Hi After an initial flurry of questions I have been lurking in 'digest land' for a while. So another intro:
Photographer: travel, stock, creative (conceptual) Main eqpt: Nikon 35mm, but more recently mated to Nikon Coolscan, G4, Espon 2910 and Lyson media Question: Much of my most recent conceptual stuff requires a certain amount of manipulation in photoshop. Many images used to make 1 piece of work. Individual images often used quite small and not particularly technically challenging. Been thinking for a while that it would be much easier to capture these images digitally rather than scanning them and wouldn't have pesky grain interfering with digital manipulations either, and even that a 5-6 mega pixel zoom compact (Cannon G5, Nikon 5700 etc) would probably do the job until the cost of Nikon compatible SLR comes down to within budget for "experimental" purposes... i.e. it may well not earn its keep. However, many (if not all) of these seem to have a minimum aperture of f8. But lenses are of shorter focal length than their 35mm equivanlents, and so will have a longer depth of field (surely). How big is the depth of field of a smaller than 35mm sized CCD (of commonly used size) at, say equivalent 28mm focal length, at the minimum aperture of f8? (Expressed in terms of aperture size on 28mm lens on 35 mil camera) i.e. will a smaller than 35mm digi at minimum aperture f8 on 28mm field of view equivalent focal length lens, just about resolve from foreground to infinity when shooting landscapes, as a 28mm lens at f22 on a 35mm camera will? as a follow-on... if I was to put say, a 50mm lens from my film SLR onto a digi SLR and then set the aperture dial to say, f22, what aperture would the digi camera think I was using as it will transmit light like f22 (for exposure purposes... because it is the same distance from the projected image on the CCD, all that is happening is that the CCD is effectively cropping the image circle tighter than the film camera would) but the effective focal length of the lens has changed with the format size, and so the actual aperture number should have changed (as it is a ratio of hole size to focal length). Brain aches, and reached a philosophical dead end on this one due to lack of knowledge. Any help much appreciated as it may well swing the balance between whether or not I go digital now or wait for the next (cheaper) batch of digi SLRs (with their perhaps massive depth of field at f22???). Ta Giles Stokoe photographer/photojournalist. See some images at http://www.stokoe.co.uk =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
