We are requesting the images to be loaded into the new online exhibition software are at a 300 ppi resolution to provide a good quality file that could be used when printed in a catalogue rather than the lower resolution of 72 ppi as typically used when generating a file for projection or web use. This higher resolution would not change the quality of the projected image.
In some cases the file size can be larger when generated at a 300 ppi resolution than a file created at 72 ppi. However with a maximum allowable file size of 3MB it was unlikely that an image resized to a maximum of 1400 x 1050 pixels would exceed the 3 MB limit. The nature of the image will have the biggest impact on any difference in the file size, the more fine detail and the more highlights / light coloured detail will tend to increase the file size more but we feel that with an overall file size limit of 3 MB there will be only a very limited number of images that need to be resized downwards to meet the restrictions.
If the exported image is larger than the 3 MB file limit then the person creating it would need to amend the Jpg compression either by moving the Lightroom Quality slider from 100% to say 70% or reducing the ‘Quality’ value from 12 to say 8 in Photoshop of Elements, this would reduce the overall file size whilst not impacting on the quality of the projected image. These are the instructions given by many international salons.