It really depends on how much resolution you want to get out of the images. Full-frame SLRs currently go up to 50MP and combined with a telephoto lens you can get really high pixel densities. I suspect that you have in mind something more rough and ready to obtain visual rather than detailed information in which case I would be considering the durability of the camera more than anything else. Cheers, Mike
Different make high speed digital camera for photography and videography are available.
www.hsvision.de/High-Speed-Camera
www.optronis.com/
www.ioindustries.com/
cameras.about.com
www.hsvision.de/High-Speed-Camera
Kindly look to information and diagnose the time lapse interval vs. landslide. nature of landslide also one of the very important component in selection of time lapse camera to record the landscape under precious fraction of movement.
We have recently used the Reconyx (http://www.reconyx.com/) PC800 HyperFire Professional Semi-Covert IR with a HyperFire Heavy-Duty Security Enclosure and got some very good results for monitoring glacier changes at a remote site.
Let me know if you need more information. Cheers, Lukas
Time-lapse photography is usually used to speed up gradual motion. How long is the landslide event you are trying to capture? Forgive my ignorance of landslides! I would have thought that what you are trying to capture will be over quite quickly? In which case a high-speed camera (many frames a second for creating slow motion seqs) or continuous or burst shooting (several photographs a second) is required to capture the event. Any good DSLR with a telephoto should be able to do the latter.
It all depends on resolution v cost. I use a trail camera for photographing the change in woods near me as I find 10mb images OK for computer viewing but for photographs and fine detail you need to use either a bridge camera or SLR ( film or digital 30mb+)