Initial thoughts/My opinion Great play of colour and texture/lines. Too artistic and not scientific enough to fit for NG IMO.
Content/Composition What a colourful image! I like the bended lines and also how you arranged them along the diagonal. Having the upper right more blurred is nice too. The compositional problem I do have with the image is the fact that it is not clear at all what I am looking at. Even with the title I don't know what part of a feather and what bird's feathers I see. Thus having more in focus would have worked better IMO.
Camera work -technically Focus is way too narrow, even the sharpest parts are not very clear. Light and exposure are fine.
Digital Processing - Technical No issue here. Seems that not much digital work has been applied and it is also not necessary too.
Fits the challenge Here I see the problem I and the voters had: it's more an artistic image and not one of the very clear and crisp NG-images one has in mind. Showing microscopic features do fit for NG but it should be more like "Aha, that's how things look in detail!" and not "What is it?".
This might have done nice in "pwl". I like the wild colors and the dof. There isn't enough information to know it's a feather, but it sure is a pretty abstract.
I see the idea and I like the patterns. Personall (and I know this is a very personal observation) it would have been nice to see a greater depth of field.