These shots certainly tell an amusing story - that of competing interests at the feeder. I see continuous competition at my feeder between sparrows, finches and redwings. Sometimes it's like musical chairs.
Provided you have a stable enough tripod, how about using a lower ISO setting? At 3200 you're losing some definition in the pictures. I have a pretty stable tripod, and I also use a flash extender on my speedlight to help provide illumination. This allows me to use lower ISO and lower shutter speeds, down to 1/125 sec on my Sigma 150-500 mm.
Hello Rassie, I see you are also using the Sigma(150-500). This lens exceeded all my expectations. Handheld I took some pictures at 1/25 (1/25). Attached 1/30 very early morning. I would like you to test your Sigma.
Aart, I shot many hand-held pictures with this lens on my D90 before I invested in a decent tripod. And I managed to get many keepers as well, even at relatively low shutter speeds. The D90 had basically the same sensor as the D300.
I found the D7000 with its higher pixel count to be less forgiving of hand-holding. To hand-hold the D7000/Sigma 150-500 mm combination typically requires higher shutter speeds than what I managed to get away with with the D90. Other folks in these forums have experienced the same - the higher the pixel count on the sensor, the more even the slightest movement results in unsharp pictures. This will be even more pronounced on the 24+ mp sensors in the D7100 and D800, etc.
I now prefer to use some kind of stable support whenever I use this lens. It results in many more keepers than when I hand-hold.
Thank you for your reply. I have used the lens hand held in Florida for birds in flight with good results. Spring here has been very wet and dark. The little birds move faster than the big Florida birds.
Interesting indeed. Thank you for posting. I am always surprised at how much motion blur one get, even at high speed. Not too many decades ago, 1/1000 was about as fast as a good commercial camera could achieve.