When I convert a raw file to JPEG, the JPEG file ends up being about a third the size. Why is that?
Aperture 3, OS X Mavericks (10.9)
Your export options. They control the file size and quality of the image.
Yes, I max it out and still end up with about a third the size.
Max out what? How are you exporting? What settings are you using? Can't really explain what you are seeing if we don't know what you did.
You aren't dragging the image out of Aperture are you? If you do that you are not exporting, you and getting the preview image.
I use export and select JPEG original size 16 bit under export preset. What I might try is selecting the edit option from the drop down and select 100.0% of original. I want to send this file for printing large prints 20x30 and larger. I get a better conversion using Nikon's NX2,I would rather not have to do that.
Remember the name of an export does not force it to be what he name implies. That is any preset can be edited and the name left as it was. Make sure the preset you are using is really set to the settings you want.
Also with JPG;s the quality slider will have the most effect on the file size of the output file.
Also if you are sending this out to print see if they take a Tiff file. You'll get better quality.
I figured out some of that will try the quality slide, have moved it to 12. The place I use will only work with JPEG files, which is true for many of the mail in/ online services. Thanks Frank.
How are you measuring size? If in bytes, why are you concerned about the size in bytes compared to a RAW file of the same pixel dimensions?
JPG, Original Size, Quality 12 is the best JPG file you can create of an Image in Aperture.
Jemrider wrote:
I use export and select JPEG original size 16 bit
Is that correct? I didn't think JPG could have a higher bit depth than 8 bits.
If you need top-notch quality prints, use a printer that accepts (and knows how to print) 16-bit TIFFs.
When I convert a raw file to JPEG, the JPEG file ends up being about a third the size. Why is that?
