Bignerd wrote in post #18461884
I have been running some experiments to deal with a lack of sharpness in my pictures. The issue at hand is working with a tamron 150-600mm which up until now has been very sharp. I have upgraded my mount to an aftermarket gimbal mount (sevenoaks gimbal). My first thought was that I was not getting good stability from the mount. I ran an experiment with the gimbal taking pictures of a power line in my back yard. I tried all combinations of iso, f stop (and shutter speed), and found the lens and gimbal to be tack sharp, down to a very low shutter speed.
I have reached the conclusion that when photographing birds in AI Servo mode, with multiple frames (very different from the power lines), the lens is slow to focus, and between shots there is enough misfocus to reduce the image quality. The other possibility is in AI servo mode, multiple frames, with my hand on the gimbal mount, I am introducing shake and reducing image quality.
I took these pictures at Baylands Park in Palo Alto. This is a marsh area, filled with water birds. There is also a small plane airport adjacent to the park that allowed me to work on panning with the planes coming in for landing. These pictures were all taken in single frame mode, some in AI servo, and some in single shot mode. My question is, has anybody else had this sort of challenge in achieving image quality?
Hello! I have a couple ideas for you, but I wanted to ask a couple of questions first please. I own both the G1 and G2 versions of the Tamron 150-600. Which version do you have? I ran into a similar situation with G1 when I moved to a gimbal mount. Haven't with the G2, but I think that's due to learning from my mistakes with the G1...
Also, have you done AFMA on the 150-600? I found that static subjetcs in Single Shot worked well, but my AI Servo stuff was better after AFMA... Odd, but it made a difference.