Has anyone actually ever used one of these things?

http://cgi.ebay.com/Moveable-Large-F...item4cf3df86ce

This is the Nikon version, they have others as well such as Canon. I suspect regardless of brand of DSLR, they all work the same. The only reviews I seem to find on the net are you need to use at least a 135mm to 150mm lens otherwise you are compressing your bellows too much.

I've uploaded a photograph too. Looks cool, but $200 is still $200. However I am looking at these new tilt-shift lenses from Schneider for digital SLRs, and the prices are around $4,000. ACK! I dunno about the rest of you, but if I had a spare $4gs sitting around that had to spent on camera gear, there are some real pretty 8x10 field cameras I would be looking at first.

Apologies if anyone has already covered this here in the forum, I looked, but couldn't see anything specific for this back. Also apologies if I am crossing the line between formats too much here, but personally, when I hike, I often take BOTH my 4x5 and my digital SLR and if this thing is actually any good, it might be great for me

thanks
joe