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Re: chromatic aberration

Posted by Martin Wessendorf-2 on Dec 28, 2011; 9:25pm
URL: http://confocal-microscopy-list.275.s1.nabble.com/Concentrating-bacteria-cells-for-microscope-visualization-tp6519025p7134058.html

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How are you measuring the aberration?  Beads?  Reflectance?

On 12/28/2011 2:46 PM, MODEL, MICHAEL wrote:

> Olympus. Their higher-NA objectives are fine
>
> -----Original Message-----
> From: Confocal Microscopy List [mailto:[hidden email]] On Behalf Of Martin Wessendorf
> Sent: Wednesday, December 28, 2011 3:25 PM
> To: [hidden email]
> Subject: Re: chromatic aberration
>
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> To join, leave or search the confocal microscopy listserv, go to:
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> Hey, Mike--
>
> On 12/28/2011 2:01 PM, MODEL, MICHAEL wrote:
>
>> Both of our 10/0.4 planapo objectives have a bad longitudinal chromatic aberration between blue and far red (2.5 um axial shift with correct coverslip). Is this normal for low-power objectives?
>
> What manufacturer?  Not to trash any particular brand but I've seen
> problems that bad on 60x oil objectives from some makers and would
> expect a 10x objective to be even worse.
>
> Martin

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