All my pictures on the site are from SLR digital camera files, or are scanned from film, and of very good quality and suitable for printing at A4 or A3 unless noted as heavily cropped (in which case the subject is distant, and the picture is suitable only for a presentation). Most of the thumbnails show a cropped view, so that at least some of the detail is apparent. There is therefore a wider area round most of the pictures. Many of the landscape format images would also be suitable for using in portrait format.
I am working on changing all the pages to show a detailed part of each photo as a thumbnail of 256 x 171 pixels or similar. Clicking on this thumbnail will show the whole photo as 512 x 341 pixels or similar. This will take some time. In the meantime, please email to enquire about anything. Unless I'm on a photographic expedition, you should normally get a reply in a day or two, and frequently the same day.
The photo thumbnails on the site are jpgs made from sRGB or Adobe RGB tifs, converted from Canon SLR raw files, from D60 in 2003 onwards to a 5D, and a few from a 1D MkIII which I had for a while before I sent it back because of the well-publicised focussing problem. I bought a a 40D instead. Original images are between 6 and 12.8 megapixels. Most were taken with prime telephoto lenses - either a 400mm Canon L lens, or Sigma EX lenses, but one of my sharpest flight shots was taken with a Canon consumer zoom lens (70-300 USM, only slightly stopped down). Most of the images are sharp enough to be enlarged to create files with very large numbers of pixels if needed.
The images scanned from film are grainier than the digital images, and more contrasty, but should still be acceptable for most purposes. It seems to me that digital is now inherently superior in quality to film (apparently Canon thinks that point has been reached with 10 megapixels), and I'm glad I made the switch in 2003. I didn't use my EOS3 film camera for several months after that, then finally sold it after it had become virtually worthless!
My father's photographs on the CEP Page have been scanned mostly from 6cm x 6cm Ektachrome transparencies, some from large black and white negatives, and some from 10" x 8" prints, where that was all I could find. All these files are of good quality. Most colour scans are 45 to 50Mbytes.
6 megapixel jpgs of 3072 x 2048 or similar size, which should easily print to A4, are available immediately of most images on the site. The aim is to complete that availability as soon as possible. The site is being simultaneously expanded to include other images. Images can be provided as sRGB or Adobe RGB tifs, jpgs, or as unmounted or mounted prints as needed.