Lenses from Left to right:

Soligor "Blk" 350 f/5.6
Soligor "Slvr" 350 f/5.6
Pentax Super Takumar 300 f/4
Pentacon "P6" 300 f/4 (medium format)
Canon 300L f/4 IS
Canon 300L f/2.8 IS
Sigma 120-300 f/2.8EX IF APO HSM
Sigma 300 f/2.8 EX APO HSM
Sigma 100-300 f/4 EX IF APO HSM
Sigma 300 f/4 APO HSM