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PostPosted: Thu Dec 07, 2017 9:33 pm 
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Joined: Wed Nov 12, 2014 4:39 pm
Posts: 1746
Location: Illinois USA
Last night I found some beautiful needle shaped (with flared ends) diatoms in a new pond sample, decided to do a comparison of the LOMO 40x Plan Apo objective with K10x/18 eyepieces on the LOMO L-2-2 stand against the Olympus BH2 with 40x DPLAN objective.
The Olympus setup gave a nice view but with a fair bit of false color around the shell and in the oil droplets inside the diatom.
The LOMO setup gave a nice view with practically no false color in the same areas. Same slide, same diatom. I was very pleased with this result. This was bright field illumination, I did not attempt oblique or anything else.
It might not be as good as it could be if I had all the properly matched parts, but I'm going to call it good, at least for now. If I can get any decent afocal photos I'll put them up.
CE

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Olympus BH-2 / BHTU with Olympus E-P1 MFT camera mounted
LOMO BIOLAM L-2-2 (Boris)
LOMO POLAM L-213 / BIOLAM L-211 hybrid
LOMO Multiscope


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PostPosted: Fri Dec 08, 2017 12:05 am 
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Would like to see them...

BillT


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PostPosted: Fri Dec 08, 2017 1:14 am 
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Joined: Fri May 15, 2015 12:15 am
Posts: 1964
That sounds really positive. Nice to get those chroma out of the way. I'm sure you noticed better overall definition as well. The nice thing is; you can get many of the benefits of an apochromat but at a lower N.A., so your sample and coverslip precision need not be any different than when using a .65 achromat. It was a focused and unique choice for Lomo to make an N.A. .65 apo. I don't think I have seen another one like it. Most are high N.A. with short w.d.'s and mostly, coverslip correction obligatory.


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