Problems with Nikon F-301

Discussion in '35mm Cameras and Accessories' started by tonyowen, Dec 4, 2018.

  1. tonyowen

    tonyowen Member
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    NIKON01.jpg NIKON02.jpg NIKON03.jpg NIKON01.jpg NIKON04.jpg I’m confused over two issues with my Nikon F-301 camera:-

    1] I’m wondering if one or other of the shutter curtains (blinds) is stuck.

    If I set a very slow speed either 1/30s or B and opening the back I cannot see any apparent shutter opening although the visible horizontal shutter slats vibrate. [Image 01]

    HOWEVER If I put a piece of marked paper on the film track [image 02] then I can see that paper image when the back is closed, the shutter button pressed. and viewed through the lens. [image 03]

    Please explain this paradox.

    2] An adaptor ring to allow 42mm lenses to be attached has become stuck in the Nikon Flange. The release button is not proud and cannot be pushed further inwards [image 04]. Any ideas for fixing?

    Regards

    Tony
     
  2. shutterfinger

    shutterfinger Subscriber

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    1. Nikon cameras with vertical travel focal plane shutters are designed to not fire the shutter with the back open.
    2. Hold the lens release button down as far as it will go then wiggle the adapter from the fully engaged to the removed positions.
    You may have to apply a fair amount of force to get it to move as its likely jammed the lock pin.
     
  3. John Koehrer

    John Koehrer Subscriber
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    The counter has to be on the first frame to do that the lever in the top groove should be depressed. You can do this with a toothpick
    put in the slot. Break the toothpick & you're looking at $$$ to get it out.
     
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    tonyowen

    tonyowen Member
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    Don't understand. Is the lever the one 'below' the 'n' in NIkon?? This moves radially anticlockwise until just passed the 'N' of Nikon and when released springs back to below the 'n'
    regards
    Tony
     
  5. shutterfinger

    shutterfinger Subscriber

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    No, its this one in the green circle.
    NIKON01.jpg
    Once depressed turn the camera on, press the shutter release and wait for the camera to run the load cycle.
     
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    tonyowen

    tonyowen Member
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    Maybe I'm thick, but how does this help/aid release the stuck adaptor??
    regards
     
  7. shutterfinger

    shutterfinger Subscriber

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    It doesn't.
    You asked why the shutter does not work with the back open, it answers that question.
    You asked how to get a stuck adapter off the camera, a suggestion was made.
    Have you had your daily Alzheimer's medication yet? (mine is French Roast. I think you guys use Earl Grey) :D
     
  8. shutterfinger

    shutterfinger Subscriber

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    DSC_3151.jpg
    This is a Nikon F4 lens opening. The arrow points to the lens release linkage that is in the edge of the image box.
    Being Nikon's build/design is similar between bodies then its likely with the back and shutter open on your camera you cam verify the lens lock pin is releasing with the button on the front and if not pull it back releasing the adapter.
     
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    tonyowen

    tonyowen Member
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    Mine is Bloody Mary or G&T, the Earl Grey is an afternoon tea. Seriously it was the sequence of postings that caused me to ask the 'daft question'. But as I've said before I'd rather ask the question than assume.

    How do I open the shutter earlier you said "Nikon cameras with vertical travel focal plane shutters are designed to not fire the shutter with the back open."

    regards and enjoy your coffee
    regards
     
  10. neilt3

    neilt3 Member

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    With the back closed you can set the camera shutter speed to "bulb" and press and hold the shutter release button down .
    As long as the shutter button is pressed down , the shutter will remain open .
    Then open the back , press the lens release button and see if the tab indicated moves when you press the button in .
    If you accidentally let go of the shutter release , the mirror will drop back down and the shutter will close on whatever you stuck in there , ruining your camera , so make sure you use the cable release .

    This won't do you much good though .
    I have the F301 , F501 and F4 and they all behave the same way .

    When you press the lens release button in , the indicated tab does also move in , but pressing the tab in as suggested does not pull the lens locking pin back in as suggested .
    So your lens is still stuck on . Just tried it on the above three cameras to confirm .

    As a last resort you could drill a hole in the M42 adapter above the locking pin and then press it in to release the adapter .
    Make sure it's the adapter that's at fauld before putting another lens on your camera though , otherwise that'll be stuck on it .
    You need to make sure that no metal swarf gets into your camera as well , and that you both drill in the right place and don't go to deep .

    Have you tried sliding a feeler gauge between the adapter and body to see if it just needs a bit of a jiggle to get the pin back in ?

