Archived posting to the Leica Users Group, 2009/03/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Geoff, Maybe..., maybe.. This is an interesting case to study. As you know this is the Contax RF old Zeiss Jena Sonnar 2/8,5 cm, the glass is perfect, only some dust that it can not affect final quality. These pictures was shot on a cloudy day. I use it with an special adaptor that consist in the front focusing part of the old RF Contax adapted to Leica M mount, I've tried it on the M8 and no trace of this problem, on the M8 the only problem is a slight focus shift, I have sand the adapter to be adjusted a little bit more, on the M3 it was not a focus problem, I think this is as you say an internal reflection, probably a small light has entered due to the adjustment of the adapter. When the lens is correctly set it performs nicely, do you remember these se?oritas with this lens on the M8?: http://gallery.leica-users.org/v/luisrq/Barcelona/L1001206-1.jpg.html http://gallery.leica-users.org/v/luisrq/Barcelona/L1001206bw.jpg.html http://gallery.leica-users.org/v/luisrq/Barcelona/L1001206-2bw.jpg.html Maybe it is a lens that only work with nice se?oritas? Thank you Geoff! All the best! Lluis El 22/03/2009, a las 21:59, Geoff Hopkinson escribi?: > Lluis I can see the effect you mention in a couple of these. It is > odd. > I do not think it is due to missing lenshood as the light doesn't > look that > difficult. > I do not think it is a dirty lens as that would just reduce the > contrast > everywhere. > I see nothing that looks like a sensor error either. (streaks, > blobs, faulty > photosites) > My guess would be that it is an internal reflection in the lens for > some > reason. > Maybe you could shoot some test shots of a plain black area and see > if you > can detect a lighter grey area in the shot? > Please keep us informed if you find out the cause. > > > > 2009/3/22 Lluis Ripoll <luisripoll at telefonica.net> > >> I've tested the lens on the M3 with TX at 400 ISO, I was veru >> surprised to >> appreciate a certain flare on the center of the negative, aybe it >> was simply >> that lens was dirty, the lens has no signs of coating deterioration >> at all, >> maybe is a slight reflection of light due to the adaptor >> adjustement on the >> camera, the case is that the first picture could be in my opinion a >> good >> catch but I've can improve it, I would like know your opinions, >> thanks in >> advance. >> >> http://photo.net/photodb/photo?photo_id=8813763 >> >> http://photo.net/photodb/photo?photo_id=8813764 >> >> http://photo.net/photodb/photo?photo_id=8813762 >> >> http://photo.net/photodb/photo?photo_id=8813761 >> >> http://photo.net/photodb/photo?photo_id=8813760 >> >> Thanks for looking and your comments, >> >> Saludos cordiales >> Lluis >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > > -- > Cheers > Geoff > 'Life's too short for mediocre glass' > http://gallery.leica-users.org/v/gh/a/ > http://www.pbase.com/hoppyman > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information