Tag: EF

Canon EF lens 28-90mm

As the listing stated:

Canon EF 28-90mm Lens Working Then Produces Err99. Reduced to sell at a bargain price will be easy fix

EBay
Canon EF lens 28-90mm

The dreaded err99. It’s a general error code that seems to annoy many Canon owners, and can be a simple fix or a tedious one. I wonder what it will be for me? I’ve seen a good article on Improve Photography’s website that explains some of the steps that can be taken to remedy this error, you can read that article HERE.

I now have the lens in front of me so here is what I can see. Overall the lens is in good order for its age and mounts to the camera ok. All manual focus and zoom works and the lens is clean with no sign of fungus or haze so I’m happy with that. I’m still waiting for the camera battery to arrive so I can’t really comment yet on the error code. I’m not cleaning anything just yet as I want to see for myself if the error shows on one of my cameras, if it does then i’ll start the process of cleaning the contacts which is what I would of attempted first off.

The battery has now arrived and I have now commenced further testing. I have placed it into auto mode and all seems well. I have tried the lens in 4 different camera bodies and have had no sign of the Err99 error code. The only issue I have noticed that may not be contributed to the lens is that when connected to an Eos5 body there is a fair drop in battery power. Again this has been noted in the past as something than can be connected to dirty contacts on the lens, so as a precautionary measure I shall be using some IPA and a fibre glass scratch pen to clean those up.

Using a fibre glass scratch pen

I’m unable to recreate the advertised fault as everything about this lens is working fine as far as I can see. I’m going to wrap this one up as complete now.

I’ve really enjoyed working on these two cheap damaged lenses that I originally purchased just to test my old SLR kit. They are now both working fine and i believe the invested effort shows in the end result.

I am extremely happy.

Thanks for passing by.

Canon EF lens 35-80mm

As the listing stated:

Needs opening cleaning and fixing sounds like something loose so selling as a repair project cheap.

EBay
Canon EF lens 35-80mm

No error code so in theory this should be an easier fix, however the fact that something is moving about inside tells me there could be more wrong with it than expected.

I now have the lens in front of me so here is what I can see.

Shake rattle and roll

Well, it certainly does rattle, something quite significant is moving about inside. When Connected to a camera you can’t focus or zoom so something in there is restricting movement. There is also fungus on the lens so this one will need to be carefully dismantled and cleaned throughout.

Fungus in the rear of lens
Fungus from front of lens

About 10 small screws later I am into the internal parts of the lens and the cause of all the rattling becomes apparent. A piece of the internal zoom mechanism has broken off stopping the zoom from smoothly operating through its range.

The piece that was broken

The part of the barrel that the item had snapped off was broken due to forceful action with the previous owner. There are two options here, junk the lens or see if it can be saved, I went for the latter. I mixed some epoxy resin and fixed the piece back into place also gluing it to a part of the mechanism that was not liable to hinder future movements. I left this for a couple of hours to cure.

Epoxy resin and wait
Lens internals

Whilst waiting for the glue to cure I used a mixture of water and hydrogen peroxide to clean all the lens elements. I thoroughly dried them and gave a quick polish and reassembled them into the casing. The glue was dry now so I was careful to reassemble the lens not damaging any ribbon cables or contacts along the way. The lens looks lovely and clear of any fungus now.

Fungus gone front
Fungus gone rear

I’ve put the lens onto a test camera and it’s fantastic. I couldn’t get focus when I unpacked the lens but now I have the full range of action and a lovely clean working lens for very little outlay and probably just 2 to 3 hrs of maintenance. Well worth it in my opinion. I wanted a good cheap lens to test my old stock and I now have one that I can easily sell on at some point, on top of that I’ve learnt a lot from working on one of these lenses. I’m certainly going to attempt working on more in the future.

Perfectly good working lens

Thanks for passing by. Always appreciated.