Question about Nikon Pk-3 Extension Tube Make Lens A Macro N D Mount

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How to use Nikon Pk-3 extension tube?

I have an old Nikon Pk-3 extention tube, I tried with different focal lenses with no results, is it for a specific kind of lens?. Thanks for help.

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  • kakima Jan 03, 2013

    I just tried my tube with a 50mm lens. Instead of focusing at 0.45m, I had to get less than half the distance in order to focus.



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It should work with just about any lens, though it works best with moderate focal lengths (say about 24mm to 200mm). Its primary purpose is to let the lens focus much closer than normal.

When you say "no results," do you mean it's not letting you focus closer? Mount the tube on the camera, mount a lens on the tube, then focus the lens to its minimum focus distance. Looking through the viewfinder, move closer to an object until it comes into focus. Does it come into focus? How close? What lens(es) are you trying?

Posted on Jan 03, 2013

  • jvelarde08 Jan 03, 2013

    Thank you, yes now i got it, I was trying with wide angle lenses, thanks for the help.

  • kakima Jan 04, 2013

    Extension tubes can be used with wide angles. The problem is that sometimes they work TOO well, and you have to have the subject inside the lens in order to get close enough.



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Unfortunately it's not possible. Along with the Olympus OM system, Nikon had very deep camera bodies so you cannot get adapters which will allow infinity focussing. As a result, very few adapters were ever made and those which exist only allow the lens to be used for close-up photography. Even when a converter is available it does not usually permit automatic lens operation nor does it allow the communication of aperture settings to the camera body.

You will have to obtain Nikon F-Mount lenses if you wish to use your FG. They don't have to be expensive: I've acquired a fair collection of both lenses and bodies in the last two years for the princely sum of zilch just by looking on my local FreeCycle/Freegle groups.

Online auction sites have plenty of them, but as long as you're not after the more unusual and higher quality lenses which attract collectors prices can be quite low. If the lenses are third party ones from the likes of Sunagor, Hoya, Bell & Howell, Miranda and a few others then they're usually perfectly good but were budget brands and usually are near worthless. Other third party brands such as Tamron, Tokina, Vivitar, Sigma were regarded as much better quality (often unjustifiably) and so command higher prices but the "bread and butter" lenses still tend to be relatively cheap.

Conversely, Canon 35mm SLR bodies were the thinnest ones around and so could accept adapters to take virtually all other 35mm SLR lenses. A few were even sophisticated enough to allow automatic operation and lens to body communication of the aperture setting but they were very scarce and expensive. I've also acquired a lot of Canon SLRs and lenses from FreeCycle/Freegle, so again there is no need to spend anything other than shipping costs and to invest in a few batteries and occasional spare parts/foam renovation kits.

I hope that my answer has not burst your bubble, instead I hope that it's given you new possibilities. All I ask in return is that you rate my answer.

For more details on mounting mismatched lenses and bodies, see the excellent CameraQuest website:-

Posted on Oct 26, 2009

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