Very nice images @jtlee321 . The real test is if you can get images like this one through plastic. Just to clarify, you mean, take 256 to the power of 3.
Your assignment is to write OCD 500 times on the blackboard... LOL. Thankfully my OCD is not that bad, as you can see in the post above, I had written 256 x 3 rather than 256 to the power of 3 which is what I meant.
It's odd that the preview image appears to be extremely over-sharpened, but the full-size image is fine. It looks like the forum software is applying a heavy amount of sharpening to the image when it downsizes it for preview. Not many folks post full-size images, but I also see the same effect on the other image that is linked in this thread.
That would be my guess as well. As I don't apply sharpening to the image at all. Because I have noticed the same "over sharpened" look on my coins that are posted here. Do you think it could be the algorithm being applied to the size reduction in Photoshop? I alway's choose the Bicubic Sharper (Reduction) option and reduce the image by an even factor of 4 for display here.
Has anyone tried using the HDR feature of your camera and processing with Photomatix or software like it?
I've used that software for some of my landscapes where I have a scene with a very large dynamic range. Personally I think it get's used for an effect rather than proper use. For coin photography, there is really no need for HDR as the lighting is being controlled. The dynamic range of these kinds of images fall well within the capture and display abilities of nearly every modern device.
How did you post the full-size image? Did you create the preview image as well? I assume your other posted images, with 4x redux, don't show this over-sharpened appearance. The images I've posted here don't look like they've been overly messed-with but they are usually not down-sized. I think I'll do an experiment... Regarding HDR, I've tried it on coins but it created an un-natural look to the coin. I'm not an expert at HDR so don't know how to adjust all the parameters to give a more natural appearance.
The full resolution images are hosted on my server. I used the image link button above instead of using the upload a file button below. The forum software must be generating the smaller previews of the full size images.