    Being a £15 camera it's not the end of the world , you might want to decide if you want to save the camera or adapter .

    P.S ; a Bloody Mary or G&T with your breakfast ?!
    Shurley you mean a Guinness !
     
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    tonyowen

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    Don't like Guinness, especially when it is served chilled as in Dublin, - but the wife likes it having studied in Liverpool many decades ago
    regards
     
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    tonyowen

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  13. shutterfinger

    shutterfinger Subscriber

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    But that can be defeated by pushing in the switches tabs, then running the load sequence, then opening the shutter on B.
    Do a internet search for nikon f301 service manual from your location. I get a few free if you register links and a pay link or two. nikon f301 repair manual turns fewer links.

    Maybe its time for a dremel with a cutoff wheel.

    Edit:
    In the U.S. that model was sold as the N2000. The remote control socket is on the front of the camera between the strap eyelet and lens release. It uses the MC-12 A remote control cable which will provide the "cable release" function.

    Have you tried pushing in or pulling out on the adapter while holding the release button down and turning the adapter?
    Has the lens mount been bent from rough handling with a heavy lens on the camera?
    Grip it with a pair of soft joint pliers and see if it will turn before cutting it off.
    https://www.amazon.com/Stanley-Prot...1544301935&sr=8-5&keywords=non+marring+pliers
     
    Last edited: Dec 8, 2018
  14. neilt3

    neilt3 Member

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    Just a long shot here , and I don't want to insult you as I don't know your background with Nikon cameras , but.......

    My main camera system is Minolta autofocus and manual focus camera , I also use Canon EOS & FD gear , Contax SLR's , Pentax K & M42 , Bronica and Kiev Medium format SLR's and other stuff besides .
    Quite sensibly you twist the lenses on clockwise and remove them anti-clockwise .

    The first time I went to take a lens off on my other halfs Nikon DSLR I thought it was broke or something , for some silly reason Nikon messed up and made their lens mount go on the wrong way !
    I now have a few Nikon bodies and a handful of lenses , and I still try to take a lens off anti clockwise from time to time and wonder what's up with it ....

    Like I said , bit of a long shot but if it's a camera system not often used , it's an easy mistake to make .
     
  15. shutterfinger

    shutterfinger Subscriber

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    I had an FA on a tripod with a 75-300 zoom on it. Wind caused the tripod to fall over with the tilt handle of the tripod head, the pentaprism and rewind lever taking the hit on concrete.
    A slight scratch on the tripod handle, pentaprism, and rewind lever, and the bottom of the lens mount ring bent outward 1/8 inch between the bottom 2 mount screws on a 4 screw lens mount.
    The lens was a bear to get off the first time. The camera worked perfectly with a new lens mount installed. If it had been an adapter I would likely had to use pliers to get it off.
     
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    tonyowen

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    tonyowen

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    For clarity the attached image indicates the lever referred to in the last para of post #16 NIKON05.jpg
     
  18. shutterfinger

    shutterfinger Subscriber

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  19. OP
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    tonyowen

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    No idea, doubt if it has one - bought some years ago via eBay from China.
    Has been used on other Nikon cameras without problem
    regards
     
  20. choiliefan

    choiliefan Member
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    The lever referred to in message 17 translates the aperture setting of a Nikon AI lens to the meter.
     
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    tonyowen

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    info01.jpg
    For clarity, attached are two images one shows the attached lens's 'index' mark is slight off the 12 o'clock position.
    The other image shows the 'back' of a similar adaptor [this one Nikon to T mount} and there is only the shallow grove/slot into which the release pin 'sits when properly fitted.
    I've applied considerable torque to the adaptor and it doe snot move at all.
    I'm worried about tearing out the camera flange and do not see how the adaptor can be safely removed.
    I think somehow that I put the adaptor in offset to the aligning dot and it has become skewed. info02.jpg
    Yes, I could cut it out, but to what advantage as the M42 lens fits okay and does focus at infinity.
    regards
     
  22. shutterfinger

    shutterfinger Subscriber

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    tonyowen

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    Used 0.010 inch shim fitted between rear of adaptor and flange face. Gap seemed bigger on wide of release button [ie adaptor not flat???]
    Fitted lens to adaptor tried to remove both using high torque values by hand - not movement of 'assembly' only result was the lens was difficult to remove from adaptor.

    regards
     
  24. shutterfinger

    shutterfinger Subscriber

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    I'm out of ideas.
     
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