Hi, I'm sure it's been discussed here before but only found one discussion on this subject. The 24/2.8 I bought has a stiff focus ring. Is it hard to DYI? Do I have to take it completely apart to fix it? Is it worth fixing? I really like this focal length and it produces clean and sharp images. Is there a document somewhere that explains how to?
I'm in the Montreal area, does anyone know of a few places that would fix this lens?
I have cleaned & lube a 21mm very similar to the 24 - it's a very simple lens and easy to work on if you have the correct tools - a spanner type wrench to remove the front face plate - and basic mechanical assembly experience.
If you are not feeling or hearing a grinding like action in the rotation - like a dry catching action or like sand in the threads - try first to warm the lens up a little with a hair dryer - not too hot! - and just work the focus ring back & forth for several minutes - and do that several times. Sometimes the old lubricant can be re-worked into place.
Let me know if you decide to open it - I could try to walk you through the steps. You can fabricate a spanner with a block of wood, fine hardened paneling nails and a file. Here is a link to a spanner but you can also find them for $15 or so. Take a look at your lens face plate - there are two little holes on the outer edge - if I remember correctly the Oly has very small ones on the very outside edge - you need to rotate that face plate and unscrew it up that threaded barrel.
I found it real easy to clean and re-lube my 24/2.8, documenting the tear down is critical in avoiding issues when putting her back together again.
And the right tools do help a lot.
Geez, you guys make me want to try it. I used to take things apart alot, I worked as a technician in electronics for years. I guess documenting is the key to taking it back to its original state. I will certainly try the hair dryer thing first.
Marking the alignment point on the front and rear barrel is the most critical part. If you get stuck, get in touch with John Hermanson at Zuiko.com. He's the best.
