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Walking iris

 
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leonardturner



Joined: 14 Mar 2013
Posts: 314
Location: Atlanta, GA, USA

PostPosted: Sun Feb 21, 2016 6:29 am    Post subject: Walking iris Reply with quote

The "walking iris" produces small flowers--the central petals span about 35 mm on my specimen, while the spiky white portion is about 5 mm. Blooms last for only a day. Trichomes are prominent and somewhat visible without magnification.











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ChrisR
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Joined: 14 Mar 2009
Posts: 7254
Location: Near London, UK

PostPosted: Sun Feb 21, 2016 6:38 am    Post subject: Reply with quote

Darn! When I saw "walking iris" I thought of stepping motors on lens diaphragms, something which has been on my mind Smile.

But these are much more attractive images, of a fascinating flower, very nice.
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Last edited by ChrisR on Mon Feb 22, 2016 7:08 am; edited 1 time in total
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Lou Jost



Joined: 04 Sep 2015
Posts: 1798
Location: Ecuador

PostPosted: Sun Feb 21, 2016 7:17 am    Post subject: Reply with quote

Very nice. Can you give more info on lighting, especially for the last one? How did you get the hairs to have such broad dark outlines in spite of the bright background? This is something I struggle with.
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Lou Jost
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leonardturner



Joined: 14 Mar 2013
Posts: 314
Location: Atlanta, GA, USA

PostPosted: Mon Feb 22, 2016 5:57 am    Post subject: Reply with quote

Chris, sorry, I had no intent to deceive! But stepping motors on apertures? I'm glad to even be out of the age of presetting f-stops and then having to remember to physically rotate to the preset before shooting!

Lou, lighting for the final image was LED modified by a cylinder of light absorbing paper of a size to slip over the Ikea light on one end and containing coffee filter diffusion materiel on the other, topped off with polarizing film. Optics for the last image consisted of a 10 X Nikon objective mounted on an old Nikon 200 mm lens with a polarizing filter between allowing variable degrees of extinction.

My thanks to you both for your comments.
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peterkinchington



Joined: 25 Apr 2011
Posts: 147
Location: Melbourne, Australia

PostPosted: Tue Mar 08, 2016 4:04 pm    Post subject: Iris shots Reply with quote

Hi Leonard,
Lovely series. I still use preset f/stops on some of my cameras!
Cheers Kanga
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Lou Jost



Joined: 04 Sep 2015
Posts: 1798
Location: Ecuador

PostPosted: Tue Mar 08, 2016 4:37 pm    Post subject: Reply with quote

Thank you very much for that information, Leonard. Lovely light in the whole series.
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leonardturner



Joined: 14 Mar 2013
Posts: 314
Location: Atlanta, GA, USA

PostPosted: Wed Mar 09, 2016 5:05 am    Post subject: Reply with quote

Thank you, Peter and Lou; appreciate your comments.
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