marknorton Posted November 11, 2006 Share #61 Posted November 11, 2006 Advertisement (gone after registration) Actually, Leica uses a jig that is bolted to the floor. The camera is clamped to it and looks at a chart, what, about 10 m away. I think there is a steel plug that is folded up against the front bayonet that duplicates the 10 m distance. (That's my remembrance. Very simple and direct but very exact mechanism; and more accurate than a visual infinity check.) HC, bit difficult to sell as an accessory then! Link to post Share on other sites More sharing options...
Advertisement Posted November 11, 2006 Posted November 11, 2006 Hi marknorton, Take a look here ISO 1250 stuff . I'm sure you'll find what you were looking for!
fuchs Posted November 11, 2006 Share #62 Posted November 11, 2006 Guy, thank you for the testing you are doing. If I recall correctly, another user pointed out on a previous thread that for the streaking to happen, lights ought to be overexposed at least a full 4 stops. Do you remember if the ceiling halogens were overexposed that much? __ Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 11, 2006 Share #63 Posted November 11, 2006 It was really bright in there , I may go back in and try the kitchen again. It's about 6:30 am now and the sun has not come up Link to post Share on other sites More sharing options...
fuchs Posted November 11, 2006 Share #64 Posted November 11, 2006 Well, thank you, that would potentially be a definitive proof. It was suggested that visible light+IR was too much for the hit photosites to handle, and so the excess energy "travelled down" the sensors data download path causing the streak. As the sensor seems to be divided in two halves, the streak appears only on the hit half. __ Ed Albesi Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 11, 2006 Share #65 Posted November 11, 2006 Damn i just tried it again and simply can't get it to do it again. What my camera magically fixed itself. I will have to try some street lamps tonight. I can't get the halogons to do it again Link to post Share on other sites More sharing options...
rvaubel Posted November 11, 2006 Share #66 Posted November 11, 2006 Guy, thank you for the testing you are doing. If I recall correctly, another user pointed out on a previous thread that for the streaking to happen, lights ought to be overexposed at least a full 4 stops. Do you remember if the ceiling halogens were overexposed that much? __ Guy That was me. I measured the Number of stops past fully saturated (255) using the Raw plugin in CS2. I measured a number of different RAW files and it was pretty consistent. Try bracketing a number of overexposures. Damn I wish I had my M8!! Rex Link to post Share on other sites More sharing options...
fuchs Posted November 11, 2006 Share #67 Posted November 11, 2006 Advertisement (gone after registration) Damn i just tried it again and simply can't get it to do it again. What my camera magically fixed itself. I will have to try some street lamps tonight. I can't get the halogons to do it again That's umbeliveably good news to me! I'll be ordering IR cut filters in every size needed (39-46-55). Have you been trying the thin or the thick B+W ones ? Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 11, 2006 Share #68 Posted November 11, 2006 Guy That was me. I measured the Number of stops past fully saturated (255) using the Raw plugin in CS2. I measured a number of different RAW files and it was pretty consistent. Try bracketing a number of overexposures. Damn I wish I had my M8!! Rex I did like a 7 stop bracket and without the cut filter and can't it. i will try another scene tonight Link to post Share on other sites More sharing options...
Jamie Roberts Posted November 11, 2006 Share #69 Posted November 11, 2006 I did like a 7 stop bracket and without the cut filter and can't it. i will try another scene tonight Guy, this might make sense, actually. Have you got sodium lamps around there (street lights?). That can make the difference. I found last night that if I expose for the lights (really) then push in the RAW converter, it makes a huge difference than the other way round to streaking, regardless of ISO. So it might actually be an IR artefact too. Let's hope so. (And I still hope filters aren't the answer). Link to post Share on other sites More sharing options...
rvaubel Posted November 11, 2006 Share #70 Posted November 11, 2006 Guy, this might make sense, actually. Have you got sodium lamps around there (street lights?). That can make the difference. I found last night that if I expose for the lights (really) then push in the RAW converter, it makes a huge difference than the other way round to streaking, regardless of ISO. So it might actually be an IR artefact too. Let's hope so. (And I still hope filters aren't the answer). I agree that it is an IR artifact also. The light source must overexpose in the IR strongly. I'm going to a Leica Day demo at my local dealer (poor f**kers!) . I will be fully armed with color charts, black velvet, IR filters, etc Rex Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 11, 2006 Share #71 Posted November 11, 2006 Yes I am going after Sodium vapors tonight , I know i will get what I want. I may even use a tripod. Okay don't tell the purist I said that:D Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 11, 2006 Share #72 Posted November 11, 2006 Guy Damn I wish I had my M8!! Rex Rex are you in the States Link to post Share on other sites More sharing options...
