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Difference mitutoyo plan apo and mitutoyo bd plan apo

 
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hawoodrose



Joined: 08 Jan 2018
Posts: 1

PostPosted: Fri Feb 02, 2018 8:17 pm    Post subject: Difference mitutoyo plan apo and mitutoyo bd plan apo Reply with quote

Hi there,

I looking for a mitutoyo lens since long time, and i have a question. I want to know what is the difference between the mitutoyo 20x plan apo 0.42 and the mitutoyo BD plan apo 0,42 ?

I know the BD is the brightfield-darkfield version , with the ring opening around the front element which allows the annular illumination for DF microscopy.

But i want to know if optically this is the same, i see that's a little bit more cheap than the 'normal' version on eBay...

Thanks a lot in advance for your answer and for you time !

See you
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Lou Jost



Joined: 04 Sep 2015
Posts: 2164
Location: Ecuador

PostPosted: Fri Feb 02, 2018 8:47 pm    Post subject: Reply with quote

The specifications (including the resolution) are the same for both. See:
http://www.mitutoyo.com/wp-content/uploads/2012/11/E4191-378_010611.pdf
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rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 18790
Location: Richland, Washington State, USA

PostPosted: Sat Feb 03, 2018 10:43 am    Post subject: Reply with quote

hawoodrose, welcome aboard!

Yes, the BD should be optically equivalent to the normal version.

Internal details of the lenses may be different. Mitutoyo changes the details of their optical formulation from time to time even for "exactly" the same lens, that is, the same magnification and model number. But from a performance standpoint, BD optics should act the same as non-BD.

--Rik
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RobertOToole



Joined: 17 Jan 2013
Posts: 635
Location: United States

PostPosted: Sun Feb 11, 2018 6:09 pm    Post subject: Re: Difference mitutoyo plan apo and mitutoyo bd plan apo Reply with quote

hawoodrose wrote:
Hi there,

I looking for a mitutoyo lens since long time, and i have a question. I want to know what is the difference between the mitutoyo 20x plan apo 0.42 and the mitutoyo BD plan apo 0,42 ?

I know the BD is the brightfield-darkfield version , with the ring opening around the front element which allows the annular illumination for DF microscopy.

But i want to know if optically this is the same, i see that's a little bit more cheap than the 'normal' version on eBay...

Thanks a lot in advance for your answer and for you time !

See you


Hi hawoodrose

I own both DB Plan and M Plan Mitutoyos, I find the results are identical so I would say optically they are the same, both are excellent.

Agree with Rik that there are probably updates to the lenses over time.

Hope this helps.

Robert
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concon



Joined: 01 Jun 2017
Posts: 87

PostPosted: Mon Feb 12, 2018 8:54 am    Post subject: Reply with quote

Glad to see you're reconsidering the Mitutoyos - you'll be much better off grabbing a BD or M, whichever is cheaper, over a Motic.
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