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My notability tag was removed, and more marginal sources added, to support this concept, which is not even a WP:NEO, since nobody calls it that, but is a recent concept sometimes invoked.
The source that I removed saying it derived from wikipedia ( [1]) uses the phrasing "Reproduction ratio in the camera in 35mm equivalents is" (what it has from WP is only "According to Wikipedia, (2011), digital macro photography means a total magnification of at least life size on a 150x100mm print", which makes it suspect, but perhaps doesn't rule it out as a source of other bits; but it's a self-published page, so probably not really at the threshold of WP:RS.
The sources added starting at this diff are to uses, but no explicit discussion. 1 says "Maximum magnification 1.0x (2.0x 35mm equivalent)"; 2 says "With its 0.52x magnification, the 50mm is equivalent to 1:1 in the 35mm format; the 35mm is equivalent to 2:1, or two times life-size." 3 (later 4) is a forum discussion arguing about the concept, where a guy says " I personally call it '35mm equivalent magnification'. A '1:1 35mm equivalent' would be 36x24 regardless of the camera used to shoot it." (so I guess that's where our title derives from). New 3 says "Pair it with the EX-25 extension tube, and you get the 35mm-equivalent magnification of 2x".
The term "35mm Equivalent Magnification" is used in the latest ref 4 (PhotographyBLOG).
I don't deny that it's a somewhat useful concept, but there doesn't seem to be anything written on it that we can base an article on, if you discount the forum argument, which is the only place it has been discussed as a concept. It's not at all clear that it will catch on as a spec (as opposed to, say, the "magnification to 150x100 print", which drops the 35mm format that is becoming increasingly irrelevant to modern digital photographers).
And if we decide we need an article on it, we should try to make a title that at least sort of respects the WP:MOS.
I'll put that tag back and give others a chance to look for sources. Dicklyon ( talk) 15:58, 11 June 2012 (UTC)
"I agree with the idea in your quote "The term magnification or reproduction ratio, such as 1:1 magnification or 1:10 magnification, will crop up with an alarmingly high occurrence within this article", but that says nothing about the "35 mm equivalent" for such a term." I never said it did. That quote was merely to demonstrate that "reproduction ratio" and "magnification" are synonymous. I wasn't using the nikonians.org as a reference in the article
"I've been known to use "35 mm equivalent ISO speed" and "35 mm equivalent f-number", too, but that doesn't mean I can write WP articles on them." There are no manufacturers using those terms, while Olympus and Panasonic and perhaps other lens manufacturers are using the term "35mm equivalent magnification" consistently now in defining macro lens magnification for small format cameras. Whether it's a good idea or not is arguable, but they are using it.
"mentions in a few datasheets are pretty marginal" It's more than just few datasheets. The term is showing up increasingly on many more lens descriptions that I haven't cited. How many are required to make it a "notable" term? Here are some more: http://www.pixalo.com/reviews/showproduct.php/product/425 "It offers a magnification of 1:2 (half life size), which has an image magnification size equivalent to life size (1:1) in a 35mm film photo."
http://vantung.smugmug.com/By-Categories/By-Classifications/Macro/17849441_8s4nhs#!i=1364987165&k=wBMcG9H "Macro Photography has many definitions. To me, it has nothing to do with distance but magnification. If one can magnify a subject to very large size then it doesn't matter how close the photographer is to the subject. It is very difficult to decipher such information from a photo. I use a minimum 35mm equivalent magnification of 1:2 (i.e. half life size on FF camera) to qualify a picture as being "macro", as compared to just "close up".
http://www.harpersphoto.co.uk/product/olympus_35mm_f3_5_macro_zuiko/ "It is extremely compact and the world's lightest macro lens. It offers a magnification of 1:1 life size which has an image magnification size equivalent to 2:1 in a 35mm film camera"
http://www.olympus.co.uk/consumer/dslr_ZUIKO_DIGITAL_ED_50mm_1_2_0_Macro_Specifications.htm "Specifications for the ZUIKO DIGITAL ED 50mm 1:2.0 Macro: 35mm Equivalent Magnification 1.04x "
http://www.olympusamerica.com/crm/oneoffpages/crm_e_macro.asp "This lens will focus down to a 1x magnification ratio. The 35mm equivalent is a 2x magnification ratio"
I have compared these to the references in the articles "35 mm equivalent focal length" and "crop factor", both of which are similar concepts, and the sparse references in those articles don't seem any more detailed than these. Either those articles need more/better citing or you're using higher standards than the creators of those articles were given. DSiegfried ( talk) 10:50, 12 June 2012 (UTC)
Shouldn't those articles be cited properly then? In the meantime while this discussion is taking place, I would like to move this to "35mm equivalent magnification" since that seems to be the most common usage. DSiegfried ( talk) 21:27, 12 June 2012 (UTC)
Since the name is malformed and not the most common usage I think it would be better to move it. DSiegfried ( talk) 22:41, 12 June 2012 (UTC)
![]() | This redirect does not require a rating on Wikipedia's content assessment scale. |
My notability tag was removed, and more marginal sources added, to support this concept, which is not even a WP:NEO, since nobody calls it that, but is a recent concept sometimes invoked.
