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Wikipedia:Featured picture candidates/Yellowing of thorium lenses

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Voting period is over. Please don't add any new votes. Voting period ends on 31 Jan 2016 at 18:29:54 (UTC)

Original – "Some older photographic lenses were produced with glass elements containing small amounts of thorium. If stored in the dark for prolonged periods of time, these lenses can experience what is commonly called “yellowing”. While some photographers enjoy the effect the yellowed glass has on their photographs (it acts similar to a weak yellow filter), others prefer to reverse it by exposing the lens to a UV light source." The right lens is included for comparison and shows no signs of yellowing. -- description by User:El Grafo
Reason
Interesting illustration of this phenomenon. This is a "valued image" on Commons with a size of 4,734 × 1,702 pixels.
Articles in which this image appears
Thorium
FP category for this image
Wikipedia:Featured pictures/Photographic techniques, terms, and equipment
Creator
El Grafo
Undergo does not imply consciousness; experience does. Sca (talk) 00:56, 22 January 2016 (UTC)[reply]
Fair enough. I would say it's in fairly commonly (mis(?) :-) )used as a synonym for "undergo" for non-sentient things though. Your mileage may vary as to how important that is. OED has [with object] and "the company is experiencing difficulties" [1] but I'd agree undergo is better. - Wolftick (talk) 01:47, 22 January 2016 (UTC)[reply]

Promoted File:Yellowing of thorium lenses.jpg --Armbrust The Homunculus 18:30, 31 January 2016 (UTC)[reply]