atufte Posted November 8, 2007 Share #1 Posted November 8, 2007 Advertisement (gone after registration) I believe i get significantly less cyan vignetting after the new firmware upgrade, this shot is with the Zeiss Distagon 18, Leica UV/IR and no coding and no cornerfix, ok it's still there but not at all as bad as it was....sorry i can't provide before and after fw images... Sorry for boring test shot/subject :-) 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/37577-better-vignetting-control-in-new-fw/?do=findComment&comment=396955'>More sharing options...
Advertisement Posted November 8, 2007 Posted November 8, 2007 Hi atufte, Take a look here Better vignetting control in new fw.... I'm sure you'll find what you were looking for!
scott kirkpatrick Posted November 8, 2007 Share #2 Posted November 8, 2007 With no coding, the lens would not be recognized, and no vignetting correction should be applied, even if you did set lens detection ON+UV/IR. Also, Leica did not list improving the vignetting correction as one of the improvements in 1.11, so my suspicion is that this part of the firmware was left unchanged (so it didn't have to be tested as carefully before release). Probably we'll see improvements in multiple output functions when they are ready to release the new AWB code, since then they will be working on that side of the data flow in the camera, and will have to test everything that is done after the exposure. But not yet. scott Link to post Share on other sites More sharing options...
atufte Posted November 8, 2007 Author Share #3 Posted November 8, 2007 With no coding, the lens would not be recognized, and no vignetting correction should be applied, even if you did set lens detection ON+UV/IR. Also, Leica did not list improving the vignetting correction as one of the improvements in 1.11, so my suspicion is that this part of the firmware was left unchanged (so it didn't have to be tested as carefully before release). Probably we'll see improvements in multiple output functions when they are ready to release the new AWB code, since then they will be working on that side of the data flow in the camera, and will have to test everything that is done after the exposure. But not yet. scott I thought so aswell, but i'm sure i get less cyan drift/vignetting after fw update, both on my Distagon 18 and Biogon 35 - which now show's no sign of vignetting/drift what so ever, and it shure did before this upgrade... Anyway im happy as a dog with this... :-) Link to post Share on other sites More sharing options...
guywalder Posted November 8, 2007 Share #4 Posted November 8, 2007 With no coding, the lens would not be recognized, and no vignetting correction should be applied, even if you did set lens detection ON+UV/IR. Also, Leica did not list improving the vignetting correction as one of the improvements in 1.11, so my suspicion is that this part of the firmware was left unchanged (so it didn't have to be tested as carefully before release). scott Scott, with FW 1.107 I see a global shift in colour temp between ON+UV/IR and OFF (using preset 'sunny'), different to vignetting correction I realise, but it helps the corners look better, I guess it makes centre frame too magenta, but I havnt ever noticed... Without lens recognition, surely any reduction in magenta corners with a wide angle will also produce magenta corners when using longer lenses? Link to post Share on other sites More sharing options...
bradreiman Posted November 8, 2007 Share #5 Posted November 8, 2007 lenses over 35mm do not show cyan corners with ir filter and no coding. the vignetting is due to the angle of rays reaching edge of the sensor and for lenses narrower than 35mm the angle of the light is reduced....b Link to post Share on other sites More sharing options...
guywalder Posted November 8, 2007 Share #6 Posted November 8, 2007 without lens recognition, i.e. the camera does not know what lens is fitted, so if that lens happens to be a wide angle but the corners are not cyan, then magenta is being added somehow, that being the case, Without Lens Recognition and a lenger lens fitted, if magenta is being added the result will be magenta corners. The key is 'without lens recognition', which is why i put it at the start of the sentance. Then I put a question mark at the end of the sentance as I dont believe that is whats happening anyway, like I dont think the new FW has changed the point at which the meter reading is locked, or that high iso noise is better etc etc Link to post Share on other sites More sharing options...
bradreiman Posted November 8, 2007 Share #7 Posted November 8, 2007 Advertisement (gone after registration) sorry i wasn't clear. i understood your question. the results are the same narrower than 35mm with lens recognition on or off. the angle of the rays are less obliique and do not cause cyan vignetting (actually red vignetting) in either case...b Link to post Share on other sites More sharing options...
Guest tummydoc Posted November 8, 2007 Share #8 Posted November 8, 2007 Sounds like Leica's computer geeks must have discovered how to programme placebo effect Link to post Share on other sites More sharing options...
Jamie Roberts Posted November 8, 2007 Share #9 Posted November 8, 2007 Sounds like Leica's computer geeks must have discovered how to programme placebo effect LOL!!! Except you gotta admit, Vinay, the top shot doesn't look anything like most 18 / 15mm shots I've seen. They're usually much more cyan than that. Alexander--did you process these as normal? Link to post Share on other sites More sharing options...
Speenth Posted November 8, 2007 Share #10 Posted November 8, 2007 LOL!!! Except you gotta admit, Vinay, the top shot doesn't look anything like most 18 / 15mm shots I've seen. They're usually much more cyan than that. Alexander--did you process these as normal? This is just the crap AWB strutting its stuff - on this occasion its so wildly out it got the image just right! It has to happen at least once in a million shots .... Link to post Share on other sites More sharing options...