The source that I removed saying it derived from wikipedia ( [1]) uses the phrasing "Reproduction ratio in the camera in 35mm equivalents is" (what it has from WP is only "According to Wikipedia, (2011), digital macro photography means a total magnification of at least life size on a 150x100mm print", which makes it suspect, but perhaps doesn't rule it out as a source of other bits; but it's a self-published page, so probably not really at the threshold of WP:RS.
The sources added starting at this diff are to uses, but no explicit discussion. 1 says "Maximum magnification 1.0x (2.0x 35mm equivalent)"; 2 says "With its 0.52x magnification, the 50mm is equivalent to 1:1 in the 35mm format; the 35mm is equivalent to 2:1, or two times life-size." 3 (later 4) is a forum discussion arguing about the concept, where a guy says " I personally call it '35mm equivalent magnification'. A '1:1 35mm equivalent' would be 36x24 regardless of the camera used to shoot it." (so I guess that's where our title derives from). New 3 says "Pair it with the EX-25 extension tube, and you get the 35mm-equivalent magnification of 2x".
The term "35mm Equivalent Magnification" is used in the latest ref 4 (PhotographyBLOG).
I don't deny that it's a somewhat useful concept, but there doesn't seem to be anything written on it that we can base an article on, if you discount the forum argument, which is the only place it has been discussed as a concept. It's not at all clear that it will catch on as a spec (as opposed to, say, the "magnification to 150x100 print", which drops the 35mm format that is becoming increasingly irrelevant to modern digital photographers).
And if we decide we need an article on it, we should try to make a title that at least sort of respects the WP:MOS.
I'll put that tag back and give others a chance to look for sources. Dicklyon ( talk) 15:58, 11 June 2012 (UTC)
"I agree with the idea in your quote "The term magnification or reproduction ratio, such as 1:1 magnification or 1:10 magnification, will crop up with an alarmingly high occurrence within this article", but that says nothing about the "35 mm equivalent" for such a term." I never said it did. That quote was merely to demonstrate that "reproduction ratio" and "magnification" are synonymous. I wasn't using the nikonians.org as a reference in the article
"I've been known to use "35 mm equivalent ISO speed" and "35 mm equivalent f-number", too, but that doesn't mean I can write WP articles on them." There are no manufacturers using those terms, while Olympus and Panasonic and perhaps other lens manufacturers are using the term "35mm equivalent magnification" consistently now in defining macro lens magnification for small format cameras. Whether it's a good idea or not is arguable, but they are using it.
"mentions in a few datasheets are pretty marginal" It's more than just few datasheets. The term is showing up increasingly on many more lens descriptions that I haven't cited. How many are required to make it a "notable" term? Here are some more: http://www.pixalo.com/reviews/showproduct.php/product/425 "It offers a magnification of 1:2 (half life size), which has an image magnification size equivalent to life size (1:1) in a 35mm film photo."
http://vantung.smugmug.com/By-Categories/By-Classifications/Macro/17849441_8s4nhs#!i=1364987165&k=wBMcG9H "Macro Photography has many definitions. To me, it has nothing to do with distance but magnification. If one can magnify a subject to very large size then it doesn't matter how close the photographer is to the subject. It is very difficult to decipher such information from a photo. I use a minimum 35mm equivalent magnification of 1:2 (i.e. half life size on FF camera) to qualify a picture as being "macro", as compared to just "close up".
http://www.harpersphoto.co.uk/product/olympus_35mm_f3_5_macro_zuiko/ "It is extremely compact and the world's lightest macro lens. It offers a magnification of 1:1 life size which has an image magnification size equivalent to 2:1 in a 35mm film camera"
http://www.olympus.co.uk/consumer/dslr_ZUIKO_DIGITAL_ED_50mm_1_2_0_Macro_Specifications.htm "Specifications for the ZUIKO DIGITAL ED 50mm 1:2.0 Macro: 35mm Equivalent Magnification 1.04x "
http://www.olympusamerica.com/crm/oneoffpages/crm_e_macro.asp "This lens will focus down to a 1x magnification ratio. The 35mm equivalent is a 2x magnification ratio"
I have compared these to the references in the articles "35 mm equivalent focal length" and "crop factor", both of which are similar concepts, and the sparse references in those articles don't seem any more detailed than these. Either those articles need more/better citing or you're using higher standards than the creators of those articles were given. DSiegfried ( talk) 10:50, 12 June 2012 (UTC)
Shouldn't those articles be cited properly then? In the meantime while this discussion is taking place, I would like to move this to "35mm equivalent magnification" since that seems to be the most common usage. DSiegfried ( talk) 21:27, 12 June 2012 (UTC)
Since the name is malformed and not the most common usage I think it would be better to move it. DSiegfried ( talk) 22:41, 12 June 2012 (UTC)