robsteve Posted November 15, 2006 Share #61 Posted November 15, 2006 Advertisement (gone after registration) The best way to correct the color is with a radial color correction algorithm. . Joseph: Did you see my post about the DMR and its correction for ROM lenses? The DMR seems to use a radial color correction with ROM lenses. http://www.leica-camera-user.com/digital-forum/9457-why-coded-lenses-ir.html just reposted this with the link to the thread. Link to post Share on other sites More sharing options...
Advertisement Posted November 15, 2006 Posted November 15, 2006 Hi robsteve, Take a look here What is the problem with IR filters?. I'm sure you'll find what you were looking for!
Joseph S. Wisniewski Posted November 15, 2006 Share #62 Posted November 15, 2006 Hi Bob, would you have one pix or two showing that look on your R-D1 body?Just curious. Would you settle for a shot on a Nikon body? I picked an angle where it had a nice glow Those knives were already on the counter, I just moved them a little to add some interest to the shot. The interaction of well crafted items: German knives, Japanese camera, German filters. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/9270-what-is-the-problem-with-ir-filters/?do=findComment&comment=94714'>More sharing options...
Joseph S. Wisniewski Posted November 15, 2006 Share #63 Posted November 15, 2006 Joseph: Did you see my post about the DMR and its correction for ROM lenses? The DMR seems to use a radial color correction with ROM lenses. http://www.leica-camera-user.com/digital-forum/9457-why-coded-lenses-ir.html just reposted this with the link to the thread. That's very interesting. Thank you for sharing it. I wonder if the camera is applying the correction to the DNG file, or if it's putting the color correction parameters into the DNG and the raw processor is picking up on them and doing the right thing... I am surprised the Modul-R had such a cyan corner problem due to its internal filter. Being a DSLR, it shouldn't be dealing with large angles, and a dichroic filter should be very well behaved. Link to post Share on other sites More sharing options...
robsteve Posted November 15, 2006 Share #64 Posted November 15, 2006 That's very interesting. Thank you for sharing it. I wonder if the camera is applying the correction to the DNG file, or if it's putting the color correction parameters into the DNG and the raw processor is picking up on them and doing the right thing... I am surprised the Modul-R had such a cyan corner problem due to its internal filter. Being a DSLR, it shouldn't be dealing with large angles, and a dichroic filter should be very well behaved. I think it is doing it before writing the DNG or Jpeg. The preview on the DMR screen also shows the correction. The Leica 19mm sticks into the mirror box quite a bit. This is the one that hangs an EOS 1D mirror. Link to post Share on other sites More sharing options...
jrc Posted November 15, 2006 Share #65 Posted November 15, 2006 If the filters are going to be the answer, I think it should be one special price filter for each coded lens, or a couple of free filters plus special price filters (at Leica cost) for however many a registered M8 owner needs, in whatever sizes. I have seven new, modern lenses that need filters. I would be unhappy if Leica gave me two, and then charged full freight for the other five, plus $110 each, or whatever it is, for coding. For me, that would mean the price of the M is actually closer to $6500; that's a 30% hidden increase, because the filters are, essentially, required gear (so is the coding, if that's the only thing that will solve the cyan issue.) I agree that the M8 is a great camera, but Leica messed up this launch, and if they have to sell a bunch of filters for their cost, then that's what they should do. They shouldn't be able to screw up and then try to make a profit from of it. B+W cut filters sell for ~$110. If half of that is the retailers profit, and 25% is Leica's profit, I think offering lenses for ~$35 would be fair. And I think they should be Leica-branded, and Leica (B+W) quality. JC Link to post Share on other sites More sharing options...
lct Posted November 15, 2006 Share #66 Posted November 15, 2006 Would you settle for a shot on a Nikon body?... Thank you Joseph. Hard to believe that one should use those pink things as a mandatory solution. Link to post Share on other sites More sharing options...
markedavison Posted November 15, 2006 Share #67 Posted November 15, 2006 Advertisement (gone after registration) Here is an example of the vignetting with the 24, induced by using a hot mirror filter. I'm sorry it's not a supremely dramatic example. You may have to use photoshop's info tool to see the color shift, but it is there. Mark Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/9270-what-is-the-problem-with-ir-filters/?do=findComment&comment=94832'>More sharing options...
gravastar Posted November 15, 2006 Share #68 Posted November 15, 2006 Hi Bob, would you have one pix or two showing that look on your R-D1 body?Just curious. Here is a filter mounted on a lens and another one on a sheet of white card. You can see how the off axis reflected light is magenta and the off axis transmitted light is green. Viewed normal (straight on) the filters appear colorless. This also shows why adding such a filter to the sensor coverglass could give problems with magenta flare due to reflections. Bob. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/9270-what-is-the-problem-with-ir-filters/?do=findComment&comment=94841'>More sharing options...
lct Posted November 15, 2006 Share #69 Posted November 15, 2006 Here is a filter mounted on a lens and another one on a sheet of white card...Viewed normal (straight on) the filters appear colorless Thank you Bob. Do you mean if you shoot me with it i'll see the filter as transparent? Link to post Share on other sites More sharing options...
gravastar Posted November 15, 2006 Share #70 Posted November 15, 2006 Thank you Bob.Do you mean if you shoot me with it i'll see the filter as transparent? Yes, it's only when viewed from the side that it becomes reflective to visible light. I've found by using the longest and narrowest possible lens hood you can prevent people from seeing such a strong reflection. In spite of this it can still look a bit unusual, there are slight reflections from the filter holder rim and lens that are tinged with magenta and green. Bob. Link to post Share on other sites More sharing options...
