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Hi there,

unfortunately, even the same vendor changes the compensation scheme from 
time to time. I remember that for our new confocal the old objectives from 
SP2 were not ideal, as the tube lens had changed... (maybe they just wanted 
to sell more objectives, I'm sure the images would be fine; we didn't buy 
the new lenses nor the new fonfocal yet :-).
See e.g. this document (page 10): http://www.mikrol.ru/fileadmin/downloads/
Other/Publications/Leica_STI_CDR1_Schade_et_al_eng.PDF

I believe that the new Olympus objectives are fully corrected. We often use 
them with a simple achromatic doublet tubelens and the image is fine 
(although we are not doing confocal imaging, which is more sensitive).

Cheers,

zdenek


---------- Původní zpráva ----------
Od: Pedro Almada <[log in to unmask]>
Datum: 27. 5. 2013
Předmět: Re: Objective Corrections by Maker

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Dear Listers and Guy,

Yes, you are right. Their original answer was just that the tubelens was
achromat so I was hoping someone knew more specifically. On your
suggestion, I pressed more and he said this:
"Our Product Manager has confirmed that the correction are made on both:
objective and tube lens."

So I guess their lenses aren't exchangeable with Nikon! Sad to hear.

Thank you,
Pedro Almada


On 24 May 2013 10:45, Guy Cox <[log in to unmask]> wrote:

> Demand a definitive answer from Leica. You are spending big money here
> and obviously back at Wetzlar there is someone who can answer your
> question. From what I have heard, only Nikon state definitively that all
> corrections are done in the objective, but I would be very interested to
> hear any further information.
>
> Guy
>
> -----Original Message-----
> From: Confocal Microscopy List [mailto:[log in to unmask]]
> On Behalf Of Pedro Almada
> Sent: Friday, 24 May 2013 6:45 PM
> To: [log in to unmask]
> Subject: Objective Corrections by Maker
>
> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> *****
>
> Dear list members,
>
> This another non confocal question but I believe it fits the interests of
> the list. We're trying to find out if Leica does any of the corrections 
for
> it's objectives on the tube lens. We've heard that Olympus and Nikon do 
all
> corrections on the objective itself but Zeiss requires the correct tube
> lens. Is this accurate? I've asked our Leica rep but he couldn't answer.
>
> The reason we're asking is that we have a Nikon body but we're very
> interested in a specific Leica lens. They use the same thread and tube
> focal distance, only the parfocal distance is different and we can live
> with that...
>
> Any insight is appreciated!
>
> Best,
> Pedro Almada
>"