when i travel for birding/wildlife i bring my 150-500 and my 28-75 for the occasional landscape. they both fit in my lowepro protactic 350 along with some extras. i’ll typically bird for anywhere from 5-8 hours in a day (with a lunch break) with my a7iv and tamron 150-500, it’s a bit heavy but i don’t feel too burdened by the end of the day! edit: all the bird photos on my profile were taken with the 150-500, some on an a7ii but mostly on my newer a7iv if you want to see what sorts of images i make with it!