What a beautiful Pitts! Nice shot. Do you use Matrix metering or spot metering for your airplane shots?
That's correct, I was using Shutter priority, and didn't really want it to be f/22, that's just what happened. That's a great recommendation for a ND filter. What density of filter do you usually use? 2-3 stops?
Thanks, that Pitts is a beautifully restored airplane that is housed at a little private airstrip called Sugarbush airport. This was actually shot during practice before a little airshow that they put on every couple of years. The plane was doing a low altitude high speed pass to drop it's tow line after towing up a glider with the airport owner in it.
My ND filter is a 0.6 which equates to about a 2 stop reduction in light. I haven't had much opportunity to try mine as of yet, but hope to soon. I would think though that 2 stops should be sufficient (especially on a cloudy day such as what you experienced). On a bright sunny day it's possible that a 3-4 stop filter might be needed, but I'm not entirely sure on that. I need to take my filter out to the local airport on a sunny day to see what kind of results I get.
If you're interested, here's a couple of links to more photo's from the airshow mentioned above as well as some to an airshow I attended earlier this year.
Sugarbush Airshow 2013
Great New England Airshow 2015