Jerry, the reason for lack of detail is simple.
You ran out of pixels.
It's not the lens, not the exposure, you just plain ran out of pixels.
In the image below (your original with my marks), the rectangle marked is just 351 X 289 pixels. The real question is: how can you show (literally) thousands of feathers in just 351 pixels? No amount of cropping is going to change the fact that you just don't have enough information to show the kind of detail you're looking for.
According to some rough calculations, you'd have to have, I don't know, 3-5 feathers -per pixel-!!! Your subject only occupies 1.4% of the available pixels. Just not enough to capture detail.
You just have to get closer to the subject with the H5 or pretty much any DSLR with a lens that costs less than $7-8,000!
Post-processing
Nonetheless, for what it got, the H-camera did pretty darn well in resolving the minimum pixels. I was able to recover some value in a relatively small crop (It might make it to 8X10 with a little up-resolution, but it's borderline)
I fixed the levels, color balanced it a little better. Did some noise reduction and then applied Smart Sharpen. I used Shay Stevens' Photoshop action to remove the fringing on some of the branches. When done, I brightened the catch-light in the bird's eye to give it more "life". The light was there, it was just really darkened down by the processing. I brought it up quite a bit.
This is the result. While far from perfect, it's probably the best you can hope for when cropping down to such a tiny subject relative to the frame.
The biggest problem I see in post is the over-sharpening in the original image (done in post-processing?). Unfortunately, that's not really fixable. There are halos (brighter lines) on the top and bottom of most of the branches. I used a little selective noise reduction to blur that a bit (I deselected the bird) but you just can't kill it. Now you know why "less is more" in sharpening! Sharpening should be the very last thing you do in processing an image.
In this blowup, you can clearly see the sharpening artifacts and lightening along the branches:
The only other thing this might be is some badly-removed fringing, plus sharpening. Did you remove purple fringe? Or is this just a tad too mush unsharp mask?
Oh well, hope this helps. My final advice: get closer!!!
Seriously, no DSLR or fancy lens would have made this a better picture at this resolution and distance.
As I mentioned in another post, it's all about technique!
Keep working at it! If you get one or two good pictures out of 100, you're doing really well. Plus, failure is the best picture. Every day I thank heavens for the Recycle Bin!!! (LoL!!)
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=~ AAK -
http://www.aakatz.com
=~ Author of the H-Series White Paper
=~
http://www.aakatz.com/h1whitepaper