To photograph Nepal’s diverse attractions you need a variety of lenses, from a wide-angle lens for compact temple compounds to a long telephoto lens for mountain shots or close-ups of wildlife.
A polarising filter is useful to increase contrast and bring out the blue of the sky.
Remember to allow for the intensity of mountain light when setting exposures at high altitude.
When it comes to taking portraits, remember that the bright Nepalese sky and darker Nepalese skin can be too much of a contrast for your camera. A fill-in flash can do wonders to the quality of your images.
Itinerary
Almost all flavors of memory stick, flash card etc and batteries are available in Kathmandu. Note that travelers have reported buying cheap cards in Kathmandu that do not have as much memory as the packet claims.