Composition - Good choice of subject for stock photography IMO. I think the simple aspect of this photo makes it very suitable. The subject is very centered in this photo and I think it has to be. You might have left a little more room at the top and bottom of the photo though. I don't like the little blue dot on the left side of the apple. It is pretty distracting and I can't think of what would cause it. This background might be a little light. I'll elaborate more in the technical section.
Technical - Most of the problems that I see with this picture have to do with exposure. The bottom half of this apple looks black. It is really underexposed IMO. I think the light needs to be brighter and moved perhaps a little more to the right judging by the highlight. I think with the background being so light, it would be difficult to properly light and expose this photo so as not to wash the background out or leave the apple dark. If the exposure was more the background would most likely was out. This might be a good place to use the grocery bag background trick. I think with that dark a background you could effectively light the subject and not wash the background out. As it stands I feel the apple is underexposed. The focus is good. The crop is a little too tight.
Overall - I like the simplicity of this photo and I think it meets the challenge. The pic needs a little less contrast so that the exposure could be increased without fear of washing the background out. The crop could leave a little more room on top and bottom. Hope this has been helpful to you. Good luck in future challenges Boyte - Bob
One apple ready for the stock photo catalogue, good one. The challenge had been met for sure, the apple could be a tad sharper and lighter at the front. Did you eat it afterwards?
Nicely lit shot but the focus needs some improvement. The bottom of the apple has good focus but the top is slightly fuzzy. Stop down some and the image would be improved a lot.
excellent job with the lighting... I believe that it may be possible to bring out the red on the face of this apple with some additional light coming into the frame from the lower left... - setzler