Archived posting to the Leica Users Group, 2007/08/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Even more interesting (and I may be way off here), I think the issue is the internal reflection of MOSTLY IR light rays. That would explain the increased prominence and purplish look to the 'flaws' when the IR filter is removed. Eric On 8/26/07, Eric Korenman <faneuil@gmail.com> wrote: > > thanks for the opinion. > The shots with IR filter freaked me out at first - they look so sharp and > like 'sensor ghosts'. > The shots without the IR filter convinced me that it was not a sensor > issue. > > Eric > > On 8/26/07, Fred Hess / Phenix Visuals NL <fredhess@phenix-visuals.nl> > wrote: > > > > Hello Eric, > > > > Those reflections seem to me as internal reflections in the Nocti > > itself. > > > > Often you see this kind of reflections in 16- or 35mm film lenses too. > > Even with Zeiss Primes for Arriflex-camera's!! > > > > So, no sensor-based 'problem' to my opinion. > > > > Kind regards Fred Hess. > > > > ----- Original Message ----- > > From: "Eric Korenman" <faneuil@gmail.com > > > To: "LUG" <lug@leica-users.org> > > Sent: Sunday, August 26, 2007 1:40 PM > > Subject: [Leica] Noctilux M8 - Internal reflections or sensor problem? > > IMG > > > > > > > These test shots reproduce a problem I had while shooting Noctilux and > > M8 > > at > > > night by light of tiki torches. > > > > > > I set up candles in my kitchen and shot 2 images. > > > First is with an IR filter. > > > Second is without. > > > Noctilux is wide open for both shots. > > > www.korenman.com/candles > > > > > > Note how the repeated images in the lower right change. > > > I think this is all internal reflection issues and not a sensor > > problem. > > > Leica claims that green images with the IR filter are due to internal > > > reflections between the lens and filter. > > > > > > Anybody had a similar experience? > > > > > > Eric > > > > > > _______________________________________________ > > > 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 > > > >