Question about Quantaray Cameras

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My friends father recently stumbled upon a 100-300mm quantaray. It connects Nikon 3000 and my d5000 but the af doesn't work. We've looked it up and down for a button to switch to AF but there's none. We dont even know if it has a motor! The lens on the front says

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That lens has a coupling on the lens mount which you'll see rotating when you alter the focus ring and look at the back of the lens. it does not have an in-built focus motor and so will only autofocus with Nikon bodies which incorporate a mechanical AF coupling on the lens mounting flage.

Posted on Jul 01, 2011

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Posted on Jan 02, 2017

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Which is better to get - manual focus or AF extention tubes for Nikon D3100


AF tubes will let you focus manually, so you don't lose anything by getting AF tubes (except for additional money, perhaps). However, most close-up work requires manual focus anyway due it the very limited depth of field, so you won't gain much by getting AF tubes.

Personally, I've never missed the AF capability when using my manual tubes with my Nikons.

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Why wont my Nikon af nikkor 70-300mm G lens autofocus its self with my D5000 camera


The D5000 does not have a focus motor in the body, relying on the lens to have one. The old 70-300mm G lens does not have a focus motor, relying on the camera to have one. Thus, this combination will not autofocus.
The newer 70-300mm AF-S G lens, as well as the even newer 70-300mm VR AF-S lens, do have the autofocus motor and thus will autofocus on the D5000.

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The auto focus does not work properly with this lens on either my Nikon D5000 or D7000. I have tried all possible combinations of AF settings. Typicaly, when I use single point to focus, the subject I...


Hi, It wouldn't autofocus on the D5000 as the body doesn't have an auto focus motor in the body and since that lens is AF, not AF-S, it won't autofocus. It should autofocus on the D7000 though, how far away are you from the object you're trying to photograph?

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I have a 35mm film Nikon camera with Quantaray NF AF Lenses. I'd like to find an affordable digital camera that I can still use these lenses, any suggestions ?


Those lenses will fit on every Nikon digital SLR. However, the autofocus will only work on cameras with an autofocus motor, the the AF will not work on the D40, D40x, D60, D3000, D3100, D5000, and D5100. Note that this is just the focusing: if you're willing to focus manually then those lenses will work perfectly well on those cameras.

Due to the smaller image sensor of most digital cameras, the lenses will act as if they were about 1.5 times longer. Thus a 50mm lens on a digital camera will give about the same field of view as a 75mm lens would on a film camera. This applies to all Nikon dSLRs except for the D3 family and the D700, which behave in this respect like a 35mm film camera.

You have to decide what's affordable for you, balancing such factors as weight, ease-of-use, and of course cost.

You can see the current Nikon lineup at
http://www.nikonusa.com/Nikon-Products/Digital-SLR-Cameras/index.page

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The QTB 7500A will work with the D90. However, you will not be able to use the iTTL mode of the D90. Use it exactly the same way you've been using it with the N80, letting the flash control the exposure.

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I have a Nikon N80. I want to get a D5000. I have two Quantaray lenses for the N80. One is a 28-80mm af the other is a 70-300 af.I would like to know if the lenses will work. I know I will have no auto...


Yes, they will work. As you pointed out, they will not autofocus, but everything else will work, most importantly the exposure metering.

Bear in mind that the D5000 sensor is smaller than a frame of 35mm film. The lenses will seem longer on the D5000, about the equivalent of 42-120mm and 105-450mm. This means that the shorter lens won't really be a wide-angle anymore, though the longer lens will now be a whopping telephoto.

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Yes and no. I assume the lens is of more or less the same vintage as the N75? If so, the lens will fit onto the D5000. All of the camera's exposure and metering modes will work properly. However the lens lacks an interal focus motor and thus will not autofocus on the D5000. You can focus manually, and the green focus indicator in the viewfinder will continue to work.

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Will this lens (the Quantaray AF70-300) fit my new Nikon D5000? is there an adaptor lens if not? thank you.


It depends on the mount. Quantaray lenses are available for a wide variety of mounts. If you specifically buy the one with the Nikon mount, then it will work. If you buy one with, say a Canon mount, then it won't fit.

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Yes, with caveats. The autofocus won't work on D40/D60/D3000/D5000. The metering may not work in all modes on all cameras. Since you didn't specify which camera, I can't give you a better answer than that.

I have 30-year-old Nikon lenses working fine on my D90, but without metering. And the old lenses date before the invention of autofocus.

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1 Answer

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