Canon 6D doing birds in flight. Shot with the Sigma 120-300 2.8 OS + 1.4x TC on the lens, AI Servo, apertures f/4.5 and 5.6.
Key Largo, FL
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(24Lii, sigma 50A, 135L), and for the other ends of the spectrum, sigmaEX 14mm2.8 and sigmaEX 100-300F4.
By the way these are shot between ISO 12800-16000. 




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