Canon EF 24-105mm f4L II IS lighting One of the best point-and-shoots

One of the best point-and-shoots ever made

This tube will give you an additional 82mm- a substantial amount when combined with the RB's already impressive built-in bellows extension

The Pentax K-AC50 is an AC adapter for Pentax K10D

that's just the way it works

but it's worth noting that the ISO selection dial does not lock

Canon EF 24-105mm f4L II IS lighting One of the best point-and-shootsThe Canon 24 105mm f4L IS lens is a good quality full frame all around lens with a useful focal length range from wide angle to short telephoto plus a constant f4 aperture and an image stabilizer. In excellent cosmetic condition, with clean optics and good function. Includes hood.