Generally speaking, all photos taken with a camera or mobile phone are saved as standard JPG files and we can process them without a problem. However, if iPhone images have been saved in HEIC format, they’ll need to be converted to JPG using Photoshop, MAC or an appropriate website. A quick Google search of “HEIC to JPG” will give you some options for converting the format of your photos.
However, if you have made any corrections or modifications using editing or post-production software (Lightroom, Photoshop, etc.), or if you would like to print out scanned images, the JPEG files exported must have specific parameters to guarantee maximum compatibility. Some parameters can be set before saving the file, whilst others are set when exporting the file.
Here are the parameters we recommend using:
• ‘Baseline standard’ JPG format (available in Photoshop)
• sRGB profile (sometimes shown as sRGB IEC61966-2.1); if the profile is different, select Edit → Convert to profile and select 'sRGB IEC61966-2.1' in Photoshop
• 24-bit depth (8 bits per channel)
• Max. 254 DPI (≈ 5000 x 3500)
• The size of each file should be no bigger than 12 MB.
As a general guide, we always recommend printing files exactly how they have been saved on your camera or phone.
Never enlarge images using editing software if you would like large-scale prints - artificially increasing the resolution does not improve quality and often makes the files too big for the software we use.