It's been a long time since one could ride in a Canadian Pacific dome car but with the hints in this folder you will have a better chance getting perfect photos from CP's dome cars now operated by VIA Rail. The curved glass of the domes is tinted a blue colour. Taking a colour photo through the glass without correction produces an odd colour on the finished image. I haven't tried it with a digital camera but suspect that would be problematical too. The folder is 3 x 5 1/2 inches ( 7.5 x 13.9 cm ) in size and opens to 5 15/16 x 5 1/2 inches ( 15.1 x 13.9 cm ).