{"id":659,"date":"2015-05-21T16:39:28","date_gmt":"2015-05-21T14:39:28","guid":{"rendered":"http:\/\/eskerahn.dk\/?p=659"},"modified":"2018-10-23T17:41:19","modified_gmt":"2018-10-23T15:41:19","slug":"digital-camera-sensor-sizes-selling-elastic-bands-by-the-metre","status":"publish","type":"post","link":"https:\/\/eskerahn.dk\/?p=659","title":{"rendered":"Digital camera sensor sizes – selling elastic bands by the metre"},"content":{"rendered":"

When a sensor is advertised\/sold as 1\/2.3″ most people would think that is the diagonal of the sensor. Well it is NOT! It might even vary drastically between manufacturers.<\/p>\n

For historical reasons the diameter of a fictitious Vidicon tube with the same active area is what is advertised!!<\/p>\n

\"ccdsizes[1]\"<\/a>
\nFrom\u00a0 http:\/\/www.dpreview.com\/news\/0210\/02100402sensorsizes.asp<\/a><\/p>\n

Unfortunately, it is even more<\/strong> confusing than that…<\/p>\n

<\/p>\n

The same article also has a table, that I have expanded with two ratio columns. Some intermediate rows also added (data via wiki<\/span><\/a>).
\n(And removed some columns to make it less confusing)<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Sensor<\/strong><\/td>\nAsp<\/strong><\/td>\nWidth<\/strong><\/td>\nHight<\/strong><\/td>\nx*Full<\/strong><\/td>\nFactor adver. to real diag.<\/strong><\/td>\n<\/tr>\n
1\/3.6\u2033<\/td>\n4:3<\/td>\n4.000<\/td>\n3.000<\/td>\n1\/72.0<\/td>\n0.71<\/td>\n<\/tr>\n
1\/3.2\u2033<\/td>\n4:3<\/td>\n4.536<\/td>\n3.416<\/td>\n1\/55.8<\/td>\n0.72<\/td>\n<\/tr>\n
1\/3\u2033<\/td>\n4:3<\/td>\n4.800<\/td>\n3.600<\/td>\n1\/50.0<\/td>\n0.71<\/td>\n<\/tr>\n
1\/2.7\u2033<\/td>\n4:3<\/td>\n5.270<\/td>\n3.960<\/td>\n1\/41.4<\/td>\n0.70<\/td>\n<\/tr>\n
1\/2.5\u2033<\/td>\n4:3<\/td>\n5.760<\/td>\n4.290<\/td>\n1\/35.0<\/td>\n0.71<\/td>\n<\/tr>\n
1\/2.3\u2033<\/td>\n4:3<\/td>\n6.160<\/td>\n4.620<\/td>\n1\/30.4<\/td>\n0.70<\/td>\n<\/tr>\n
1\/2\u2033<\/td>\n4:3<\/td>\n6.400<\/td>\n4.800<\/td>\n1\/28.1<\/td>\n0.63<\/td>\n<\/tr>\n
1\/1.8\u2033<\/td>\n4:3<\/td>\n7.176<\/td>\n5.319<\/td>\n1\/22.6<\/td>\n0.63<\/td>\n<\/tr>\n
1\/1.7\u2033<\/td>\n4:3<\/td>\n7.600<\/td>\n5.700<\/td>\n1\/19.9<\/td>\n0.64<\/td>\n<\/tr>\n
1\/1.6\u2033<\/td>\n4:3<\/td>\n8.080<\/td>\n6.010<\/td>\n1\/17.6<\/td>\n0.63<\/td>\n<\/tr>\n
1\/1.5\u2033<\/td>\n4:3<\/td>\n8.800<\/td>\n6.600<\/td>\n1\/14.9<\/td>\n0.65<\/td>\n<\/tr>\n
1\/1.2\u2033<\/td>\n4:3<\/td>\n11.000<\/td>\n8.250<\/td>\n1\/9.53<\/td>\n0.65<\/td>\n<\/tr>\n
CX<\/td>\n3:2<\/td>\n13.200<\/td>\n8.800<\/td>\n1\/7.44<\/td>\n<\/td>\n<\/tr>\n
1\u2033<\/td>\n4:3<\/td>\n12.800<\/td>\n9.600<\/td>\n1\/7.03<\/td>\n0.63<\/td>\n<\/tr>\n
\u03bc4\/3<\/td>\n4:3<\/td>\n17.300<\/td>\n13.000<\/td>\n1\/3.84<\/td>\n<\/td>\n<\/tr>\n
4\/3\u2033<\/td>\n4:3<\/td>\n18.000<\/td>\n13.500<\/td>\n1\/3.56<\/td>\n0.66<\/td>\n<\/tr>\n
APS-C<\/td>\n3:2<\/td>\n25.100<\/td>\n16.700<\/td>\n1\/2.06<\/td>\n<\/td>\n<\/tr>\n
APS-H<\/td>\n13:9<\/td>\n29.200<\/td>\n20.200<\/td>\n1\/1.46<\/td>\n<\/td>\n<\/tr>\n
35 mm<\/td>\n3:2<\/td>\n36.000<\/td>\n24.000<\/td>\n1.000<\/td>\n<\/td>\n<\/tr>\n
645<\/td>\n4:3<\/td>\n56.000<\/td>\n41.500<\/td>\n2.690<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Note that the actual sensor diagonal is approximately<\/strong> 2\/3 (63% -72%) of the advertising figures!!<\/p>\n

