Hello Vicki


Maybe not a complete answer to your enquiry, but maybe this will help for the future.


Take your photographs at the highest quality setting that you can on the Canon; this should be more than adequate for any publishers. As long as you aren’t doing billboards, your camera will be perfect for almost any job.


300 dpi has, as far as I am aware, been perfectly OK for printing for some time.


As with computers, where programs expand to take up any increase in processor power and/or RAM, so as cameras increase in quality people ask for increasingly larger and larger files, with higher resolutions.


All the printed images I have seen recently have probably been 300dpi, and there was nothing wrong with any of them. There does come a point where the eye cannot resolve any better than it already does. Personally, I am at that point!


Hope this puts your mind a rest a little….



Iain Duncan


RAF Museum.



From: Technical Advisory Service for Images [mailto:[log in to unmask]] On Behalf Of Victoria Perry
Sent: 07 September 2006 10:29
To: [log in to unmask]
Subject: Digital images and file format/resolution




I am a little confused about file formats and resolution so I hoped that someone might be able to explain it to me. We had some pictures photographed yesterday to send to an author who is to publish them in a book. When the photographs were downloaded onto my computer they were in a Jpeg format and the resolution was 72dpi. I have been told that digital images for publication should be at least 300dpi and preferably 600dpi and in TIFF format if we are sending them out on a cd. However, to me the image quality looks fine. Am I missing something? The image size is 4368x 2912 pixels and the bit depth is 24. The images were taken with a Canon EOS 5D camera. We are just making the transition from providing slides to providing digital images so I would appreciate some advice on how to do this.







Vicki Perry,

Assistant Archivist,

Hatfield House,


Herts. AL9 5NF