Ron29 wrote:
Going to visit the places listed in the title in mid March. I have a Canon 70D and two lenses, a Canon 18-135 mm STM lens and a Canon 70-300 mm L glass lens....
Regarding Cuzco and Lake Titicaca which lens that I have would be more appropriate? Obviously my 70-300 mm lens yields better image quality but can be heavy to lug around all day to.
I agree with previous responses that your kit might be a bit too heavy for hiking around at high altitude, as you'll be doing.
I would want a wide angle lens for some of the scenic vistas you'll be seeing... Canon EF-S 10-18mm IS STM is relatively inexpensive, small and lightweight ($270, just over 1/2 lb.... lens EW-73C hood sold separately, but important, $25.)
If you don't have the hood for your particular 18-135mm, be sure to get it too. Lens hoods can both improve your shots and physically protect the lens from bumps.
The 10-18mm and your 18-135mm would actually give you more range of focal length on your APS-C camera than most film shooters ever owned or used in their lifetimes, back in the day.
But if you still want a telephoto, I'd recommend an EF-S 55-250mm (lens hood sold separately) instead of the 70-300L. The EF-S lens is 1/3 the weight and half the size of that L. It's under 1 lb., versus almost 2.5 lb.
Your 18-135mm should serve as a good walk-around lens, with the other two occasionally supplementing it for the shots beyond it's capabilities. However if you felt the need for a faster lens, the EF-S 17-55mm f/2.8 IS USM would be a good choice. It's not much different in size, but is a few ounces lighter than the 18-135mm too.
I'd also always take a set of macro extension tubes, which are light and small and easy to tuck into a camera bag or backpack. They can make any lens closer focusing for near macro shots. I use the Kenko set and think they're a good value.
The other primary accessories I'd want would be a high quality circular polarizer (B+W XS-Pro or F-Pro are a good value). Specifically, I'd want them in sizes to fit the wide angle and the mid-range zooms.... less likely to need one on the telephoto zoom. If those two lenses happen to use the same size, great! Only one C-Pol would be needed. But if not I'd get them in whatever sizes those two lenses require.
A final accessory I usually carry is a small flash. Yeah, the 70D has a built-in that can serve in an emergency, but those basically suck. Built-in flashes are weak, slow to recycle, in the worst possible place to cause redeye and ugly shadows, and they draw heavily on the camera's battery. A separate flash solves all those problems.
Extra batteries, a charger that can be used with the local electrical system, plenty of memory cards, lens and sensor cleaning kits would complete my kit. Some of that stuff could be left in a hotel safe or other secure location when not needed for a particular day trip.