Sigma 100-400mm f5-6.3 DG OS HSM Contemporary for Nikon F m42 but the viewfinder image is

but the viewfinder image is bright (for a Rolleiflex 3

The Lowepro Computrekker AW is a mid-sized backpack with a well padded main compartment and a laptop compartment suitable for nearly anything with a 15" screen

Interior dimensions are approximately 12x16x25cm

coverage is at least "full frame"

with case and strap

Sigma 100-400mm f5-6.3 DG OS HSM Contemporary for Nikon F m42 but the viewfinder image isThe Sigma 100 400mm f5 6. 3 DG OS HSM Contemporary is a reasonably compact full frame telephoto zoom lens with quick focusing, excellent image quality, and an effective image stabilizer. Cosmetic condition is good, with some finish wear; optics show light dust. This lens is designed for Nikon F mount DSLR cameras, but it will also work on most autofocus Nikon F mount film SLRs.