how do you control apeture on m42
Posted 09/07/2010 - 12:38
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Hello
I have two M42 lenses, the lens should have an apeture ring on which you select the apeture manually.
On my K10d I needed just to enter the set up menu and set it to allow the camera to be used with the apeture ring manually - sadly I can't remember the exact term, the camera is at home and i am in work so I cannot check.
Once you select the apeture just press the ael button (if using digital)and the camera will set the exposure - correctly most of the time just keep an eye on your histogram if using digital.
On the K10D if you use the shake reduction you need to enter the focal length one benefit of which is that the camera will record the focal length in the exif data.
Enjoy.
I have two M42 lenses, the lens should have an apeture ring on which you select the apeture manually.
On my K10d I needed just to enter the set up menu and set it to allow the camera to be used with the apeture ring manually - sadly I can't remember the exact term, the camera is at home and i am in work so I cannot check.
Once you select the apeture just press the ael button (if using digital)and the camera will set the exposure - correctly most of the time just keep an eye on your histogram if using digital.
On the K10D if you use the shake reduction you need to enter the focal length one benefit of which is that the camera will record the focal length in the exif data.
Enjoy.
Posted 09/07/2010 - 12:47
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Hey Joseph,
I have an *istD permanently dedicated to M42 lenses - I have eight or nine at last count - I just use the Manual/Auto select on the SMC Taks and the earlier Pre-Set Taks do not have a pin.On all the lenses aperture can be controlled by the lens ring as required in Manual or Green setting,P,Tv or Av.
Hope this helps
Regards
Tony
I have an *istD permanently dedicated to M42 lenses - I have eight or nine at last count - I just use the Manual/Auto select on the SMC Taks and the earlier Pre-Set Taks do not have a pin.On all the lenses aperture can be controlled by the lens ring as required in Manual or Green setting,P,Tv or Av.
Hope this helps
Regards
Tony
K20D,*istD ( now a dedicated M42 digital ),K100D,MZ5N,P50,ME Super,Spotmatic 1000,Spotmatic,ESII,ES,H2.18-55 II,18-55,75-300 FAJ,35-80 FA,80-200 F,28-105 FA,Sigma 24-70 AF Aspherical,Sigma 28-300 Hyperzoom , Praotor II 500 M42,Centon 500mm mirror,and a few Pentax M42 Taks,super-Taks,smc Taks,A and M lenses.Benbo trekker,7dayshop monopod and a Lowepro rucksack.
I am now on Flickr which is nice !
I am now on Flickr which is nice !
Posted 09/07/2010 - 12:50
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redbusa99 wrote:
when you fit m42 lens to body with adaptor unable to adjust apeture as the pin goes inside adaptor. do you araldite pin in poition so apeture can be set
when you fit m42 lens to body with adaptor unable to adjust apeture as the pin goes inside adaptor. do you araldite pin in poition so apeture can be set
If your lens doesn't have an auto/manual switch then yes, you will need to stop the pin from springing out again. Some people use glue for this, or there is also a special M42-PK adapter you can get which pushes the pin in (Cardiff_Gareth has just ordered one of these, see here).
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
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AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Posted 09/07/2010 - 12:59
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the lens i have is a tokina .ther is a springloaded pin, looking down onto the base of the lens it protrudes through the face of the thread .it has to be puhed in to allow the apeture ring to work otherwise apeture is wide open, i assume it should come into contact with a face or something as you screw it in but on the k7 there is nothing for it to make contact with
Posted 09/07/2010 - 13:20
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it's the auto-stop down pin which allowed cameras to stop the lens down automatically at exposure time, meaning the photographer could focus with the lens wide open. There was a moving plate inside the throat of compatible M42 cameras so that the camera could push the pin in when the shutter fired.
Most M42 lenses with this feature have a switch for Auto/Manual operation. If this is present, set it to manual and the aperture ring will work. If there is no switch, you'll need to jam the pin with something.
Most M42 lenses with this feature have a switch for Auto/Manual operation. If this is present, set it to manual and the aperture ring will work. If there is no switch, you'll need to jam the pin with something.
you don't have to be mad to post here
but it does help
but it does help
Posted 09/07/2010 - 14:16
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redbusa99 wrote:
the lens i have is a tokina .ther is a springloaded pin, looking down onto the base of the lens it protrudes through the face of the thread .it has to be puhed in to allow the apeture ring to work otherwise apeture is wide open, i assume it should come into contact with a face or something as you screw it in but on the k7 there is nothing for it to make contact with
the lens i have is a tokina .ther is a springloaded pin, looking down onto the base of the lens it protrudes through the face of the thread .it has to be puhed in to allow the apeture ring to work otherwise apeture is wide open, i assume it should come into contact with a face or something as you screw it in but on the k7 there is nothing for it to make contact with
Sorry, perhaps I wasn't being very clear, but I thought I had addressed this in the message above yours
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Posted 09/07/2010 - 14:39
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thoughton wrote:
If your lens doesn't have an auto/manual switch then yes, you will need to stop the pin from springing out again. Some people use glue for this, or there is also a special M42-PK adapter you can get which pushes the pin in
If your lens doesn't have an auto/manual switch then yes, you will need to stop the pin from springing out again. Some people use glue for this, or there is also a special M42-PK adapter you can get which pushes the pin in
Attaching a small, filed-smooth fragment of CD (use those free AOL ones) using loctite works much better (and is less likely to fail at some future point) than simply superglueing the pin itself in my experience
Posted 09/07/2010 - 21:05
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Apologies,
I was limited by time earlier, my error for rushing.
However, now there is more info I can give a better answer but may not really add anything to the above.
I have a Tokina 300 f5.5, it has this pin, the apeture ring does not operate the apeture unless it is set to manaul so all I do is leave it on manual and attach it to my m42 to k adapter and it works perfectly on my k10d.
Cheers
Stuey
I was limited by time earlier, my error for rushing.
However, now there is more info I can give a better answer but may not really add anything to the above.
I have a Tokina 300 f5.5, it has this pin, the apeture ring does not operate the apeture unless it is set to manaul so all I do is leave it on manual and attach it to my m42 to k adapter and it works perfectly on my k10d.
Cheers
Stuey
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