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There are couple used Zeiss Ultrafluar on eBay 80x/0.95 and 120x/0.95


-----Original Message-----
From: Confocal Microscopy List [mailto:[log in to unmask]] On Behalf Of Paul Lebel
Sent: Wednesday, October 04, 2017 12:02 PM
To: [log in to unmask]
Subject: Zeiss Ultrafluor objectives

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Dear confocal community,
Does anyone know of where I could buy discontinued or used (in very good
condition) Zeiss Ultrafluor objectives, 40x or higher? It seems their higher magnifications are discontinued. Alternatively, if anybody knows other objectives with high transmission ratio down to 260 nm it would be greatly appreciated. Other deep UV threads on this list mostly discuss light sources and multiphoton excitation approaches - I did not see much discussion on sourcing UV imaging optics but apologies if I missed an existing, relevant thread.

High NA reflective objectives are also an option, but it would seem that accessible off the shelf models are aberration-limited (for example thorlabs LMM-40X-UVV-160 includes a zemax model showing a ray spot diagram limited to 1.2 um resolution). I have not seen models of other similar objectives, but they are for the most part also two-mirror Schwarzschild layout and so also limited to two correcting surfaces. It occurs to me that the lithography community would be a great source of high resolution reflecting optics, but I am much less familiar with that field.

Any help would be greatly appreciated.
Thanks!

Paul


--
Paul Lebel, PhD
Senior R&D Engineer
Chan Zuckerberg Biohub
499 Illinois Street, San Francisco