----- Original Message ----- From: "tdtran tran" : I'm new to the forum and cameras as a whole. I'm looking for a camera for : high speed application. : Specifically I need to capture a moving vehicle travelling at 100km/hr and <clip> : I'm not sure where to start learning what I need. Specifically I would like : to know what type of lens I need, setup (how far away to put the camera : etc), the type of detail I can get, and anything else that may be relevant. <clip> : Could someone please point me in the right direction (texts, online : materials, someone I can talk to etc). I'm sorry if this is the wrong place : to ask. A number of methods come to mind, bare with me here as I'm dosed on medication and prone to make little sense at the best of times.. One method is to clamber aboard a vehicle moving at the same speed in the same direction then pick whatever lens suits the angle of view you want (50mm is boring but a 20mm looks nice if you can get low to the ground!) Another technique involves panning with the vehicle as it passes you, again choosing an angle of view which best suits your needs.. Finally you could stand 40 feet back with a fisheye and get the vehicle pin sharp at 1/500th of second but it'd be kinda small in the frame. For a sensible comparison of focal lengths created by me in a more lucid moment, see here: http://tinyurl.com/cymdc in this page the word 'perspective' means distance. I find the series helps comprehend expansion and compression of detail relative to angle of view better than many of those pages which show a whole mass of buildings progressing from teeny dots to a single framed window ..if you catch my drift Personally I'd prefer to travel at high speed with my subject, it's kinda fun and you have plenty of opportunities to take lots of shots k