So, in 3 weeks I'm off to Iceland for 4 days. I've just started thinking about what kit to take with me and have begun to wonder whether I should rent some lenses to get the best photography experience I can out there. I currently own a 24-105mm, 70-300mm L, 14mm Samyang 2.8, Sigma 24-70mm 2.8. Now this covers pretty much all the focal ranges I'll need, however, I want to make sure I've got the right kit for the job. Do you think it would be worth renting a 16 - 35mm 2.8? This would possibly improve my landscape shots, but also it may be better to have an automatic focus (unlike the Samyang) for the northern lights shots. Has anyone else ever been at this time of year and can offer some advice on if they used some lenses more than others and why?