Help finding a specific thread....


Liverpool / UK
A few weeks ago, I was reading a link contained in a thread, about the image quality of lenses (as someone on Ebay was asking it a lens had marks on it).

The web article started by scratching a lens.... then taking images to show results... the article progressed to more abuse on the lens to show just how much you could damage a lens, before the quality was impaired...

Been searching the forums for over an hour to re-read the article, but to no avail...

Does anyone remember it ???... and if so can you, point me in the right direction

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