Topher Posted January 7, 2007 Share #1 Â Posted January 7, 2007 Advertisement (gone after registration) I just got my M8 (finally) and my pictures do not seem to have any overall colour cast, but all the blowout parts (specular highlights for instance) have this kind of psychodelic hot pink outline around them. Is this something to be concerned about? or is it just one side-effect of the magenta cast issue? Â I have no hot filters at the moment, and have not loaded C1 yet, so i'm processing the raw images in lightroom. I can't get the DNRs to open in AC2 or photoshop.... so this is my only path open at the moment.... Â Thanks for any support! I enjoy taking pics with it and don't want to send it away....... Link to post Share on other sites More sharing options...
Advertisement Posted January 7, 2007 Posted January 7, 2007 Hi Topher, Take a look here New M8: magenta highlights=magenta cast??. I'm sure you'll find what you were looking for!
andybarton Posted January 7, 2007 Share #2 Â Posted January 7, 2007 Welcome to the forum Topher! Â You need to download the Adobe Camera Raw software in order for Photoshop to be able to work with the DNG files. (You will also need a fairly recent version of Photoshop too) Link to post Share on other sites More sharing options...
jaapv Posted January 7, 2007 Share #3 Â Posted January 7, 2007 All digital camera's exhibit socalled "sensor blooming" to some degree in high contrast specular highlights. Actually the M8 is one of the less affected ones. Also unfiltered IR light can create a kind of ouf of focus halo around a highlight, easily corrected with an IR cut filter. Link to post Share on other sites More sharing options...
Topher Posted January 7, 2007 Author Share #4  Posted January 7, 2007 thought i'd add an example.  i don't think it is chromatic fringing, the colour is in all directions.  this is a 100% crop, from about 2/3rd out from center.  just want to know if it is normal! if not, i'll send it in. if it is normal for M8s, i'll learn to deal with it!  thanks again for all the help...... 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/12946-new-m8-magenta-highlightsmagenta-cast/?do=findComment&comment=136016'>More sharing options...
andybarton Posted January 7, 2007 Share #5 Â Posted January 7, 2007 Can you post the whole frame (suitably reduced in size, of course) too, please? Â This section looks over-exposed to me, which will not be helping matters. Link to post Share on other sites More sharing options...
sdai Posted January 7, 2007 Share #6 Â Posted January 7, 2007 That looks like CA to me. What lens were you using? ... have you tried to the color aberration correction tool in Camera Raw? Link to post Share on other sites More sharing options...
Topher Posted January 7, 2007 Author Share #7  Posted January 7, 2007 Advertisement (gone after registration) here's the whole test pic. this one is better exposed, but the hot pink bits are still there, just darker pink! maybe it is just infrared contamination.  i also remembered these first batch of pics were taken with a cosina/voigtlander lens (the 40 1.4) which is only single-coated. could that be making it worse??  tomorrow i'll go out and shoot some with a geniune leica lens, see if it's better. if i take the same pic and it's much better, at least people will know not to use single coated lenses with the m8!  thanks again folks 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/12946-new-m8-magenta-highlightsmagenta-cast/?do=findComment&comment=136044'>More sharing options...
sdai Posted January 7, 2007 Share #8 Â Posted January 7, 2007 The 40/1.4 SC was specifically designed for B/W film photography ... the lack of multi-coating is very likely the cause of the issues here. I'd suggest you try to correct it with Camera Raw. Link to post Share on other sites More sharing options...
khanosu Posted January 7, 2007 Share #9  Posted January 7, 2007 Hi Topher,  This is most probably sensor blooming that can happen anywhere in the frame (not just near the edges) and is cause by excesses electrons due to overexposure to spill into adjacent sites. It happens around badly overexposed parts of a picture. It is a digital problem and not connected to lenses. Please have a look at this thread that discussed this topic.  http://www.leica-camera-user.com/digital-forum/12536-red-edge-photo.html  Specifically look for Andy Piper’s excellent post #16  Also see post #3 that shows an example of sensor blooming. Unfortunately strong cases of blooming are not as easy to fix as CA artifacts; one has to make selections in Photoshop and de-saturate the offending color.  Furrukh Link to post Share on other sites More sharing options...
