The following is a comparison of five variations of bird photography: Digiscoping with a point-and-shoot [Nikon Coolpix 5100] Digiscoping with a digital SLR camera [Canon EOS Rebel XTi] Telephoto with Swarovski TLS800 adapter and digital SLR [Canon EOS Rebel XTi] Telephoto with 100-400mm lens [Canon] Telephoto with 100-400mm lens and 2x extender [Canon] The subject