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  #1  
Old 21st August 2018
Harold Gough Harold Gough is offline
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Tiny Harvestman Through Laowa 25mm x2.5 to x5

Due to a long, hot drought, I have had difficulty in finding subjects for this lens since it arrived in May. I was looking for fungi under a rotting plank of wood on the ground when I saw two tiny (body length ca 4mm?) Harvestmen. One allowed a couple of shots and then ran away. The other stayed still. Images of the first were disappointing.

The other individual gave usable images. They are not my best of Harvestmen nor do they make my best macro stereos of them. However, they show potential of the lens, which was set at 2.5:1 and f11 then f16.

Olympus EM-1 (manual mode), Laowa 25mm f2.8 2.5x-5x ultra macro, f11 or f16, triple TTL flash hand-held.

The stereos are crosseye.

Harold







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Old 21st August 2018
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Graham_of_Rainham Graham_of_Rainham is offline
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Re: Tiny Harvestman Through Laowa 25mm x2.5 to x5

Interesting set of images. I don't recall having seen these creatures before.
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Old 21st August 2018
Harold Gough Harold Gough is offline
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Re: Tiny Harvestman Through Laowa 25mm x2.5 to x5

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Originally Posted by Graham_of_Rainham View Post
Interesting set of images. I don't recall having seen these creatures before.
Graham,

Thanks. You will have seen them but they are a bit wispy and unsubstantial to the naked eye, like very slender House Spiders, so they may go unnoticed.

Harold
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Old 21st August 2018
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Re: Tiny Harvestman Through Laowa 25mm x2.5 to x5

Agreed. Interesting and well done. I wouldn’t have known they were spiders...
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Old 21st August 2018
Harold Gough Harold Gough is offline
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Re: Tiny Harvestman Through Laowa 25mm x2.5 to x5

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Agreed. Interesting and well done. I wouldn’t have known they were spiders...
They are not. I have inadvertently misled you.

Along with spiders, scorpions, ticks, and mites, all eight-legged, they are arachnids.

Spiders have a cephalothorax and an abdomen: harvestmen have an all in one unjointed body. This group all have chelicerae (sometimes modified as fangs) instead of mandibles in the insects (highly modified in the flies).

Harold
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Old 22nd August 2018
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Re: Tiny Harvestman Through Laowa 25mm x2.5 to x5

Interesting looking beasties Nicely captured.

How do the stereo images work Harold?
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Old 22nd August 2018
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Re: Tiny Harvestman Through Laowa 25mm x2.5 to x5

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Interesting looking beasties Nicely captured.

How do the stereo images work Harold?
I assume you mean how to make my pairs work.

Some people get it at their first attempt and others, like myself, may take many weeks to get image mergence.

Essentially, you have to view the left one with your right eye and the right one with your left eye, preferably focusing at middle distance, rather than screen distance.

The most popular way is to hold your index finger vertically against you nose. You then looks towards it by crossing your eyes. You do this as the finger moves away from your face towards the dividing line between L & R images, eventually transferring your gaze to the images. Keeping relaxed helps a lot.

What you are after is a third (virtual) image between the two real ones.

Harold
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Old 22nd August 2018
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Re: Tiny Harvestman Through Laowa 25mm x2.5 to x5

Thanks for the explanation I will give it a try, sounds a bit like those hidden 3D posters that used to be popular, I could see those ok.
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