hi only just seen this thread
i spend 5 weeks a yr over there. feb may and 3 weks in nov dec
its a great island for photography, but you need to get off the sun lounger and get out and about, hire a car and you can get all over the island, loads of little coastal villages and places you will only see if you get a car
up in the mountains in the teide national park. the are loads of lunar style landscapes.
get up teide for sunrise or stay late for sunset, they are spectacular.you are way up above the clouds
also if you stay for sunset hang around till it goes dark as the star trail images with teide in the background are amazing . or park up near the observatory and photograph the buildings with star trails
http://www.nightsky.at/Photo/OT/
it does get cold up there at night or early morning. we take blankets and flasks of coffee and loads of food,
up around masca is nice but winding mountain roads.
there is lorro parque up north, with loads of birds of prey and killer wales , dolphins and more
or take a 5hr boat trip to see if you can locate dolphins in the wild
santa cruz the capital as loads of interesting buildings
oh and not to forget amazing sunsets . from most of the resorts
i take a lot of my gear, zooms wide angles. extra memory cards unless you have a laptop or portable hard drive.
as for tripod. i bought a cheap velbon in one of the electrical shops. not brilliant but lightweight and better than nothing, and i leave it over there with freinds who live there
the photography shops are now not good value. prices are a lot dearer than over here. and the exchange rate is not very good. if you see anything you fancy check it carefully and if possible research it at an internet cafe before buying.
ill try and post some images when i get time and if you want anymore info let me know
with all the places to see you wont have any time to lounge around the pool