Originally posted by Pål Jensen For a cropped 645 format DOF is no problem unless one wants to exlore some really extreme near/far relationships. For digital most if not all the effects of tilt/shift can be achieved with cheaper means. Hence, the market for a Pentax tilt/shift lens is very small indeed....
I agree that tilt/shift lenses are specialised and only cater for a very small part of the lens market, but people that are in that field have specialised needs for a reason, there are some things that you can do with tilt shift lenses that are impossible with ordinary ones. I know with 40Mp it will be easy to crop and adjust for perspective distortion, but I prefer to do all that stuff in camera - which means actually using a tilt shift lens. but correcting perspective distortion isn't the only thing T/S lenses are good for, there is the scheimpflug and anti-scheimpflug* techniques that have applications in architecture, landscape and portraiture and fashion photography.
*anti-scheimpflug - while based on the scheimpflug principle it is used to give the illusion DOF which is far shallower than a conventional fast lens.