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Orchid Ghost Head

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#1 Bernard Foot

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Posted 16 July 2020 - 15:49

I love the compex structure of orchids, and enjoy trying to photograph them.

One of the things that fascinates me is the "head" (the gynostemium and anther cap may be what the botanist would call it - but I'm sure I'll be corrected). I've noticed that this appears to be glowing in UV shots, so I thought I'd try and macro-photograph it. Here's my attempt. Unfortunately none of my UV-frendly lenses (Focotar-2, Cassar S, El NIk 80, El Nik 105) give crisp images in UV at macro ranges, so the quality isn't great. The macro magnification was about 4:1. There is a visible image for comparison, and 3D anaglyphs.

UV image: Camera - Sony A6000; Lens - El Nik 80 (provided by Ulf - many thanks) @ f/8; ISO - 100; Filter - Baader U; Lighting - 4 cheap-from-China flashguns (GN 50), modified for UV.

Visible image: Camera - Canon EOS 6D II; Lens - El Nik 2.8/50mm N @ F/8; ISO - 100; Lighing - Yongnuo Ring Flash.

The UV image makes me think of a ghost head, especally with its hoodie. On the other hand, the visible image makes me think of an angry fish.

Attached Image: Orchid Ghost Head UV 2  R.jpg

Attached Image: Stereo Orchid Ghost Head UV 2.jpg

Attached Image: Orchid Ghost Head R.jpg

Attached Image: Stereo Orchid Ghost Head.jpg
Bernard Foot

#2 Andrea B.

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Posted 16 July 2020 - 16:04

I *does* look like a ghost head! Or maybe Darth Vader? :grin:
And the other one like a manta ray, perhaps.

Good work, as always, Bernard.

Added: Now the 2nd version appears to be an angry bird.
Andrea G. Blum
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#3 Andrea B.

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Posted 16 July 2020 - 16:10

Unfortunately none of my UV-frendly lenses (Focotar-2, Cassar S, El NIk 80, El Nik 105) give crisp images in UV at macro ranges

Do you increase the edge accutance of details in the converter by using some kind of sharpening tool?
Andrea G. Blum
Often found hanging out with flowers & bees.

#4 Bernard Foot

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Posted 16 July 2020 - 16:35

View PostAndrea B., on 16 July 2020 - 16:10, said:

Unfortunately none of my UV-frendly lenses (Focotar-2, Cassar S, El NIk 80, El Nik 105) give crisp images in UV at macro ranges

Do you increase the edge accutance of details in the converter by using some kind of sharpening tool?

I haven't used sharpening - I'll have to look into that, it may help.
Bernard Foot

#5 Andy Perrin

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Posted 16 July 2020 - 16:48

That's very pretty, Bernard, in both spectra.

#6 dabateman

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Posted 16 July 2020 - 20:46

These are excellent.
I really hope my flower bloms this year.

I have heard Topaz AI sharpen is supposed to be best. I own it as update from licences I bought all most 10 years ago. Still haven't tried it yet.
I only just recently got a computer even close to handling it.

Edited by dabateman, 16 July 2020 - 20:47.


#7 UlfW

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Posted 17 July 2020 - 09:35

Bernhard,
I would say they are rather good.

You might improve the sharpness slightly by reversing the lens.
These lenses are not completely symmetrical and designed for magnifications <1
Sharpening will improve the images even more.
Ulf Wilhelmson
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#8 Bernard Foot

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Posted 17 July 2020 - 15:02

View PostUlfW, on 17 July 2020 - 09:35, said:

Bernhard,
I would say they are rather good.

You might improve the sharpness slightly by reversing the lens.
These lenses are not completely symmetrical and designed for magnifications <1
Sharpening will improve the images even more.

Hi, Ulf.

I do reverse the lens when magnification gets to 1:1. I'm starting to try out sharpening - it certainly makes a difference.
Bernard Foot