Wikipedia:Featured picture candidates/Yellowing of thorium lenses

Yellowing of thorium lenses

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

• Support as nominator – Pine^✉ 18:29, 21 January 2016 (UTC)
• Support The lens bodies themselves are a little dusty and worn - but that's kind of a given for seeing the phenomenon. Informative and clear. Adam Cuerden ^(talk) 20:07, 21 January 2016 (UTC)
• Support – Yann (talk) 20:58, 21 January 2016 (UTC)
• Comment – Nit — Lenses, not being sentient beings, can't "experience" anything. (Also, on my screen, the yellowing of the lens at far right isn't readily apparent.) Sca (talk) 22:01, 21 January 2016 (UTC)
  • In most dictionaries "experience" can mean "encounter or undergo" applying to non-sentient entities. Also the lens on the far right (according to the file description) shows no signs of yellowing for comparison. Maybe the caption could be improved to indicate this? - Wolftick (talk) 22:41, 21 January 2016 (UTC)

Undergo does not imply consciousness; experience does. Sca (talk) 00:56, 22 January 2016 (UTC)

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)

• Support - Interesting. I'd never heard of this. — Chris Woodrich (talk) 00:37, 22 January 2016 (UTC)
• Support – good addition to the category. Bammesk (talk) 01:44, 22 January 2016 (UTC)
• Support, per my !vote at Commons. Daniel Case (talk) 04:38, 25 January 2016 (UTC)
• Support, an educational photo. dllu (t,c) 22:32, 25 January 2016 (UTC)
• Support – Jobas (talk) 22:05, 28 January 2016 (UTC)

Promoted File:Yellowing of thorium lenses.jpg --Armbrust ^{The Homunculus} 18:30, 31 January 2016 (UTC)