Mayfly and Midge

Will Milne · Post by **Will Milne** » Mon Aug 23, 2010 5:39 pm

Couple of stacks with a Nikon CF Plan 20 0.5 160/0.17 and Zerene.

Baetidae( mayfly) nymph gills.Partial Cross Polarized/Oblique brightfield.

Chironomidae ( non-biting midge)larvae. Partial Cross Polarized brightfield.

Will

Charles Krebs · Post by **Charles Krebs** » Tue Aug 24, 2010 4:49 pm

Hi Will,

I can see some effect in the second image, but was there any advantage to using the polarizers in the first one?

Will Milne · Post by **Will Milne** » Wed Aug 25, 2010 11:51 am

Hi Charles

In the first image the cross polar gave a bit more saturation to what little colour there was in the specimen . I am using a pair of circ photo polarizers facing each other . I noticed anything other than a few degrees of rotation seems to lead to contrast that exceeds the histogram . So I was using it sparingly.

Will