Re: More help from LX Illuminati
On 7 Nov 2002 at 16:58, William Robb wrote: > I do wonder if it isn't some sort of noise (for lack of a better > word) caused by the mirror movement. Something like a very small > static charge could, I suppose, cause the timing circuit (which > goes through the iso resistor) to goof the exposures. > Something like this would affect the camera more when the meter > is set to it's most sensitive setting. > Did anyone else run this test with the mirror locked? And if so, > was the camera more repeatable? It does sound like a very reasonable explanation, the areas that could be affected are the ISO resistor array and the aperture position resistor array. The system is analogue and at the settings at which the problem occurs it is at the extremes. The LX metering system is wholly undamped so that it can respond near instantaneously to electronic flash so any very short duration discontinuity could potentially throw the metering out of spec. Also the original design only accommodated ISO1600 films at the fastest, I believe the retro-fit to my old one was simply the addition of a new ISO dial with a longer resistor array, no other circuit components were changed. I will test mine with the mirror up and report the results when I find some spare time. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications.html
Re: More help from LX Illuminati
On 7 Nov 2002 at 1:47, Anton Browne wrote: > Thank you for your replies and responses. > > I shoot singers in low light situations (web site to come) I use 3200 ISO film > with 50mm 1.2, 85mm 1.4 & 135mm 1.8 lenses wide open, a monopod is employed. > Shutter speeds are 1/15 to 1/60. Using a slower film results in movement blur > (believe me, blurred mouths are not attractive). I use exactly the same kit less the monopod plus an FA24f2 and sometimes LTD31/1.8 when I am out shooting bands however I seem to be able to get away with 800ISO film in most instances, how dark are the venues that you shoot in? I only really use film at EI3200 in the dark. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications.html
Re: More help from LX Illuminati
On 6 Nov 2002 at 22:21, William Robb wrote: > The results of my test are quite interesting, as they confirm > your findings, but do not limit the problem to the new shutter > style. > In fact my two old style shuttered cameras were both the best > and the worst. > What I did find fascinating is the results when the mirror was > locked. > I think this indicates the problem may have something to do with > the mirror, more so than the shutter. Mine are all over the place too, I had more problems with my older body. I can't say that I recall having such experiences in the field. However I'm normally not at ISO3200/f22/1sec in a dim room and I normally have film loaded. I'll have to load up with some dodgy film and test again in a real scenario. I was a little surprised though I must say. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications.html
Re: More help from LX Illuminati
Those times were measured with a stopwatch, nit a shutter tester, so there is some human error in the measurements. William Robb
Re: More help from LX Illuminati
- Original Message - From: Anton Browne Subject: More help from LX Illuminati > I thank you for your responses but none of you has actually run the test. I know it's a pain but it only takes five minutes. At present my feeling is that all second shutter LX's will display this fault at 3200 ISO. Have I just had a run of bad luck or can you confirm this? If you run the test I can put it to rest. Are you up for it? It took somewhat longer than 5 minutes. The results of my test on this subject are more easily viewed as a web page. Please see: http://users.accesscomm.ca/wrobb/LX_test.html All three of my LX's have been recently serviced, all have come back from the shop within the last 6 weeks. All three had their ISO resistors replaced with new ones, so should not have any possibility of corrosion, and little possibility of dirt. The results of my test are quite interesting, as they confirm your findings, but do not limit the problem to the new shutter style. In fact my two old style shuttered cameras were both the best and the worst. What I did find fascinating is the results when the mirror was locked. I think this indicates the problem may have something to do with the mirror, more so than the shutter. William Robb
Re: More help from LX Illuminati
At present my feeling is that all second shutter LXs will display this fault at 3200 ISO. Have I just had a run of bad luck or can you confirm this? If you run the test I can put it to rest. Are you up for it? Well, can't disprove it by me. I ran your test with my LX and it does indeed exhibit this annoying irregularity in shutter speeds at 3200 (also at the next notch down, I might add.) My LX has the later shutter (per your description). Hope this helps. It was certainly an interesting piece of information for me to get. ERNR
RE: More help from LX Illuminati
Wow! Same thing with my recently CLA'd LX (old style shutter). I would have never found this out; I only shoot @ 800 ISO or slower... On mine, the incorrect shutter appears to be approximately 1/30 sec. instead of 2 seconds. Regards, Jose R. Rodriguez -Original Message- From: Rofini [mailto:mrofini@;sprynet.com] Sent: Wednesday, November 06, 2002 8:19 PM To: [EMAIL PROTECTED] Subject: Re: More help from LX Illuminati >..and pointed out the erratic shutter on Auto at 3200. >At present my feeling is that all second shutter LXs will >display this fault at 3200 ISO. Have I just had a run of bad >luck or can you confirm this? If you run the test I can put it >to rest. Are you up for it? > >Thank you >Anton Browne Just tried this on two LX's with old style shutter curtain. Same problem at 3200 ISO as your camera. Erratic timing once every four to ten shutter releases. Absolutely no erratic behavior at 800 ISO. Mark Rofini
Re: More help from LX Illuminati
>..and pointed out the erratic shutter on Auto at 3200. >At present my feeling is that all second shutter LXs will >display this fault at 3200 ISO. Have I just had a run of bad >luck or can you confirm this? If you run the test I can put it >to rest. Are you up for it? > >Thank you >Anton Browne Just tried this on two LX's with old style shutter curtain. Same problem at 3200 ISO as your camera. Erratic timing once every four to ten shutter releases. Absolutely no erratic behavior at 800 ISO. Mark Rofini
