swamiji Posted May 17, 2012 Share #21 Posted May 17, 2012 Advertisement (gone after registration) Could you please elaborate on this statement?Indeed, I have disassembled uncompressed raw files from Nikon and besides various bits of information (aperture, speed, date and time, lens type, WB, ...) proprietary or not, the luminance information is there unprocessed. I still have to do the exercise for Leica. So I am curious and anxious to learn what kind of processing is done to their raw files (besides rendering on the back screen or compression)? Their has been several threads on this topic already, I wouldn't want to take credit for others work. Lets just say, they dispelled the myth nicely. Link to post Share on other sites More sharing options...
Advertisement Posted May 17, 2012 Posted May 17, 2012 Hi swamiji, Take a look here Expodisc. I'm sure you'll find what you were looking for!
algrove Posted June 1, 2012 Share #22 Posted June 1, 2012 So I wonder what the answer will be for those shooting both M9 and MM in the same light? Link to post Share on other sites More sharing options...
swamiji Posted June 2, 2012 Share #23 Posted June 2, 2012 So I wonder what the answer will be for those shooting both M9 and MM in the same light? I guess I will find out, as I have a MM on order, but I expect the answer will be similar to that of film. There will be no color temperature, but you can modify the image by use of color filters. Certain lighting will bring out certain colors as brighter in an image. I am not sure that an Expodisc will be needed, but I will test. Link to post Share on other sites More sharing options...
algrove Posted June 4, 2012 Share #24 Posted June 4, 2012 What about a simple WhiBal card like I use now? Link to post Share on other sites More sharing options...
swamiji Posted June 6, 2012 Share #25 Posted June 6, 2012 So I wonder what the answer will be for those shooting both M9 and MM in the same light? My dealer just got a demo MM to test with for the day. There is no White Balance, No menu options for it, Nothing at all. There also is no snap shot mode either. Link to post Share on other sites More sharing options...
lars_bergquist Posted June 6, 2012 Share #26 Posted June 6, 2012 My dealer just got a demo MM to test with for the day. There is no White Balance, No menu options for it, Nothing at all. There also is no snap shot mode either. No snapshot mode is in itself a great leap forward for mankind. I keep dropping into it inadvertently. The old man from the Age of Dials and Levers Link to post Share on other sites More sharing options...
tredlie Posted August 14, 2012 Share #27 Posted August 14, 2012 Advertisement (gone after registration) An additional advantage of the Expodisc is that it can change your camera's built in reflected-light meter into an incident meter. And that meter has until now been an even more essential accessory. The old man from the Selenium Age I know, this is already rather dated, but still, Lars may read this. Can you explain how and why you use the ExpoDisc as an incident meter and to what effect? Thanks in advance Tredlie Link to post Share on other sites More sharing options...
lars_bergquist Posted August 15, 2012 Share #28 Posted August 15, 2012 I know, this is already rather dated, but still, Lars may read this. Can you explain how and why you use the ExpoDisc as an incident meter and to what effect? Thanks in advance Tredlie I have already described this simple procedure in an earlier posting on this thread: http://www.l-camera-forum.com/leica-forum/digital-forum/238355-expodisc-3.html The Expodisc is calibrated for this, so you just hold it in front of your lens with the side with the little dimples facing forward (you may want to remove the hood, but the M meters WB from the central part of the frame only, so it's not a problem). The disc comes in different diameters, mine is ø58mm, which works nicely. The manual exposure values for aperture and speed that you obtain will give you a perfect 'ZoneV' exposure. Remember, again, that you are metering the light that falls on the subject from a direction approximately that of the camera, i.e. the illuminance (light intensity) of the subject. The great point of this is of course that this illuminance value is totally independent of the brightness or colour of the subject proper. Meter a baker in his flour bin, or a chimneysweep in a coal hole – if the light falling on them is of the same intensity, the metering value will be the same. A reflected light meter, on the other hand, e.g. the built-in meter of any camera, will try to represent both the baker and the sweep as a medium (18%) grey, which is patently wrong in both cases. A meter is a simple device which does not 'know' a thing about WHAT you are taking a picture of. So it has to be designed from a standard average assumption, and the industry's standard assumption is that the subject has a reflectance of 18% (reflecting 18% of the light that falls on it). If this is not the case – as with the baker or the sweep – you are in deep water and have to guess at the proper exposure, setting it via the exposure compensation. Incident light metering removes the guesswork. After half a century, I am pretty good at guessing exposure, but I prefer certainty. The old man from the Selenium Age Link to post Share on other sites More sharing options...
JT07 Posted September 15, 2012 Share #29 Posted September 15, 2012 Lars, thanks so much for the detailed explanation regarding this process. I appreciate you taking the time. Great info shared. I'm off to buy one tomorrow. . Link to post Share on other sites More sharing options...
JT07 Posted September 15, 2012 Share #30 Posted September 15, 2012 Btw, what size expo disc do you recommend? Link to post Share on other sites More sharing options...
lars_bergquist Posted September 15, 2012 Share #31 Posted September 15, 2012 Sorry if I'm late with the answer. I use a 58mm disc (it sits in a mount somewhat like a common filter mount). The mount can be snapped in place, held by small spring-loaded balls, if the external diameter of the lens is right, but I don't care. I just hold the disc with my left hand's fingers while my right forefinger spins the shutter dial. The 58mm size means that even a 55mm filter size is covered. The old man from the Selenium Age Link to post Share on other sites More sharing options...
JT07 Posted September 15, 2012 Share #32 Posted September 15, 2012 Thank you Lars. Makes perfect sense. I appreciate the tip. Link to post Share on other sites More sharing options...
tobey bilek Posted September 15, 2012 Share #33 Posted September 15, 2012 I use the Whi bal Card. Guaranteed neutral grey. Link to post Share on other sites More sharing options...
kcg Posted September 18, 2012 Share #34 Posted September 18, 2012 $80 tools, $90 tools, $100 tools. And they all work. I use a white coffee filter attached with a rubber band. Same results/perfect white balance. And I get several hundred in a package. They take up zero space in my bag, and are just about weightless. I supply all my friends for free. Not a bad deal. Link to post Share on other sites More sharing options...
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