Jamie Roberts Posted January 7, 2007 Share #10 Â Posted January 7, 2007 I personally don't think that's the sensor at all, and I wouldn't test this with a CV lens pushed that hard... Â Because it really does look like the lens to me...reacting with the sensor, perhaps. I see similar effects all the time on the Canon 5D / 1ds2 with the 50 1.4 or 85 1.2L wide open, but I don't see anything like that with Leica lenses on any camera, including the Canons, let alone the M8 . Link to post Share on other sites More sharing options...
woodyspedden Posted January 7, 2007 Share #11 Â Posted January 7, 2007 I personally don't think that's the sensor at all, and I wouldn't test this with a CV lens pushed that hard... Â Because it really does look like the lens to me...reacting with the sensor, perhaps. I see similar effects all the time on the Canon 5D / 1ds2 with the 50 1.4 or 85 1.2L wide open, but I don't see anything like that with Leica lenses on any camera, including the Canons, let alone the M8 . Â I was recently testing an Olympus 28 2.0 using the 1DsMkII. For comparison I used the R28 Elmarit whose characteristics I know and love. I had some overexposed highlights on the object i was shooting with both the Elmarit and the Oly that resulted in intense purple fringing.. I put the Elmarit back on the DMR, and shot the object at the same exposure as the 1Ds. Absolutely no fringing. So at least in this case it was truly sensor bloom as the Elmarit has little to no CA. I suspect that is what is being seen here. Â Woody Spedden Link to post Share on other sites More sharing options...
reprobit Posted January 7, 2007 Share #12 Â Posted January 7, 2007 You need perfect lenses for digital photography...take a good apo lens and do not overexpose. Â Bernd Link to post Share on other sites More sharing options...
mike prevette Posted January 7, 2007 Share #13 Â Posted January 7, 2007 I can tell you this isn't the lens. I have that very same lens and Have seen blooming like this in all my lenses when you overexpose on an object that is also highly IR reflective. The combination of the visible light over exposure and the intense IR sensitivity of the M8 cause a gross overexposure on the chip, hence the "electron bleed" that causes sensor blooming. This will go away with controlled exposure and the use of an IR filter. Â If this were CA it would be offset to one side and it would effect the entire frame. Â _mike Link to post Share on other sites More sharing options...
MarkM6 Posted January 7, 2007 Share #14 Â Posted January 7, 2007 You need perfect lenses for digital photography...take a good apo lens and do not overexpose. Â Wow, you said it as a matter-of-factly. It is scary how a Leica fan thinks! Link to post Share on other sites More sharing options...
sligoker Posted January 8, 2007 Share #15 Â Posted January 8, 2007 Your analysis is spot on---This is all about the intense IR sensitivity of the M----absolutlely nothing to do with CA> Link to post Share on other sites More sharing options...
roberth Posted January 8, 2007 Share #16 Â Posted January 8, 2007 LOL guys. It's the sensor, it's the lens, it's the IR. That's three sides to this coin so far, any more? How many jelly beans in the jar? Sorry guys, I am not going to offer an opinion because I do not know. As an engineer I would say start trying things out and eliminate things it maybe. Use another lens on the same shot, use an IR filter on the same shot, use another camera (RD-1) on the same shot with the original lens. At some stage the effect will not be present and you will have your answer. it's not a guessing game. Link to post Share on other sites More sharing options...
reprobit Posted January 8, 2007 Share #17  Posted January 8, 2007 after you took a good lens and avoided overexposing, you will see if you still find this glow in you images  if yes .... the next step follows   bernd  step by step :-) Link to post Share on other sites More sharing options...
Peter Branch Posted January 8, 2007 Share #18 Â Posted January 8, 2007 All of us using the M8 withour IR filtering, (when will they come?), have exactly the same problem regardless of the lens. It's the IR sensitivity problem. Nearly all foliage strongly reflects IR and virtually every picture I take which includes foliage has this problem to some degree somewhere in the image. As the car salespersons say - "It's a feature of this model, Sir". Link to post Share on other sites More sharing options...
khanosu Posted January 8, 2007 Share #19 Â Posted January 8, 2007 LOL guys. It's the sensor, it's the lens, it's the IR. That's three sides to this coin so far, any more? How many jelly beans in the jar? Â Hi Robert, Â There are only two sides of the coin being discussed here. Either it is lens induced CA or it is sensor bloom. The IR sensitivity simply helps the sensor to bloom easier since the additional IR light helps in blowing out the highlights. Considering the position of the effect on the frame, and the way it is occurring surrounding strong highlights the engineering hypothesis based on past similar data is that it is sensor bloom helped in its onset by IR sensitivity of the sensor. Â Furrukh Link to post Share on other sites More sharing options...
Iron Flatline Posted January 8, 2007 Share #20 Â Posted January 8, 2007 I'm having a "red" issue as well. Â The image below is just the DNG resized and saved as JPG. It looks the same whether I use Adobe Raw or Capture One. Â Note the red blotchiness of the skin, and the hands especially. My wife spends more on skin care per month than I do on Leica gear in a year , so I can guarantee you that's not what her skin looks like. Â Â Other images are showing a lot of red, too. Â I have a lot of experience with digital photography. I've not seen this before. To add to the speculation - might the white balance be skewing? Â My firmware is 1.09 Link to post Share on other sites More sharing options...
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