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Glenn Middleton

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Posted on Tuesday, April 18, 2006 - 04:27 pm:   

Ben,

The two rings are different, but only in one detail - the rear 'skirt on the 1.4 ring extends further rearwards than the 1.8 item. This is because the 1.4 lens extends further when close focused. You will thus have a gap between the forward edge of focus ring and rear of filter ring at min focus.

Do you have access to a small lathe? It is possible to combine the rear of the original 1.4 ring with the front of the 1.8 ring and produce a repair that is hardly noticeable. The rings are 'T' rings in original state. By turning damaged filter threads off 1.4 item and the too short skirt off 1.8 item, you produce two handed 'L' rings that can be retained on the lens by the original screws.

Done this a couple of times on filter rings that had split due to poor dent removal techniques. Suitable donor lenses are dirt cheap and when you picked up the damaged lens at a bargain price, the result can produce a good profit if you sell it on.

Glenn

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