Sigma Lens Tests at 125mm:

18125 DC f4-5.6 DC

55200 DC f4-5.6 DC

70200 f2.8 EX/HSM

80400 EX/OS

In this test, I compare the 18125 DC, 55200DC, 80400 (OS off) and the 70200 at 125mm at infinity from wide open through f16. I used a sturdy tripod and MF with a Nikon magnifier. Conclusions:

f2.8 125mm 70200

f4 125mm 55200 70200 804000

f5.6 125mm 18125 55200 70200 804000

f8 125mm 18125 55200 70200 804000

f11 125mm 18125 55200 70200 804000

f16 125mm 18125 55200 70200 804000