I'll go on photo hiking with very expirienced in that region mountain guide in Turkey, Cappadocia for 8 days. We will be compact group of 4 people, so ideal for photoshooting. 1 guide,1 model, 2 photographers. So, Landscapes and some portraits. I'm planning to get Canon 5d2 + 16-35 II and 50 1.8. My friend photographer will get 5d2+ Canon 70-300 IS non L and Canon 100mm 2.8 macro, which we intent to use also for portraits. Excellent tripods also. Filters - CPL, we intent to use exposure bracketing. (we don't shoot usually landscapes.) 10km daily on not so difficult terrains (up to 1700m) My biggest dillema is for the telezoom, which I to bring or buy. Now I have: 1/ Canon 70-200 2.8 IS II - weight is concern, but more security reasons (unwanted attention getting) 2/ Canon 70-300 4-5.6 IS non L - At f/16 on tripod I find that 70-200 is better lens. I may be looking too much on image details. Rotating front element - for using CPL 3/I may get, cause I found 200mm short on FF.: 1* 1.4x or 2x teleconverter to use with 70-200 2.8 IS II, 2* Crop body like 60d/7d, which uses the same batteries. I'm not concerned for back up, it's OK to use one 5d2 with my friend. 3* Another telezoom>200mm. Suggestions? For Canon 100-400 - I'm not convinced whether it's much better than Canon 70-300 at f/16 on a tripod. Also between 35mm and 100mm there will be bigger focal length gap vs. 35 to 70mm. What are your suggestions & recomendations to bring/buy ? Thank you very much in advance!