The easiest way to compose it in photoshop is by photographing the lens and flash on a contrasting background (e.g. bright green) and then use the mirror shot as a background. You can clearly see this is photoshopped because there is no reflection of the lenses in the mirror. There is also a depth error on the flash (it looks like it's behind the guy's hand). Also the text on the lenses is not reverted (you can see a clear CE logo on the left lens). The image is also heavily compressed (look at the low range of colors in the darker areas), compression often helps to hide composition artifacts.
