If you have one of these lenses, a Canon 70mm – 200mm f4, then you will know that they fail after a few years. The manual focus will seem disconnected from the focusing glass inside, while the auto-focus works annoyingly well. I bought mine secondhand from eBay and I remember it was slipping very slightly then, about three years ago. It got progressively worse since then. Now it’s completely useless as a manual lens!

Video on how to fix a Canon 70mm 200mm f4 Lens

So watch out if you are buying one from eBay or a second hand camera shop. But if you do happen to have one and you need it to work in MANUAL ONLY then here is a very simple fix that turns it into an even more amazing lens than before! At NO cost to you. You do have to be a little daring but here I walk you through the process of mending it and then at the end of the video I show you just how to put it back to it’s previous condition.

Now every photographer or cameraperson with one of these Canon lenses will be able to do their own repair, simply, cheaply and most effectively using an everyday object (you could be wearing one now.) Watch the video and find out the cunning secret that I have discovered actually works!

This fix is AWSOME!

You will end up with a lens that is even more useful manually as it now will have two settings. Let me explain because this is soooo awsome! if you turn the focussing ring clockwise to the right towards infinity untill it becomes stiff and difficult to turn it will now be in a special NEVER before seen, brand new mode of operation. When its in this mode cou can focus the lens swiftly and accurately between near and far, from the closest 1.2 meters all the way to infinity in just a 1/4 turn of the focussing ring!

And back to normal again!

To put it back to it’s original maual feel which is a half turn, “geared” feel, couldn’t be more simple. Just turn the focussing ring anticlockwise or to the left, from infinity towards 1.2 meters or 4 feet. Keep turning the lens and it will glide into the middle of a “soft” area where it will be back to normal operation. Focussing will work as usual, in that it will feel “geared” and a 1/2 turn of the ring will have a more precise feel as it will travel faster than the focussing numbers in the distance window.

I know it sounds too good to be true (I myself was so surprised by this) but please watch the video and do the fix yourself if you don’t believe me.

Leave a comment below if you have managed this repair and let others know that it is a genuine fix and NOT a fake or scam. Now that I have saved you hundreds of pounds/dollars please consider a PayPal donation as I am self employed and grateful for all offerings. You don’t have to but I’m sure you will be dancing for joy to get this lens working again!

Just click the link and choose how much you think this information is worth to you and your brand new, better than before lens. Thank you for reading this far and good luck with the repair. All you will need is a small phillips screwdriver, two wooden skewers and a tiny bit of courage. Oh and the everyday secret object (you could be wearing one now) that will fix your lens, it’s all revealed in the video.

WARNING

This will change a Canon 70mm – 200mm f4 lens from an auto-focus to a NON auto-focus lens and will probably damage the focusing motor and or your camera if you attempt to use auto-focus again!!!!!! I taped my auto-focus switch into the OFF position with a piece of black electrical insulation tape and I recommend that you do the same. I hold NO responsibility for YOU damaging YOUR lens as this is information only, use it at your own risk.

If you have found this useful please leave a comment below for other readers who may not believe that this fix will actually work. Thank you again.

Tim