Archived posting to the Leica Users Group, 2005/06/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Nope. The depth of field is indeed independent of the crop - it's the same as the "real" focal length of the lens. But that means that when you shoot with a 35 mm lens with a 1.5 crop factor, you are getting an image that looks like you shot it with a 52 mm lens, but with the depth of field of a 35. So your 50 1.4 becomes a 75 1.4, but with the depth of field of a 50 1.4 - which actually is probably an advantage in that case. :-) On 6/25/05 1:01 PM, "Adam Bridge" <abridge@gmail.com> wrote: > Wait a minute now. For a given lens the DOF is independent of the > cropping factor of the sensor, right? So if you use existing M lenses > on a digital M with an APS or somesuch chip then the depth of field > will be the same for a given f-stop but the crop factor will still be > in play. > > Isn't this right? > > I admit that Erwin's article didn't make a whole lot of sense to me. > I read it once last night and after my mind tried wriggling around all > of it . . . I was confused. Maybe it'll make more sense in the light > of day. But some of the things he was saying didn't seem to match > experience very well. > > Oh well . . . light is particles. I'll stick with that. > > Adam > > On 6/25/05, feli <feli2@earthlink.net> wrote: >> >> On Jun 25, 2005, at 6:56 AM, Scott McLoughlin wrote: >> >>>> >>>> I, as an R-D1 user, simply agree to an opinion that digital M >>>> mount cameras should not necessarily be with full size sensors. I >>>> will happily use M lenses designed specifically for the APS size, >>>> if it is chosen as the standard. >> >> The only thing that bothers me about a sub full frame size chip is >> that it will be difficult to >> achieve the super shallow DOF you can get right now, when shooting >> wide open and close up. >> >> If i remember correctly a half size sensor, doesn't mean twice the >> DOF at the same stop, because >> it isn't a linear progression. I would be curious to know how big the >> difference really is... >> >> feli >> >> ________________________________________________________ >> feli2@earthlink.net 2 + 2 = 4 >> www.elanphotos.com >> >> >> no archive >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information