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PostPosted: Wed Apr 10, 2019 7:32 am 
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Joined: Mon Dec 03, 2018 7:05 pm
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Location: Huizen, Netherlands


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PostPosted: Wed Apr 10, 2019 10:29 am 
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Location: Estepona
Nice catch. You should try oblique, think you will find they are more visible that way.

Almost missed this - would have expected it to be in Pictures and Videos

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Zeiss Standard WL & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)


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PostPosted: Wed Apr 10, 2019 2:15 pm 
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How do you achieve oblique illumination ? I know about Fl├Ęche de Mathias and filters, but none of them (which I tried DIY) worked properly at the moment.

Very cool amoeba, I'd love to catch one, their pseudopods are alien-like. Fascinating.


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PostPosted: Wed Apr 10, 2019 2:45 pm 
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Location: Estepona
There are several ways (and types) of Oblique illumination - all require trial and error and a little patience.

A quick and serviceable Oblique can be had by partially offsetting the brightfield port on a circular condenser while playing with the condenser diaphragm setting.

These two links provide a more nuanced Oblique:

van Egmond masks: viewtopic.php?f=15&t=4499

Gradient Universal Filter: http://www.photomacrography.net/forum/v ... hp?t=15142

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Zeiss Standard WL & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)


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PostPosted: Wed Apr 10, 2019 4:06 pm 
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Oh yeah, the van Egmond Mask, I tried it too ! it was a failure aha. To be honest, I don't really know where to put such masks. Most of them are between the condenser and the light path, but I have no idea how to hold them, filter slots ?
The Gradient Universal Filter is interesting, i'll try it asap. Thanks !


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PostPosted: Sat Apr 13, 2019 5:20 pm 
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Location: Huizen, Netherlands
Quote:
Nice catch. You should try oblique, think you will find they are more visible that way. Almost missed this - would have expected it to be in Pictures and Videos


I will try oblique next time. And post video's in Pictures and Video's.


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