Archived posting to the Leica Users Group, 2006/12/27
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Gene, I don't know if the Metz units with the current SCA 3502 adapter work in TTL mode. The Leica tech specs say SCA 3502 (from version 4). I don't know what adapters are version 4 compatible. I would do what Ted says. When you get the M8 try your SF20 and see how it works. I know it will work in "A" mode. The SF20 works fine on my Nikon D2X in "A" mode. It has not been established if it works in TTL mode on the M8. If it doesn't work the way you like then go out and buy the SF24D. Len On Dec 27, 2006, at 12:36 PM, grduprey@mchsi.com wrote: > Go out and buy the Leica 24D flash madse for M Cameras. Sine you > had th4 money for the M8, you can afford the $270 for the 24D. It > works great and is not very heavy on the M cameras. I use one when > it is needed on my M6TTL and it works great. If you are a heavy > flash user, get one of the Metz units with the appropriate modules. > > Gene > > > -------------- Original message from "Don Dory" > <don.dory@gmail.com>: -------------- > > >> Frank, >> With infinite respect for your abilities in photojournalism and >> general good >> humour, you are completely off base about the shutter on the M8. This >> sensor in the M8 works as an analogue light collector with an A/D >> converter >> downstream. The shutter opens, the sites on the CCD collect light, >> the >> shutter closes and the microprocessor collects the information >> from the A/D >> converter. Simplified of course; there is a amplification circuit, a >> buffer, and some pretty sophisticated programming to adjust the >> information >> coming off the sensor into something that resembles an image that >> the human >> mind will interpret as a picture. >> >> With any of the current CCD or CMOS sensors try to use B and very >> quick >> fingers with a hat or lens cap as a sensor, you will almost always >> have a >> blown image unless you are in the coal mine at midnight. The >> sensor in the >> M8 works in some way just like film in that at a given level of >> amplification there is a 5 to 8 stop range where the information >> is not >> white or black. >> >> Cheers, >> Don >> don.dory@gmail.com >> >> On 12/26/06, Frank Filippone wrote: >>> >>> OK.. I went there and read the following under M8 tech specs at >>> the Leica >>> USA site.... >>> --------------------- >>> To quote....... >>> Shutter: >>> Micro-processor controlled metal-blade slotted shutter with vertical >>> movement. >>> Shutter Speeds >>> In automatic mode (A) steplessly from 32 s to 1/8000 s. Using manual >>> setting 4 s to 1/8000 s in half steps. >>> B for long exposures of any duration. >>> Shutter action optimized for minimum noise. Driven by an electric >>> motor >>> -------------------- >>> Having read that, I will repeat that the shutter in the M8 is >>> only for a >>> dust ( and overload) sensor cover. It does nothing for the >>> exposure. Let me explain..... >>> >>> The sensor is gated fully under electronic digital control. It has >>> nothing to do with a mechanical part anywhere in, round or under >>> the camera. It is both easier to do it this way, it works, it >>> needs no >>> calibration, and it is cheap to make. It is totally >>> electronic. >>> >>> The shutter COVER, or what you might call a shutter, does not do >>> anything >>> to the exposures. If it did, Leica would have to make an >>> infinitely variable shutter accurate to 1/8000 of a second, and >>> keep it in >>> calibration. Ain't going to happen. Nikon proved that >>> in the 8008 and other cameras. >>> >>> I think it is important that users know what they are getting in >>> an M8 or >>> other digital camera ... this mechanical shutter is >>> probably ( maybe, maybe not) timed to open and close in some >>> relationship >>> with the exposure. It does not matter how long the >>> shutter is open; as long as it is long enough for an exposure to be >>> recorded. It can be a LOT longer the light is gated by a >>> digital signal, not a mechanical device. Very similar to the baffle >>> shutter in a Hasselblad 500 series. >>> >>> Notice carefully that Leica never claims that the shutter speed is >>> mechanical nor do they claim the shutter is timed for any time >>> duration... They claim the shutter is a vertically moving metal >>> blade >>> slotted shutter. The shutter speeds are the ones that are >>> timed with specs on them. There is a big difference between the >>> shutter >>> speeds that affect the exposure, and the shutter that only >>> covers the sensor. What I called a baffle. >>> >>> dPreview does not add any information. I am sure they are nice >>> guys, but >>> technically, anyone that claims the reason a M8 can have >>> higher synch speed than a M7 is because of a different shutter is >>> just >>> plain not correct. The synch is digitally controlled as are >>> the gating functions of the sensor. There is no mechanical >>> association in >>> a M8. There is in any previous film oriented M ( or >>> LTM).. >>> >>> BTW, if you owned a M8, you could easily prove me wrong.... Try the >>> shutter at different speeds with no lens. You should see the >>> light baffle open and close faster with increasing speed, like a >>> real >>> shutter does. You do not have to be 100% accurate, you only >>> need to note if the thing stays open longer with increasing exposure >>> time.... It should be pretty obvious. >>> >>> If there is some evidence that the M8 has a mechanically timed >>> exposure, I >>> still have not seen it......If you, or someone else on >>> this list, own a M8, check out the shutter /baffle/ whatever you >>> want to >>> call the thing that moves out of the way to allow the >>> light to hit the sensor. Then we have some form of data that is not >>> marketing speak..... >>> >>> I would promise to eat a bug if I am wrong, but Cal Worthington has >>> already done that one..... >>> >>> Frank Filippone >>> red735i@earthlink.net >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information