lct Posted November 15, 2006 Share #71 Posted November 15, 2006 ...I've found by using the longest and narrowest possible lens hood you can prevent people from seeing such a strong reflection... Thanks again Bob but i'm afraid it'll be hardly usable with small buit-in hoods like 'cron and 'lux 50 let alone the Elmar's... Link to post Share on other sites More sharing options...
gravastar Posted November 16, 2006 Share #72 Posted November 16, 2006 Thanks again Bob but i'm afraid it'll be hardly usable with small buit-in hoods like 'cron and 'lux 50 let alone the Elmar's... I'm not so sure about that. I'd suggest you obtain a filter and try. A lens hood does two things for you as far as the filter is concerned. It prevents objects off axis from being reflected (all you "see" is the reflection of the black inside of the hood) and it prevents the filter from being viewed from the side. Also you need a bright object to be reflected for the effect to become distracting. The example I showed was the worst possible case: no lens hood at all, the reflection of a bright white card and a fairly steep angle of view from the optical axis. For lenses that have built in hoods you can retract the hood and screw in another with a narrower angle of view, that's what I do with the R-D1 (B+W metal hoods are available in wide, normal and tele sizes. There's also a seller on eBay called heavystar who sells metal hoods.) You might want to use a different hood anyway because of the 1.3x factor of the M8. If you can't get one with the correct thread size you can use a step up ring to obtain a match. Bob. Link to post Share on other sites More sharing options...
blakley Posted November 16, 2006 Share #73 Posted November 16, 2006 I wanna know the story behind the dolphin.... Link to post Share on other sites More sharing options...
waterlenz Posted November 16, 2006 Share #74 Posted November 16, 2006 Actual. The new 28/2.8 released at about the same time as the M8 got a real workout in Sean Reid's wedding pictures, posted last night. scott Not according to the captions he posted on RR M8 part IV. He used the 28 Summicron for the shots posted there. Tom Link to post Share on other sites More sharing options...
lct Posted November 16, 2006 Share #75 Posted November 16, 2006 ...For lenses that have built in hoods you can retract the hood and screw in another with a narrower angle of view, that's what I do with the R-D1 (B+W metal hoods are available in wide, normal and tele sizes... So do I Bob but it's hardly the perfect solution for traveling light IMHO. Link to post Share on other sites More sharing options...
arne_s Posted November 16, 2006 Share #76 Posted November 16, 2006 I just called Foto Huppert about my order of B&W IR-Cutfilters. They (even B&W) can't ship the 39mm before December, probably next year. 60mm are not in stock, too, but will probably arrive earlier. But I will get my 55mm in the next days. Arne Link to post Share on other sites More sharing options...
robsteve Posted November 16, 2006 Share #77 Posted November 16, 2006 I just called Foto Huppert about my order of B&W IR-Cutfilters.They (even B&W) can't ship the 39mm before December, probably next year. 60mm are not in stock, too, but will probably arrive earlier. But I will get my 55mm in the next days. Arne Arne: If you have the Noctilux or summilux with removable hoods, it looks like a 62mm with 60-62 stepping ring will fit inside the hood. For lenses with sliding hoods, I think you are stuck waiting for a 60mm filter to be made. Link to post Share on other sites More sharing options...
andym911 Posted November 16, 2006 Share #78 Posted November 16, 2006 I just called Foto Huppert about my order of B&W IR-Cutfilters.They (even B&W) can't ship the 39mm before December, probably next year. 60mm are not in stock, too, but will probably arrive earlier. But I will get my 55mm in the next days. Arne Arne, you're right.I went there today (I live just a couple of kilometers away) and they said not to expect 39mm before the new year if all goes well. Picked up the 46mm however in prep for my camera that is coming soon. Andy p.s maybe I'll buy the whole stock and open a business..... Link to post Share on other sites More sharing options...
Joseph S. Wisniewski Posted November 25, 2006 Share #79 Posted November 25, 2006 Thank you Joseph.Hard to believe that one should use those pink things as a mandatory solution. As someone that suffered through using them on the Nikons, I agree. They really are attention getters. And one time, the attention they got came from security, who compared the color to a spotting scope. They didn't draw on me, but they sure treated me with more suspicion than is typical for photographers. I like your graphic. I did a filk to go with the filters. Hope it works, Leica shooters aren't know for a sense of humor. You know Elmar and Planar, And Elmarit and 'Cron. Tri-Elmar and Summar And 'Lux and Biogon. But do you recall The most infamous camera of all M8 the red-nosed camera, Had a filter on it's nose. And if you ever saw it, You would even say it glows. All of the other cameras, Used to laugh and call it names. They never let poor M8, Join in their street shooting games. Then one foggy Christmas eve, Santa came to say. M that sees with infrared, Won't you guide my flying sled. Then all the cameras loved him, As they shouted out with glee. M8 the red-nosed camera, You'll go down in his-to-ry! Link to post Share on other sites More sharing options...
Vivek Iyer Posted November 25, 2006 Share #80 Posted November 25, 2006 That is really funny, Joe (though it may not be appropriate for a Leica sponsored forum)! Link to post Share on other sites More sharing options...
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