paper when printing the image itself. As such presentation on the internet no programs will be reading that value at all - you can set it to 25 or 20000 and the image will still look exactly the same.

I just did the 300 dpi thing because I was told that when I emailed a picture to be put on christmas cards - makes sense

Yep for that use it makes full sense because the info is going to be heading off to the printer.

If you're ONLY going to be using your Flickr images for web sharing - such as on this forum or others - then have Aperture resize on export to a meaningful pixel dimension. Since POTN's limit is 1024 pixels on the long side, and since that's a perfectly reasonable pixel dimension for screen viewing and sharing, that's what I put on Flickr. People who are concerned about their images being "stolen" from their Flickr site will often use a smaller pixel dimension like 800 or 640.

As for quality, for web viewing purposes there's no meaningful difference between 100% quality (12) and 85% quality (10) - but your file size will but cut approximately in half.

As stated above, the number that's put into the "DPI" field is usually meaningless. So go ahead and put 300 because people who don't understand DPI will complain if you don't.

Cliffs: Resize to 1024px on long edge; 85% quality (aka quality 10); 300 DPI.

nathancarter wrote in post #13754912
If you're ONLY going to be using your Flickr images for web sharing - such as on this forum or others - then have Aperture resize on export to a meaningful pixel dimension. Since POTN's limit is 1024 pixels on the long side, and since that's a perfectly reasonable pixel dimension for screen viewing and sharing, that's what I put on Flickr. People who are concerned about their images being "stolen" from their Flickr site will often use a smaller pixel dimension like 800 or 640.

As for quality, for web viewing purposes there's no meaningful difference between 100% quality (12) and 85% quality (10) - but your file size will but cut approximately in half.

As stated above, the number that's put into the "DPI" field is usually meaningless. So go ahead and put 300 because people who don't understand DPI will complain if you don't.

Cliffs: Resize to 1024px on long edge; 85% quality (aka quality 10); 300 DPI.

Good information. Thanks!

nathancarter wrote in post #13754912
If you're ONLY going to be using your Flickr images for web sharing - such as on this forum or others - then have Aperture resize on export to a meaningful pixel dimension. Since POTN's limit is 1024 pixels on the long side, and since that's a perfectly reasonable pixel dimension for screen viewing and sharing, that's what I put on Flickr. People who are concerned about their images being "stolen" from their Flickr site will often use a smaller pixel dimension like 800 or 640.

As for quality, for web viewing purposes there's no meaningful difference between 100% quality (12) and 85% quality (10) - but your file size will but cut approximately in half.

As stated above, the number that's put into the "DPI" field is usually meaningless. So go ahead and put 300 because people who don't understand DPI will complain if you don't.

Cliffs: Resize to 1024px on long edge; 85% quality (aka quality 10); 300 DPI.

Thank you very helpful. I just got a refund on aperture and getting Lightroom 3 because I was able to find a whole lot more tutorials and presets free or for a small charge.