rvaubel Posted November 12, 2006 Share #73 Posted November 12, 2006 Rex are you in the States Guy Yes, I live in Berkeley, Ca. But originally I am a Phoenix boy. I just got back from Keeble's in Palo Alto where the had a Leica demo with a guy from Germany. I brought my Greta charts, IR filters, black garter belts and leather corsets, just about everything I would need to build up an enormous cataloque of artifacts, purple haze, banding babbles, red threads and just about anything else. I haven't reviewed my loot yet but I fully intend to color profile the crap out of these files. I can't believe that the RAW data that the M8 provides isn't rich enough in content to be profiled in a way to produce stunning, livelike, prints. Maybe I'm wrong but I'm going to give it a shot By the way, if I will take a chrome one I could get an m8 maybe next week. Otherwise I'm number 27 on one list, and # 5 on another Rex ARF,ARF! Link to post Share on other sites More sharing options...
Jack_Flesher Posted November 12, 2006 Share #74 Posted November 12, 2006 Yes I am going after Sodium vapors tonight , I know i will get what I want. I may even use a tripod. Okay don't tell the purist I said that:D OMG!!!!!!!!!! A tripod under an M is *Heresy* Mancuso! , Jack Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 12, 2006 Share #75 Posted November 12, 2006 Jack I thought of you before I shot , saying Jack will laugh at me for days , so boo who i did not use one. Just tried the sodiums give me a minute. Seems weird going out there to actually blow a shot. LOL Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 12, 2006 Share #76 Posted November 12, 2006 Okay once again i tried it with Sodium vapor and it's funny i am out there actually blowing a exposure on purpose. LOL Well the cut filter helps slightly on the streaking which i thought maybe true but it did once again kill the reflections or ghosting so it did work there . Again shot at 1250 ISO and really blew it out. BTW i am a much better shooter than this. LOL Top without the IR filter and bottom with 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/8893-iso-1250-stuff/?do=findComment&comment=91254'>More sharing options...
Guest guy_mancuso Posted November 12, 2006 Share #77 Posted November 12, 2006 Now let's face a few facts here anyone shooting that far off deserves streaking , i am so far off here it's a joke. Now this is something i would call closer to normal. Now if I was hired by a client to shoot this store , frankly I would be breaking out the Profoto's and use strobe to fill in. But i am not downplaying this either it is a issue and it needs to be addressed and we also have seen it in much more normal night shots here is a normal without the IR filter 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/8893-iso-1250-stuff/?do=findComment&comment=91257'>More sharing options...
Guest guy_mancuso Posted November 12, 2006 Share #78 Posted November 12, 2006 Another example of the reflections or ghosts. Now i have no clue why that glow is over the Wendy's building in both shots , that must be a God thing. I have no answer for that one 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/8893-iso-1250-stuff/?do=findComment&comment=91262'>More sharing options...
Jamie Roberts Posted November 12, 2006 Share #79 Posted November 12, 2006 Hey Guy-- Thanks, as always, for this. You didn't use a tripod, did you! Anyway, the funky thing here is I don't see much streaking. Weird. I got the streaking, but not the blobs. Well, now we'll see what Leica says... BTW--out of 50 night shots last night, only one had a streak in it at all. Link to post Share on other sites More sharing options...
Guest guy_mancuso Posted November 12, 2006 Share #80 Posted November 12, 2006 It is cutting some of the streaking out and honestly it is becoming really hard to get it now. i simply could not get it again in my kitchen . I tried from about 5 different spots and a slew of over exposed shots. It does cut out the ghosting images and i would bet the green blobs are exactly that ghost images. And no i did not use a tripod, man Jack gave me the riot act for even mentioning a tripod. little does he know I still bought the RRS base plate for the M8. Link to post Share on other sites More sharing options...
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