A 1\/2 \u201csensor is thus effectively only about 1\/3\u2033 or 8mm<\/p>\n

But to add to the confusion factors vary<\/strong> between models and manufacturers!<\/p>\n

Examples<\/p>\n\n\n\n\n\n\n\n\n
Manufacturer \/ Model<\/strong><\/td>\nAdver.<\/strong><\/td>\nWidth(mm)<\/strong><\/td>\nHeight(mm)<\/strong><\/td>\nReal Diag.(mm)<\/strong><\/td>\nFactor adver. to real diag<\/strong><\/td>\n<\/tr>\n
FujiFilm \/ F50,60,100,200<\/td>\n1\/1.6″<\/td>\n8<\/td>\n6<\/td>\n10<\/td>\n0.63<\/td>\n<\/tr>\n
FujiFilm \/ F30, 31<\/td>\n1\/1.7″<\/td>\n7.44<\/td>\n5.58<\/td>\n9.3<\/td>\n0.62<\/td>\n<\/tr>\n
FujiFilm \/ F900<\/td>\n1\/2″<\/td>\n6.40<\/td>\n4.80<\/td>\n8.00<\/td>\n0.63<\/td>\n<\/tr>\n
Sony \/RX100<\/td>\n1″<\/td>\n13.2<\/td>\n8.8<\/td>\n15.9<\/td>\n0.63<\/td>\n<\/tr>\n
Sony \/ IMX220<\/a><\/td>\n1\/2.3″<\/td>\n6.30<\/td>\n4.72<\/td>\n7.87<\/td>\n0,71<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

So Sony’s sensor called 1\/2.3″ is only 1.6% less<\/span> in diagonal than what FujiFilm call 1\/2″ !!!
\nSaid otherwise Fuji could call Sony’s sensor a 1\/2.0<\/strong>3″, OR Sony could call Fuji’s 1\/2.26″<\/span><\/p>\n

So be REALLY careful when comparing sensor sizes that you look at the actual area in use<\/strong>!! – if you can get the correct info from the manufacturer!!!<\/p>\n

As the factor used can vary with as much as 14% (matching 30% in area) it is easy to make wrong assumptions, and many sites do, assuming that e.g. all sensors called 1\/2.3″ has the same actual size. There are NO reason to assume that – unfortunately…<\/p>\n

See also this post on the Megapixel craze<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

When a sensor is advertised\/sold as 1\/2.3″ most people would think that is the diagonal of the sensor. Well it is NOT! It might even vary drastically between manufacturers. For historical reasons the diameter of a fictitious Vidicon tube with the same active area is what is advertised!! From\u00a0 http:\/\/www.dpreview.com\/news\/0210\/02100402sensorsizes.asp Unfortunately, it is even more […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,6,5],"tags":[],"class_list":["post-659","post","type-post","status-publish","format-standard","hentry","category-compact-cameras","category-phonesphablets","category-resolution-and-noise"],"_links":{"self":[{"href":"https:\/\/eskerahn.dk\/index.php?rest_route=\/wp\/v2\/posts\/659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eskerahn.dk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eskerahn.dk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eskerahn.dk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/eskerahn.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=659"}],"version-history":[{"count":8,"href":"https:\/\/eskerahn.dk\/index.php?rest_route=\/wp\/v2\/posts\/659\/revisions"}],"predecessor-version":[{"id":2675,"href":"https:\/\/eskerahn.dk\/index.php?rest_route=\/wp\/v2\/posts\/659\/revisions\/2675"}],"wp:attachment":[{"href":"https:\/\/eskerahn.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eskerahn.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eskerahn.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}