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have i managed to buy a camera with two faulty lenses
have i managed to buy a camera with two faulty lenses or am i havin a blonde day i have an old canon and i was trying to see if my apperture was work on both 28 + 50 mm lenses and when i run through all the f stops the iris dosent move. is this just me being stupid do they only move when attached to the camera, hope someone can shed some light on this thanks, sean
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#2
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have i managed to buy a camera with two faulty lenses
On Wed, 01 Sep 2010 23:51:58 -0400, Attila Jozsef
wrote: In article , sean-sheehan wrote: have i managed to buy a camera with two faulty lenses or am i havin a blonde day i have an old canon and i was trying to see if my apperture was work on both 28 + 50 mm lenses and when i run through all the f stops the iris dosent move. is this just me being stupid do they only move when attached to the camera, hope someone can shed some light on this thanks, sean To fully answer we need to know what model camera you have, and what type and version of lenses you have. That being said, in general* when you "run through all the f stops" you will not see the iris move. Most cameras are designed to communicate the f/ stop to the body electronically, and do not physically stop down until just before the picture is taken. The sequence is something like: push button to take picture, iris closes down to the indicated aperture, mirror jumps up, shutter opens, shutter closes, mirror returns down, iris opens to maximum aperture. Some cameras have a "depth of field preview" button or lever which stops down the lens while you are looking through the viewfinder so you can see and adjust the amount of depth of field the final image will have. Hope this helps * In the case of rangefinders such as the Leica M8, M8.2, and M9, this does not happen since you do not see through the taking lens. Of course, that supposes that you have a camera that communicates electronically between the lens and the camera body. If it's old enough that the camera doesn't need batteries (except maybe for the meter) then the iris should stop down. But what Atilla says is probably correct unless it is a really old camera. |
#3
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have i managed to buy a camera with two faulty lenses
sean-sheehan wrote:
have i managed to buy a camera with two faulty lenses or am i havin a blonde day i have an old canon and i was trying to see if my apperture was work on both 28 + 50 mm lenses and when i run through all the f stops the iris dosent move. is this just me being stupid do they only move when attached to the camera, hope someone can shed some light on this thanks, sean You mention Canon. What model camera? Are the lenses the old Canon FD type? Dick |
#4
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have i managed to buy a camera with two faulty lenses
On 9/2/2010 12:15 AM rwalker spake thus:
On Wed, 01 Sep 2010 23:51:58 -0400, Attila Jozsef wrote: In article , sean-sheehan wrote: have i managed to buy a camera with two faulty lenses or am i havin a blonde day i have an old canon and i was trying to see if my apperture was work on both 28 + 50 mm lenses and when i run through all the f stops the iris dosent move. is this just me being stupid do they only move when attached to the camera, hope someone can shed some light on this thanks, sean To fully answer we need to know what model camera you have, and what type and version of lenses you have. That being said, in general* when you "run through all the f stops" you will not see the iris move. Most cameras are designed to communicate the f/ stop to the body electronically, and do not physically stop down until just before the picture is taken. The sequence is something like: push button to take picture, iris closes down to the indicated aperture, mirror jumps up, shutter opens, shutter closes, mirror returns down, iris opens to maximum aperture. Some cameras have a "depth of field preview" button or lever which stops down the lens while you are looking through the viewfinder so you can see and adjust the amount of depth of field the final image will have. Hope this helps * In the case of rangefinders such as the Leica M8, M8.2, and M9, this does not happen since you do not see through the taking lens. Of course, that supposes that you have a camera that communicates electronically between the lens and the camera body. If it's old enough that the camera doesn't need batteries (except maybe for the meter) then the iris should stop down. But what Atilla says is probably correct unless it is a really old camera. Not true. Most (almost all?) non-electronic, mostly-mechanical cameras (35mm SLRs) use "wide-open" viewing, so the aperture doesn't close until the shutter is released. Typical of this type of camera is my Minolta SRT-101, which can be used without a battery (only powers the meter, which the camera will work without). Twisting the aperture ring does nothing to stop down the iris, unless the depth-of-field preview button is pushed. -- The fashion in killing has an insouciant, flirty style this spring, with the flaunting of well-defined muscle, wrapped in flags. - Comment from an article on Antiwar.com (http://antiwar.com) |
