I think your results are quite promising. The images look sharp and your lighting seems to be effective without creating hotspots. You're a little short on contrast, but this is something easily improved in postprocessing.
I think you're a bit limited by the Optimizer posting process, and the extra space you're allowing in your crop. The images are a bit too small for proper evaluation and grading. Crop to the exact edges of the coin because every bit of extra space is filesize the Optimizer has to reduce to fit the image into 100kb. If you have the image size available, shoot for an 800 pixel diameter for the coin, and don't be afraid to host offsite (Photobucket or equivalent) if necessary.
I think you're a bit limited by the Optimizer posting process, and the extra space you're allowing in your crop. The images are a bit too small for proper evaluation and grading. Crop to the exact edges of the coin because every bit of extra space is filesize the Optimizer has to reduce to fit the image into 100kb. If you have the image size available, shoot for an 800 pixel diameter for the coin, and don't be afraid to host offsite (Photobucket or equivalent) if necessary.























