Objective ID please.

Everything relating to microscopy hardware: Objectives, eyepieces, lamps and more.
Post Reply
Message
Author
Gasman
Posts: 153
Joined: Sat Jan 09, 2016 1:36 pm
Location: North East UK

Objective ID please.

#1 Post by Gasman » Tue Oct 27, 2020 8:17 pm

Hi guys
My trusty Leitz Laborlux S came with 5 Leitz Wetzlar objectives giving x4,x10,x25,x40 and the last one x100 which is labelled Wetlzar 160/0.17, NPL Fluotar 100/1.32 OEL. Would I be correct in thinking it's for use with oil as it doesn't show a great deal of detail without?.
Thanks
Steve

Scarodactyl
Posts: 2775
Joined: Sat Mar 03, 2018 9:09 pm

Re: Objective ID please.

#2 Post by Scarodactyl » Tue Oct 27, 2020 8:20 pm

Oel is german for oil.

EYE C U
Posts: 288
Joined: Wed Jul 15, 2020 5:18 pm

Re: Objective ID please.

#3 Post by EYE C U » Tue Oct 27, 2020 8:47 pm

I USE MINE WITHOUT OIL I HAVE A 160X

Gasman
Posts: 153
Joined: Sat Jan 09, 2016 1:36 pm
Location: North East UK

Re: Objective ID please.

#4 Post by Gasman » Tue Oct 27, 2020 10:10 pm

Thanks for info, I think maybe it might need a clean- just lens cloth and cleaner ok?. I've never used an oil objective before so will have to checkout the do's and dont's of that
Cheers
Steve

Gasman
Posts: 153
Joined: Sat Jan 09, 2016 1:36 pm
Location: North East UK

Re: Objective ID please.

#5 Post by Gasman » Tue Oct 27, 2020 10:49 pm

EYE C U wrote:
Tue Oct 27, 2020 8:47 pm
I USE MINE WITHOUT OIL I HAVE A 160X
I read that if you use an oil immersion objective either with the wrong oil or no oil at all you get spherical aberration??
Steve

apochronaut
Posts: 6272
Joined: Fri May 15, 2015 12:15 am

Re: Objective ID please.

#6 Post by apochronaut » Wed Oct 28, 2020 1:59 am

correct. use whatever the objective has been corrected for, otherwise the image quality will suffer. occasionally, an objective will perform reasonably well with several mediums, for instance both water and oil but that is rare. I have only encountered 1 or 2.
the 160X objective mentioned above sounds like it might be a metallurgical objective, many of which were intended for dry ( air spaced ) use.

Post Reply