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Lee Crump
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 15, 2004 - 12:17 pm: | 
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I have a minolta SRT 101 with a shutter speed problem. The shutter is slow at all speeds and the 1/1000 setting has no exposure at all. The camera cocks and fires OK, but the two section of the shutter do not seperate during the fireing. Any advise is appriciated. |
rick oleson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 15, 2004 - 07:23 pm: |
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The speed timing escapement in the SRT101 is under the top plate, near the shutter release button. To remove the top plate there are a couple of tricks: first, the red dot on the front above the lens is really a screw (you have to pick out the red disk to get to the slot), and second, the chrome ring around the shutter release button must be unscrewed and you may notice that it has no slots or holes in it. My approach to this is to glue a rubber pad onto the end of a wooden stick (a piece cut off of a broomstick will work)... then cock the shutter, press down hard onto the shutter release with the rubber end of the stick and twist hard anti-clockwise. Cocking the shutter first is important because this is the only way that the shutter release button will move downward as you press down - doing this with the shutter released will damage the camera. the shutter will fire as you press down but that's okay.
set the shutter speed dial to 1/1000 second and ASA 6400 before removing the screw in the top of the dial to disassemble it - this lets off the spring tension on the meter coupling doodads.
the other thing you probably want to reach is the shutter curtain springs. these are under the baseplate toward the left-hand end of the camera. don't just go tightening the spring tension before checking it out thoroughly though: if there is something else causing hte shutter hesitation (there probably is), tightening the springs to try to overcome it can cause damage.
good luck!
: )= |
Ed
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 16, 2004 - 08:26 am: |
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If there is no exposure at 1/1000 the curtain tension adj. is off. The adj. screws under bottom cover Rick mentioned are where you need to go. The one to the rear of camera is first curtain Adjust that a turn or two and check again. The curtain tension should be such that at the end of the travel there is a slight pull a the second curtain--not strong--it should be sufficient that it will trip the mirror release lever so the mirror will reset. When it appears to be about right work with the first curtain to achieve even exposure across the frame. Lacking a tester, a good way to do this is to view the shutter action with no lens on the camera and look thru the back while tripping--at a fluorescent light--at 1/1000 you should maybe three vertical bands--slightly darker the the rest of the opening--this is kind of hard to explain, but try it you'll see what I mean. The escapement under the topo cover is good only for speeds below 1/60. |
Stuart Willis
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 16, 2004 - 09:16 pm: |
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I have just been this route with a Minolta SRT 101 and whilst heartily endorsing all the Rick and Ed have said - may I add 20 cents worth ?
You may well be making adjustments which are compensating for dried out or congealed lube. If you follow all of the above and then decide to clean up and lube a few obvious spots - you might well end up at the opposite end of where you started.
IMHO - it is a good idea to remove the slow-speed escapement (easy - per just 2 screws). As well as providing for flood cleaning of that escapement you then have good visual access to the shutter-dial gear-stack mechanism which you can carefully clean and lube. You can also place a microdot of watch-oil on each of the 8 shutter curtain spindle bearings.
You might then very well find that no shutter tension adjustments are necessary at all.
For whatever it is worth.
Stuart Willis |
Ed
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 17, 2004 - 03:32 pm: |
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That's fine, but the escapement has no effect on any speeds above 1/60. They are controlled by curtain slot width, a scres at front off camera by the speed dial and another thru a hole in the speed dial (1/1000 only). |
Sam
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, December 21, 2004 - 10:39 am: |
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Hey Lee,
Try this out, pictures are better than words.http://www.willegal.net/photo/photo-first_page.htm |
