depends on your target group. I'm pretty sure that there are much more people looking for photographs of foreign places with some explanations and maybe some travel information than serious amateur or pro-photographers who can interpret the technical data.
having said that: if you have a site with technical information that makes it to the top of the search engines for the keyword "photo technique" or something of the sort, I would expect lots of visitors as well.
Of course, relevant photo rings can help a lot as well!
My own travel photo site has mostly images and very little text, but consistently about 40000 (or more) hits per week.