#5
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have i managed to buy a camera with two faulty lenses
"sean-sheehan" wrote in message ... have i managed to buy a camera with two faulty lenses or am i havin a blonde day i have an old canon and i was trying to see if my apperture was work on both 28 + 50 mm lenses and when i run through all the f stops the iris dosent move. is this just me being stupid do they only move when attached to the camera, hope someone can shed some light on this thanks, sean -- sean-sheehan If it's the Canon FL or FD mount lenses, the lens stays wide open unless the manual stop-down or the pin is activated. The aperature on FL mount lenses can be activated simply by pushing the pin sticking out the back to the side. The FD mount lenses have the same pin, but depending on their vintage, the pin might only work when the lens is mounted on the camera. When I need to check one of my Canon FL mounts lenses, I usually mount it on an extension tube. Ken Hart |
#6
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have i managed to buy a camera with two faulty lenses
David Nebenzahl wrote:
snip Most (almost all?) non-electronic, mostly-mechanical cameras (35mm SLRs) use "wide-open" viewing, so the aperture doesn't close until the shutter is released. Typical of this type of camera is my Minolta SRT-101, which can be used without a battery (only powers the meter, which the camera will work without). Twisting the aperture ring does nothing to stop down the iris, unless the depth-of-field preview button is pushed. Yup, my old Canon FTb (same vintage as your SRT-101) works the same way. We need more info from the OP! Dick |
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have i managed to buy a camera with two faulty lenses
On 9/2/2010 11:02 AM dickr2 spake thus:
David Nebenzahl wrote: snip Most (almost all?) non-electronic, mostly-mechanical cameras (35mm SLRs) use "wide-open" viewing, so the aperture doesn't close until the shutter is released. Typical of this type of camera is my Minolta SRT-101, which can be used without a battery (only powers the meter, which the camera will work without). Twisting the aperture ring does nothing to stop down the iris, unless the depth-of-field preview button is pushed. Yup, my old Canon FTb (same vintage as your SRT-101) works the same way. We need more info from the OP! Well, since almost all 35mm SLRs of that vintage work exactly the same way, it's likely his (her?) camera works perfectly well. But yes, it would help to know what camera we're dealing with here. -- The fashion in killing has an insouciant, flirty style this spring, with the flaunting of well-defined muscle, wrapped in flags. - Comment from an article on Antiwar.com (http://antiwar.com) |
#9
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Quote:
thanks everyone its a canon av-1 with standard fd canon lenses |
#10
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have i managed to buy a camera with two faulty lenses
On 9/2/2010 11:04 AM sean-sheehan spake thus:
rwalker;889144 Wrote: Of course, that supposes that you have a camera that communicates electronically between the lens and the camera body. If it's old enough that the camera doesn't need batteries (except maybe for the meter) then the iris should stop down. But what Atilla says is probably correct unless it is a really old camera. hey thanks yeah its too old for that its a canon av-1 with a canon fd 50mm lens and a canon 28mm lens i can see the iris and its not at maximum maybe around the 11 f-stop size on both lenses and as i spin the apperture round nothing happens on either just thought this was not right The AV-1 works as has been described for other cameras of this vintage: if you operate the f-top ring, the lens does *not* stop down. And it seems as if your lenses are working normally as well. I just checked my Canon FD lens (50mm), and when removed from the camera, the aperture seems to sit about halfway closed, not fully open. Of course, with the lens mounted on the camera, it should be fully open when viewing through it. What happens when you mount the lens on the camera? -- The fashion in killing has an insouciant, flirty style this spring, with the flaunting of well-defined muscle, wrapped in flags. - Comment from an article on Antiwar.com (http://antiwar.com) |
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