AF-D to AF-S adapter

a1dennis

New member
I have Sigma 135-400 afd lens. I was wondering if there is an adapter for the d5000 that will make the auto focus work?

Thanks

Dennis
 

Yan Lauzon

Senior Member
I am surprised nobody came out with an af-d / af-s adapter, that would include a motor. It seems to me this wouldn't be impossible to do and I'd think it would sell.

If such an adapter exists, please point me to the right direction!!!
 

Bikerbrent

Senior Member
Welcome aboard. Enjoy the ride.
We look forward to seeing more posts and samples of your work.

Frankly, you could probably find a used D7000 thru D7200 which would give you a better camera and the ability to autofocus your lens for less than such an adapter could be made.
 

480sparky

Senior Member
In order to create an AF-S lens, you must put a focus motor IN THE LENS.

The S stands for Silent Wave Motor. And said lens must communicate with the camera body..... wiring that does not exist in AF-D lenses.

In short, you'd have to remanufacture the lens from the ground up.
 
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hark

Administrator
Staff member
Super Mod
Contributor
I honestly don't think it would do a good job. What would happen is the lens would sit further away from the sensor. That would pose additional problems and most likely alter the focal length of the lens. AF-D lenses can be used on bodies that lack the focus motor; however, it means having to manually focus.
 

Yan Lauzon

Senior Member
I honestly don't think it would do a good job. What would happen is the lens would sit further away from the sensor. That would pose additional problems and most likely alter the focal length of the lens. AF-D lenses can be used on bodies that lack the focus motor; however, it means having to manually focus.
People who uses one company's lens on another company's camera, with mount adapters, how do they resolve these issues?
 

480sparky

Senior Member
People who uses one company's lens on another company's camera, with mount adapters, how do they resolve these issues?

Such adapters are basically a kludge. They function, but are clunky. Not only are the mechanics a nightmare, but if you move a lens away from the camera, you affect the focusing of the lens. The only way to alter that is to introduce glass into the adapter........... which usually degrades the image quality significantly.
 

hark

Administrator
Staff member
Super Mod
Contributor
People who uses one company's lens on another company's camera, with mount adapters, how do they resolve these issues?

Such adapters are basically a kludge. They function, but are clunky. Not only are the mechanics a nightmare, but if you move a lens away from the camera, you affect the focusing of the lens. The only way to alter that is to introduce glass into the adapter........... which usually degrades the image quality significantly.

I haven't tried out a mount adapter but suspect that including a motor into some type of adapter would take up much more room than an adapter that allows one brand of lens to be used on a different brand body. And that would mean the adapter would have more depth to it causing the lens to be further away from the sensor.

Personally I would prefer to see the camera bodies have the motors and the lenses to be made without them. Lenses tend to be kept longer than bodies, but it's one more thing that can malfunction.
 

Yan Lauzon

Senior Member
I haven't tried out a mount adapter but suspect that including a motor into some type of adapter would take up much more room than an adapter that allows one brand of lens to be used on a different brand body. And that would mean the adapter would have more depth to it causing the lens to be further away from the sensor.

Personally I would prefer to see the camera bodies have the motors and the lenses to be made without them. Lenses tend to be kept longer than bodies, but it's one more thing that can malfunction.
That makes sense. But my current body is motorless ...
 

Yan Lauzon

Senior Member
Then you either use AF-S lenses (and/or their third-party equivalents), focus manually or upgrade to a more sophisticated camera body.

Those are the options.
I'm OK to do manual focus and would be happy to invest on lens that will last longer than my current body, but I am still confused as to what's what... Are most af-d lens full frame?
I see full frame lens as a worthy investment...
 
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