Archived posting to the Leica Users Group, 2009/12/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Bob, The only red/blue shift I knew of was those due to the Doppler Effect, which can hardly be the case here. So I did some digging. Could it be this effect - look under "Intensity", right at the end, the Purkine Shift- and both Thom Hogan and Michael Reichmann are talking about Landscape Photography: http://www.luminous-landscape.com/tutorials/colour_theory.shtml Cheers Jayanand On Sat, Dec 19, 2009 at 9:00 PM, Bob Adler <rgacpa at yahoo.com> wrote: > Does that mean they show separation in the histogram; i.e., when you look > at the histogram, the blue pixels show up in a different part of the X axis > than the red? > Bob Adler > Palo Alto, CA > http://www.rgaphoto.com > > > > > ________________________________ > From: Jayanand Govindaraj <jayanand at gmail.com> > To: Leica Users Group <lug at leica-users.org> > Sent: Sat, December 19, 2009 5:19:08 AM > Subject: Re: [Leica] M9 Internal IR-Cut filter make the camera fragile to > use? > > Thom Hogan says that the 18mm and 21mm show colour shift: > > *Leica*: quite a refreshing story, actually. They listened to M8 customers. > They looked for exploitable niches. They partnered with other companies > (Kodak and Adobe, for example) to provide things that they couldn't do on > their own (sound a bit like ASML in the *Economist* story?). I'll bet that > they can't build enough M9, X1, or S2 cameras to meet demand in 2010. They > still have issues they need to correct, though. Too many M mount lenses > still provoke red/blue shifts across the frame due to the thickness of the > infrared block filter. That keeps too many people from stepping over to the > M9, I think. For example, I might consider an M9 with an 18mm or 21mm lens > for landscapes, especially those I have to do long hikes to. But these > lenses absolutely seem to provoke the side-to-side color issues, so my > interest is immediately weakened. > > See the whole article at: > > http://www.bythom.com/2010predictions.htm > > Cheers > Jayanand > > > > On Sat, Dec 19, 2009 at 4:16 PM, Frank Dernie > <Frank.Dernie at btinternet.com>wrote: > > > My WATE works fine on the M9. I always assume a lens with an exit pupil > > extremely close to the sensor will be too extreme to be compensated, so > the > > 15mm CV almost certainly won't work, though I took a few shots with my > 12mm > > and it seems not bad, I preferred uncorrected. Depending on the subject > the > > shortcomings may not be noticed at all. It was pretty obvious that the > Zeiss > > 21mm f4.5 would be unsuitable for digital, thank goodness they have > > eventually said so, I think it is pretty unfair for Zeiss and CV to sell > > customers lenses suitable for film not digital and not make it clear on > the > > packaging. > > Frank > > > > On 19 Dec, 2009, at 03:50, Geoff Hopkinson wrote: > > > > > OK then Dante. That would be a problem with those Cosina Voigtlander > > lenses > > > then, not Leica ;-) No worries. > > > I'd also seen a comment from PopFlash that Zeiss are not recommending > > their > > > ZM 4.5 21 on the M9 (but all other ZM lenses OK). I understand that the > > > latest free Cornerfix works well with that one (as it does with the > > > asymmetric overcorrection that has been reported with some samples of > the > > > Elmar 18. I read that Leica engineers have seen the testing and samples > > > reported on that. Perhaps it will be addressed in the next firmware > > release. > > > > > > I sold my ZM 18 (and that 21) a while back so I can't comment from > > > experience on those. I'm happy with 24 as my widest now on the M9 > (which > > is > > > why I had the 18 for my M8). > > > > > > > > > 2009/12/19 Dante Stella <dstella1 at ameritech.net> > > > > > >> The 12mm and 15mm lenses are the ones causing consternation. > > >> > > >> Dante > > >> > > >> On Dec 18, 2009, at 5:42 PM, Geoff Hopkinson wrote: > > >> > > >>> Mine works fine including with my 24 and 28 wide open. The biggest > > >> problem > > >>> that people are reporting is simply that there aren't enough to go > > around > > >>> for all of the orders so far. > > >>> On the cover glass problem, there are six reports currently (from the > > >>> thousands of cameras delivered thus far), which is six too many of > > >> course. > > >>> Too early for the cause or causes to be determined. One camera was > > >> replaced > > >>> on the spot by the dealer (lucky customer that the dealer had > another) > > >> and > > >>> one that was returned to Solms was repaired in 2 days. I hope the > other > > 4 > > >>> customers can soon report similar rapid resolutions. > > >>> > > >>> 2009/12/19 Dante Stella <dstella1 at ameritech.net> > > >>> > > >>>> Bear in mind that replacing the sensor glass on an M8 requires a > > >>>> board-level replacement ($1,800) - so if this situation occurs with > > the > > >> M9, > > >>>> and you don't catch it in-warranty, you could be in for a world of > > hurt. > > >> I > > >>>> don't think Leica changed any of its procurement practices. I > suspect > > >> that > > >>>> it simply lacks the clean room necessary to replace the glass to > Leica > > >>>> cleanliness standards and can pass the massive cost of what should > be > > a > > >> $300 > > >>>> repair to the end user. > > >>>> > > >>>> Oh yeah... M9, perfect the day it was released, no teething > problems, > > >>>> investment for the ages, etc. So we have red shifting, complaints > > about > > >>>> wide-angle lenses, complaints about incomplete IR blocking, and now > > >> broken > > >>>> cover glasses. Every manufacturer of everything has problems early > in > > >> the > > >>>> production run. It's unrealistic to expect that a digital camera > > pushed > > >> out > > >>>> the door in 18 months would be any different. > > >>>> > > >>>> And as my father said, "every car looks like a classic the year it > > comes > > >>>> out." > > >>>> > > >>>> Dante > > >>>> > > >>>> ____________ > > >>>> Dante Stella > > >>>> http://www.dantestella.com > > >>>> > > >>>> NO ARCHIVE > > >>>> > > >> -- > > >> Cheers > > >> Geoff > > >> http://www.pbase.com/hoppyman > > >> > > > > > > _______________________________________________ > > > 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 > > > > _______________________________________________ > 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 >