The negative space and warm feel of this shot is very nice. I think that as far as meeting the challenge goes, it does so as well. This shots only negative that I really can comment on is that the focus seems soft. I don't know if it's because you need to do a sharpen after resizing to this size, or if it's because the actual focus was off. The lighting is well done and I imagine keeping stray reflections from showing up on the glass was no easy task.
Your shot is nice. It has an old world feel to it.
This is very clever. I was hoping to come up with such an idea that was both mathematical and fun--and good photography. the two circles work wonders here, and it was a stroke of genius to fill only the circle and leave a void elsewhere. Nice work!
I love your idea here and you've really implemented it very well. The lighting is amazing, the negative space around the magnifying glass does this image a lot, good job!
Very nice photo. Love the use of light and the coloring. Focus works well. This smaller picture gives a weird effect on the color in the magnifying glass, but that is to be expected.