If it is the sensor that cause the ghosting, it should not show in the viewfinder. Conventional ghosting between filters and lens shows.
I'm not sure about ghosting between internal elements, but I assume that too should show up in the viewfinder. Cheers, Jostein Quoting Anthony Farr <[EMAIL PROTECTED]>: > D'oh, forgot about the cover glass. > > You still need a concave surface to produce a focused image from a flat > reflection. Conventional ghosting that has arisen throughout the history of > photography is still the prime suspect IMO. Keep in mind that figure of 8cm > or so, which is a very long way to expect a plain reflection off the focal > plane to remain coherent. > > Arnie could always reproduce the conditions and take consecutive shots with > the same lens on his *istD and a film body, that could be more illustrative > than PDML conjecturing. > > regards, > Anthony Farr > > ----- Original Message ----- > From: "Jostein" <[EMAIL PROTECTED]> > > > Quoting Anthony Farr <[EMAIL PROTECTED]>: > > > Some film emulsions are quite shiny yet ghosting off the film hasn't > been > > > observed AFAIK. However a CCD as in the *istD is surfaced with tiny > > > lenslets and is unlikely to act as a mirror. While I haven't seen one > with > > > my own eyes, photos of sensors I have seen show a satiny sheen rather > than a > > > mirrorlike glaze, and are unlikely to support a coherent reflection over > the > > > approximately 8cm from themselves to rear element and back again. > > > > I remember well the findings of Mark Cassino on film reflectivity. > > The CCD microlenses will of course not act as a mirror, but the flat piece > of > > SMC glass protecting the CCD from dust may. > > > > I don't know if the orientation is a tell-tale sign of sensor > reflectivity, but > > I don't think we can rule it out. > > > > Cheers, Jostein > > > > ---------------------------------------------------------------- > > This message was sent using IMP, the Internet Messaging Program. > > > > > > > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
