On 1/3/03 6:44 am, "Marius Sundbakken" <[EMAIL PROTECTED]> wrote:
> > I'm not by any means an expert on optics, but here's what I've read any my > understanding (I'm sure many of you already know this): The focal length of > a lens does not change when you put a lens on a digital camera with sensor > smaller than a 35 frame of film. A 300mm lens remains a 300mm lens. A > 16-35mm remains a 16-35mm. What does change, however, is the (field) angle > of view, so a 300mm will have the angle of view of a 480mm (1.6), but it > will still be a 300mm lens. A non-full frame digital camera gives a crop, > i.e. you could achieve the same with film (resolution and depth of field > aside) by cropping to a smaller part of the frame and scaling that part up. > > I think I got that right. > > -- > - Marius > Hi Marius, Sounds good to me! Think of it something like large format, where the lens has a circle of coverage larger than the film to enable movements to be carried out. The chip in any digital SLR (other than the 1Ds, Contax N Digital, and the upcoming Kodak (if it ever appears!) is smaller than a 35mm frame hence part of the image circle is not used that normally would be. For a technological genius this fact does open an intriguing possibility of having a "shiftable" chip to allow movements with any 35mm lens. I wonder if it would be feasible? Tim * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
