{"id":7930,"date":"2013-01-03T19:49:31","date_gmt":"2013-01-04T03:49:31","guid":{"rendered":"http:\/\/stormbruiser.com\/chase\/?p=7930"},"modified":"2013-01-03T20:06:02","modified_gmt":"2013-01-04T04:06:02","slug":"january-3-2013-how-sharp-is-that-lens","status":"publish","type":"post","link":"http:\/\/stormbruiser.com\/chase\/2013\/01\/03\/january-3-2013-how-sharp-is-that-lens\/","title":{"rendered":"January 3, 2013 How sharp is that lens?"},"content":{"rendered":"

Bruiser gave me a nice, used Zeiss 21mm 2.8 wide angle lens for Christmas, and Mr. Stormeffects was curious as to the sharpness in the corners.\u00a0 I put the lens on the 5D, stuck the camera on a tripod, and took a few shots out back.\u00a0 Here are some of them—-they are a little larger than normal to help those with decaying eyesight.<\/p>\n

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In image 9638, the bright star Capella is in the upper right.\u00a0 The following image (9638 upperright) is heavily cropped and shows Capella and the extreme upper right corner of 9638.\u00a0 This is where distortion would be greatest, and the Zeiss does a pretty good job here.\u00a0 The next image is the extreme upper left corner of image 9638.\u00a0 These are 15 to 30 second exposures, so there is a little bit of star trail evident.<\/p>\n

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Image info:<\/p>\n

9650 f3.2, 15 sec, ISO 800<\/p>\n

9641\u00a0 f3.2, 10 sec, ISO 800<\/p>\n

9643\u00a0 f2.8, 20 sec, ISO 1000<\/p>\n

9647\u00a0 f6.3, 20 sec, ISO 200<\/p>\n

9638\u00a0 f2.8, 15 sec, ISO 800<\/p>\n

9646 f6.3, 20 sec, ISO 200<\/p>\n

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Bruiser gave me a nice, used Zeiss 21mm 2.8 wide angle lens for Christmas, and Mr. Stormeffects was curious as to the sharpness in the… [Read More]<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[54],"tags":[],"class_list":{"0":"post-7930","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-54","7":"entry","8":"has-post-thumbnail"},"_links":{"self":[{"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/posts\/7930","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/comments?post=7930"}],"version-history":[{"count":4,"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/posts\/7930\/revisions"}],"predecessor-version":[{"id":7941,"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/posts\/7930\/revisions\/7941"}],"wp:attachment":[{"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/media?parent=7930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/categories?post=7930"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/stormbruiser.com\/chase\/wp-json\/wp\/v2\/tags?post=7930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}