Hello! 1. If you serious about lenses, you can easily find which lens was used to make any particular image. As you can see in "Camera Data", this image was taken by the "Canon EOS 400D DIGITAL" body. There is no any information about lens, except Aperture and Focal Length. But in most cases Focal Length is enough - there is just one Canon macro lens with 60 mm Focal Length - this one: [link]. 2. This image was made in natural habitat, so yes, we use this housing: [link]. It's crappy in terms of comfort but reliable and, most important, relatively cheap 3. Thanks!