Peter continued:
"Hi Artie, it is fine for us to have different opinions about this as it is all very personal.
I only speak for myself and everyone is free to do whatever they like.
For me, any technical factor like sharpness, exposure, DOF, and even composition is a must have. If one of these factors is not perfect - image goes to the bin as painful as it is. (usually it is deleted in the camera to avoid further heart aches... ). I will also put in the bin any photo that can not be framed as a 2;3 ratio or close to it.
As to head turn - this is a different story and it really depends on what is going on in the image. A simple head shot with a less than "perfect" HA - is not a keeper for me. However, an image like this when the bird is doing something - is fine in my book even if the HA is not "perfect".
In many behaviour shots HA is not "perfect" but they are still fantastic images. I really think people should concentrate on the factors they can control and less worry about HA."
And I responded:
"I agree of course that all opinions are personal. I have some square images that I love so we disagree there too
As well as some killer panos. I agree that there are some images with less than ideal head angles that are fine. But it is rarer than rare to find an image with a less than ideal head angle where the photographer (as Blake recognizes with this image) would not have preferred a better head angle.
Here is where I disagree strongly in part: "I really think people should concentrate on the factors they can control and less worry about HA."
I agree that when you are photographing spectacular flight or action that you need to make a sharp image and worry about the rest later. But as we see on this and other forums every day, folks are far too often making portraits of birds with the heads turned away from the viewer. This is often something down out of ignorance. And it is something that they can control by learning to push the shutter button at the opportune time. And once folks become aware of head angle, they are in a much better position to do just that.
I have some mighty fine images that I deleted because the head was turned 1/2 of one degree away from parallel to the imaging sensor, but heck, that's me
"