Jamie Roberts Posted November 8, 2007 Share #11 Posted November 8, 2007 This is just the crap AWB strutting its stuff - on this occasion its so wildly out it got the image just right! It has to happen at least once in a million shots .... ...and hence my question about processing Pretty funny response, though! Link to post Share on other sites More sharing options...
sandymc Posted November 8, 2007 Share #12 Posted November 8, 2007 The other thing here to watch out for - and this jumped right off the page when I looked at the image - is florescent lighting. Because they're line spectrum devices, depending on the specific manufacturer/type, cyan drift varies wildly...... Sandy Link to post Share on other sites More sharing options...
atufte Posted November 8, 2007 Author Share #13 Posted November 8, 2007 LOL!!! Except you gotta admit, Vinay, the top shot doesn't look anything like most 18 / 15mm shots I've seen. They're usually much more cyan than that. Alexander--did you process these as normal? Yes straight forward conversion in ACR, and to the "Leica bad AWB freaks", this was shot with manual WB (grey card), so this is NOT the reason why this shot turned out like it did... I did a couple more test shots today to see if this was consistent or not, and im happy to say YES it is, i will post some more examples later tonight... Link to post Share on other sites More sharing options...
atufte Posted November 8, 2007 Author Share #14 Posted November 8, 2007 Here's another Zeiss 18 shot this time @ f/4 (the other one f/8) this time also AWB, handheld iso 640 (again sorry for the boring images :-) I think this one shows what im talking about even better... (Not much either cyan drift nor magenta vignetting...) 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/37577-better-vignetting-control-in-new-fw/?do=findComment&comment=397416'>More sharing options...
atufte Posted November 8, 2007 Author Share #15 Posted November 8, 2007 Here's an example of the same lens/camera/filter with the previous firmware, the difference is HUGE.... 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/37577-better-vignetting-control-in-new-fw/?do=findComment&comment=397427'>More sharing options...
Jack_Flesher Posted November 8, 2007 Share #16 Posted November 8, 2007 Here's an example of the same lens/camera/filter with the previous firmware, the difference is HUGE.... It looks too good to be true, which is why you're getting all the skepticism If possible for you to do, I'd like to a similar shot to the one above, in similar lighting with the same lens and filter, but with the new firmware... Link to post Share on other sites More sharing options...
atufte Posted November 9, 2007 Author Share #17 Posted November 9, 2007 It looks too good to be true, which is why you're getting all the skepticism If possible for you to do, I'd like to a similar shot to the one above, in similar lighting with the same lens and filter, but with the new firmware... Hehe, this is so funny, because why on earth would i "make this up"...? I will try to take the similar shot on request, but have to wait until tonight because it's broad daylight right now... :-) Link to post Share on other sites More sharing options...
peterv Posted November 9, 2007 Share #18 Posted November 9, 2007 Hi Alexander, first let me say you're a very lucky guy! This lens looks really very nice, and it's hard to find at the moment, at least in the Netherlands, that is... Anyway, I think Sandy has a good point. When I first saw your wonderful picture on the top of this thread, I too figured the absence of cyan vignetting was due to the line spectrum of the fluorescent fixtures. The second shot is also, though maybe not the same characteristic, fluorescent light. Did you do test shots in continuous light, e.g. daylight or tungsten? I'm very curious, keep the examples coming Cheers. Peter Link to post Share on other sites More sharing options...
atufte Posted November 9, 2007 Author Share #19 Posted November 9, 2007 Hi Alexander, first let me say you're a very lucky guy! This lens looks really very nice, and it's hard to find at the moment, at least in the Netherlands, that is... Anyway, I think Sandy has a good point. When I first saw your wonderful picture on the top of this thread, I too figured the absence of cyan vignetting was due to the line spectrum of the fluorescent fixtures. The second shot is also, though maybe not the same characteristic, fluorescent light. Did you do test shots in continuous light, e.g. daylight or tungsten? I'm very curious, keep the examples coming Cheers. Peter Here it is,took a testshot right now and ok i see more cyan drift/magenta in this daylight shot, so you were probably right about this, but it's still MUCH better than with this lens before the FW upgrade, dont now why, but it's great :-) 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/37577-better-vignetting-control-in-new-fw/?do=findComment&comment=397842'>More sharing options...
scott kirkpatrick Posted November 9, 2007 Share #20 Posted November 9, 2007 It's nice that your pictures look better after installing the new firmware, but I am pretty sure that this is just a result of comparing a successful shot after with an less successful shot before, each taken under different conditions. And without adequate documentation to compare things. I'm skeptical to start with because Leica doesn't seem to have touched this part of their code -- the WATE focal length selection dialog is unchanged, and there is still little communication between the ON and ON+UV/IR modes of in camera post processing. If you want to contribute to getting the M8 firmware to really do the best possible job of correcting for the tricky parts of wide angle imaging, please give all the relevant information. I don't see, for example, from your notes -- are you shooting in RAW (and if so, how did you develop, what color balance corrections, if any, did you apply, and what other settings were used to make the JPG) or did you shoot JPG, and if so with what in camera settings? -- what lens detection setting did you use? Sean Reid has a good methodology for shooting white walls and comparing center and corner colors. He uses 3500K lights and balances them on a white card to get reproduceable lighting, then click balances in C1 3.7.7 (so far, maybe he will switch to the 4.0 beta soon) and then compares the rgb levels found at the exact center of his "white wall" to the values seen at the corner of the frame. I just finished doing that with my dining room wall in indirect daylight, and will shoot again tonight in incandescent. I used a CV21/4 (uncoded) and found no difference between the result with lens detection OFF and with it ON, as expected. Then I shot with a CV15/4.5 coded with a JLM-mount to be a WATE, and told the camera that this WATE is set at 16mm focal length. I'l post the rest of the results tonight. scott Link to post Share on other sites More sharing options...
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