Comments on: About the numbers on the Objective http://www.microbehunter.com/2008/12/15/about-the-numbers-on-the-objective/ of Microscopy, Microbes and More Sun, 29 Jan 2012 20:12:04 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: charlie g http://www.microbehunter.com/2008/12/15/about-the-numbers-on-the-objective/comment-page-1/#comment-1637 charlie g Sat, 26 Feb 2011 19:39:39 +0000 http://microscopy.okim.info/?p=225#comment-1637 Hi all, on a few occassions, a sellor on eBay offers images of an objective for sale...but with crucial engravings: 160 , or 'the infinity sign' , or '0.17' not shown in the images of the item. It gets frustrating when you contact the sellor, and they do not /can not tell you if the item for sale is a: '160' , or an 'infinity' objective. This happened with a black colored objective said to be: "Meles Gerote"/80x...but nothing about wether: '160' , or 'infinity' objective. Thanks for this useful summary of objective lens barrel engraved criteria, Oliver. charlie guevara Hi all, on a few occassions, a sellor on eBay offers images of an objective for sale…but with crucial engravings: 160 , or ‘the infinity sign’ , or ’0.17′ not shown in the images of the item.

It gets frustrating when you contact the sellor, and they do not /can not tell you if the item for sale is a: ’160′ , or an ‘infinity’ objective. This happened with a black colored objective said to be: “Meles Gerote”/80x…but nothing about wether: ’160′ , or ‘infinity’ objective.

Thanks for this useful summary of objective lens barrel engraved criteria, Oliver. charlie guevara

]]> By: Oliver http://www.microbehunter.com/2008/12/15/about-the-numbers-on-the-objective/comment-page-1/#comment-1530 Oliver Tue, 21 Dec 2010 05:51:15 +0000 http://microscopy.okim.info/?p=225#comment-1530 Hi Lou, The infinity objectives can only be used on infinity microscopes. They are a different than the "finite" objectives. As a matter of fact, infinity objectives of different manufacturers are not even interchangeable with each other. It's not only a question of optical design, also the threading is different. The infinity objectives require additional optics in the body of the microscope. The advantage of the infinity objectives is that it is possible to introduce additional filters into the light beam without changing the focus of the microscope. Oliver. Hi Lou,
The infinity objectives can only be used on infinity microscopes. They are a different than the “finite” objectives. As a matter of fact, infinity objectives of different manufacturers are not even interchangeable with each other. It’s not only a question of optical design, also the threading is different. The infinity objectives require additional optics in the body of the microscope. The advantage of the infinity objectives is that it is possible to introduce additional filters into the light beam without changing the focus of the microscope.
Oliver.

]]> By: Lou http://www.microbehunter.com/2008/12/15/about-the-numbers-on-the-objective/comment-page-1/#comment-1529 Lou Mon, 20 Dec 2010 22:21:11 +0000 http://microscopy.okim.info/?p=225#comment-1529 "About the numbers on objectives" I thought that this was very useful, but I have seen some lenses with the "infinity" sign. Am I to assume that this type of lens could be used on any tube length ? Thanks, Lou “About the numbers on objectives” I thought that this was very useful, but I have seen some lenses with the “infinity” sign. Am I to assume that this type of lens could be used on any tube length ?

Thanks, Lou

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