The airplane is a Halberstadt D.V.
I'm not the greatest at instant pilot recognition, but to me these men look like pilots from
Jasta 5:
OfStv Edmund Nathanael (far left)
Ltn d R Heinrich Gontermann (far right)
Vzflgmstr Max Winkelmann (second from right)
Can't tell for certain but perhaps
Uffz Paul Hoppe, second from left?
Winkelmann was downed and made PoW on 26 January 1917 (
The Jasta Pilots, Franks, Bailey, Duiven, p. 299), which would date the photo as having been taken before this. However, at that time Nathanael was in
Jasta 22; he joined J5 in March 1917.
I'm sure others will chime in and fill the gaps.