{"id":33961,"date":"2026-04-18T01:03:34","date_gmt":"2026-04-18T05:03:34","guid":{"rendered":"https:\/\/phsc.ca\/camera\/?p=33961"},"modified":"2026-04-13T21:37:52","modified_gmt":"2026-04-14T01:37:52","slug":"holy-zeiss-batman","status":"publish","type":"post","link":"https:\/\/phsc.ca\/camera\/holy-zeiss-batman\/","title":{"rendered":"holy Zeiss, Batman …"},"content":{"rendered":"
\"\"<\/a>

an old Zeiss Tessar lens made by E Krauss in Paris, France<\/p><\/div>\n

Toronto<\/strong>. … said Robin<\/a>. Discerning camera collectors realize that Zeiss sometimes licensed its designs outside Germany to avoid tariffs – and possibly expand manufacturing capacity in the short term for photographic products.<\/p>\n

The quarter (0.25 cents) sized Tessar F 35 f\/3.5 lens at left was manufactured \u00a0in Paris by the E Krauss<\/a> firm under license. This lens is relatively tiny with a strange (to photographers) thread. The thread is actually an RMS (Royal Microscopical Society<\/a>) standard. The RMS established the standard around 1858.<\/p>\n

Before the RMS thread<\/a>, microscope makers used proprietary threads to prevent objectives (lenses) from others to be mounted on their stands – not unlike the variation in camera lens mount designs throughout photography’s brief history.<\/p>\n

The intent of this and similar RMS threaded lenses was to allow closeup photography through a microscope. Regular objectives have no aperture adjustment and are used wide open with the viewer ‘scanning’ back and forth to put various layers of the subject in focus.<\/p>\n

These tiny lenses have an aperture setting to allow the subject depth of field to be adjusted . \u00a0So If you should spot a tiny lens with a funny thread and a diaphragm, it may be intended for use on a microscope.<\/p>\n

Our 2026 events are rolling out with the spring auction (May 3rd) and spring fair (May 24th) up next. The events have a poster that will be pinned a top this site close to each event date. While we can’t say you will find a tiny lens like this, we can say you will find many items to add to your collection\/user gear.<\/p>\n","protected":false},"excerpt":{"rendered":"

Toronto. … said Robin. Discerning camera collectors realize that Zeiss sometimes licensed its designs outside Germany to avoid tariffs – and possibly expand manufacturing capacity in the short term for photographic products. The quarter (0.25 cents) sized Tessar F 35 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[500,34,286,279,220,348],"class_list":["post-33961","post","type-post","status-publish","format-standard","hentry","category-events","tag-accessories","tag-cameras","tag-darkroom","tag-lenses","tag-photos","tag-studio"],"_links":{"self":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/33961","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/comments?post=33961"}],"version-history":[{"count":3,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/33961\/revisions"}],"predecessor-version":[{"id":33965,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/33961\/revisions\/33965"}],"wp:attachment":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/media?parent=33961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/categories?post=33961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/tags?post=33961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}