I have numerous Canon FD lenses that the Aperature does not work on. How do I go about repairing them. One is a FD 28mm 1:2.8 SC

you will more then likely need one but before you buy go back to the store you bought it from and see what they say

Yes.

If the lens is an FD mount then it won't fit an EF camera and visa versa. You can buy an adapter to mount FD lenses on EF camera.

Canon FD lenses date back to before the mid 1980's. They use a totally different mounting system to the later EOS mount which was a redesign to suit the needs of auto-focussing.

Unfortunately they are chalk and cheese: you cannot realistically fit an FD lens to an EOS camera.

Your fix is to sell the lens and to buy one with an EOS mount.

The FD lenses were mainly for film cameras. I used this lens on a Canon AE1-P. If you have a modern digital EOS with an EF mount you can buy an adapter (FD to EF) so the FD lens can be used on the EOS

Press down the small button to the right on the green A and twist the f stop ring. This button locks the lens on A

For what you can buy them for these days, they're excellent and were usually made by Kiron who made excellent lenses in their own name and also for Tokina and Vivitar.

But unless you're using a full frame Nikon (i.e. 35mm or the full frame digital professional bodies) then it's nothing special as it has the same angle of view as a 31.5mm lens (close enough to a 28mm for discussion purposes). A 28mm f3.8 offers no advantage over many of the kit zoom lenses which come with many Nikons and with the huge advances in optical design since the 21mm Vivitar was made are likely to be optically superior.

On balance, if your Nikon is a 35mm film SLR or a full frame sensor version then go for it as it's a fantastic super-wide angle lens. With anything else, it simply doesn't make much sense. What it will still do though is offer fantastic depth of field which will be lacking in relative terms on a 28mm lens designed for APS-C sensors.

The Canon lenses are FD mount which means that you will need to get an adaptor to convert the FD mount to fit the F mount on the Nikon. An example of the mount can be seen here:

http://www.rugift.com/photocameras/canon-fd-nikon-adapter.htm

As for the speedlights the hotshoe mount will accept them on your Nikon, put them on with fresh batteries and try them out.

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Answer to your question is, ‘Yes’ we can. Use Sigma FD lenses.

As we know Canon AV-1 has electronically controlled AE (Automatic Exposure) & has a Canon Breech-lock lens mount.

Original generation of FD lenses featured a silver locking ring at the base. Only that locking ring turns to lock the lens to the camera body; the lens body remains still.

In the newer lens system which was introduced with this camera, the user has to line up the red dot on the lens, with the red dot on the camera and simply turned the whole lens clockwise until it clicked into place.

Note: FD-mount cameras could use FL lenses in stop-down metering mode.

Thank you & have a nice day.

Warm regards,
William

Bob, there are several reasons why this won't work, mainly cost

An older manual focus wide angle will work in the manual mode on a D50. The can be had very cheap on eBay and the like.

Converting one that has a Canon FD mount to a Nikon is possible, but you would need one with a Nikon mount for parts. The focal plane distances are different between Nikon and Canon. An adapter for this is not possible without adding optics to compensate

Kevin