Mitutoyo 20x SL NA 0.28x vs. mitutoyo 20x LWD NA 0.42

daemonoropsis · Post by **daemonoropsis** » Thu Mar 28, 2013 4:49 am

Im considering one of these as I'm sellig some old equipment that will make them economically available to me.

Does anyone have working experience with either two or both? pros and cons?

If I buy one I will probably be using it on a stackshot on a 200mm tube lens. will the stackshots high precision mode give med small enough steps to use them?

Pau · Post by **Pau** » Thu Mar 28, 2013 8:31 am

Because resolution is mainly determined by the NA, I only would look for the 0.42.

pierre · Post by **pierre** » Thu Mar 28, 2013 12:07 pm

Same there

Charles Krebs · Post by **Charles Krebs** » Thu Mar 28, 2013 12:41 pm

This makes three strikes against the 0.28 version.

Unless there is some compelling reason (absolutely necessary!) reason why you need a little more working distance, definitely the 0.42 version.

(I'm sure the 0.28 is a quality piece, but you are giving up a good amount of resolution).

conkar · Post by **conkar** » Mon Apr 01, 2013 2:32 am

As others have said here the Mitutoyo 20x na 0.42 wd 20mm has better resolution than the Mitutoyo 20x SL na 0.28 wd 30.5mm.

So if I have to chose I would go with the Mitutoyo 20x na 0.42.

BTW, I enclose a test image taken with the Mitutoyo 20x SL na 0.28.

Some data of the Mitutoyo Infinity-Corrected Long Working Distance Objectives can be found here:
http://www.edmundoptics.com/imaging/ima ... tives/1942

Regards,
Conny

Mothwing with 20X Mitutoyo Plan Apo SL Infinity-Corrected Objective and canon ef 200mm f/2.8l ii usm as "tube lens" - DSLR 5DmkII

High res:
http://farm6.staticflickr.com/5080/7098 ... 1276_o.jpg

seta666 · Post by **seta666** » Mon Apr 01, 2013 3:13 am

I had the mitutoyo SL 20/0.28 and quality was pretty bad, I sold it.