The Ideal Camera for Trekking - a wishlist

Background

I recently did a high altitude trek in Sikkim.  I had a full-frame DSLR (Nikon D750) for photography/videography along with a general purpose zoom lens (Nikon 28-300 mm), a wide-angle fisheye lens (Samyang 8mm), spare batteries and a circular polarizer.

I carried the lot in a Lowepro toploader Zoom 55 bag, slung crosswise from the shoulder and clipped with a carabiner to one of my backpack's straps, to prevent it swinging around. It all weighed 2.75 kg (6 lbs). This was quite heavy and cumbersome to lug around, which got me thinking about the perfect small and light camera for trekking.

OnePlus One Smartphone Camera Tests

Introduction

I have the Nokia 808 Smartphone, which has one of the best, if not the best, camera in any phone past or present. Unfortunately, its use as a multi-purpose device has become limited due to non-availability of newer apps on its Symbian Operating System. Also, the relatively small sized screen and resolution, coupled with an older CPU and limited RAM, makes reading documents on it a slow and painful experience.

After checking out the different models on offer, i decided to get the OnePlus One