www.photomacrography.net :: View topic - Stereo diatoms (crossed eyed pairs)
www.photomacrography.net Forum Index
An online community dedicated to the practices of photomacrography, close-up and macro photography, and photomicrography.
Photomacrography Front Page Amateurmicrography Front Page
Old Forums/Galleries
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Stereo diatoms (crossed eyed pairs)
Goto page 1, 2  Next
 
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Photography Through the Microscope
View previous topic :: View next topic  
Author Message
Charles Krebs



Joined: 01 Aug 2006
Posts: 5803
Location: Issaquah, WA USA

PostPosted: Wed May 17, 2017 12:32 am    Post subject: Stereo diatoms (crossed eyed pairs) Reply with quote

My last marine sample was getting pretty "ripe" so I cleaned some of the diatoms before tossing it. Here are four cross-eyed stereo pairs. These were photographed "dry" with the Olympus 50/0.50 LMPLFLN objective. Converted to black and white since there was no color, the exception being the third one where the girdle behaved like a diffraction grating so I left it in color.








_________________
http://www.krebsmicro.com
Back to top
View user's profile Send private message Visit poster's website
Jacek



Joined: 02 Oct 2011
Posts: 4983
Location: Poland

PostPosted: Wed May 17, 2017 3:23 am    Post subject: Reply with quote

Mega Super !
_________________
https://photos.app.goo.gl/MV9IynUtBdaKkVj53
Back to top
View user's profile Send private message Send e-mail
Marek Mis



Joined: 10 Jul 2010
Posts: 2464
Location: Suwalki, Poland

PostPosted: Wed May 17, 2017 4:34 am    Post subject: Reply with quote

Beautiful and perfect quality images !
Diatoms look like glass and rich ornamented boxes Smile

Marek
Back to top
View user's profile Send private message Visit poster's website
zzffnn



Joined: 22 May 2014
Posts: 1670
Location: Texas USA

PostPosted: Wed May 17, 2017 5:01 am    Post subject: Reply with quote

Very beautiful!! Thank you for sharing!
_________________
Selling my Canon FD 200mm F/2.8 lens
Back to top
View user's profile Send private message Visit poster's website
carlos.uruguay



Joined: 23 Feb 2012
Posts: 4928
Location: Uruguay - Montevideo - America del Sur

PostPosted: Wed May 17, 2017 5:25 am    Post subject: Reply with quote

Super as usual
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Pau
Site Admin


Joined: 20 Jan 2010
Posts: 4345
Location: Valencia, Spain

PostPosted: Wed May 17, 2017 8:23 am    Post subject: Reply with quote

Wow! fabulous set.

just one point: the stereo of the BW images is perfect but I cant see the color one so well aligned, do other people have the same issue? (I can't see cross eye stereos so I convert them to parallel and use a mirror viewer)
_________________
Pau
Back to top
View user's profile Send private message
vendav



Joined: 31 Jul 2008
Posts: 75

PostPosted: Wed May 17, 2017 10:15 am    Post subject: Reply with quote

The colour images work for me as a cross eye pair, with perfect alignment.
I've not appreciated before that diatoms could look just like a mix of boiled sweets!
Kind regards,
David Razz
Back to top
View user's profile Send private message
Olympusman



Joined: 15 Jan 2012
Posts: 3671

PostPosted: Thu May 18, 2017 12:29 pm    Post subject: Diatoms Reply with quote

How shall I put this? ZOWIE!

Mike
_________________
Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA
Back to top
View user's profile Send private message
Troels



Joined: 15 Feb 2016
Posts: 331
Location: Denmark, Engesvang

PostPosted: Thu May 18, 2017 1:17 pm    Post subject: Reply with quote

Those stereo images are wonderful!
_________________
Troels Holm, biologist (retired), environmentalist, amateur photographer.
Visit my Flickr albums
Back to top
View user's profile Send private message Visit poster's website
rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 18911
Location: Richland, Washington State, USA

PostPosted: Thu May 18, 2017 4:06 pm    Post subject: Reply with quote

Wonderful!

Pau wrote:
the stereo of the BW images is perfect but I cant see the color one so well aligned, do other people have the same issue?

I see the same thing. I think it is because this subject is a single large cylinder, viewed with a large angle between left and right eyes. That combination means that there are large regions on the left and right sides of the cylinder that are seen by one eye but not the other. The result, for me, is that the sides of the cylinder seem to "shimmer", while the top, front, and back sides all lock up solid.

Looking at the pair not locked up, I am immediately struck that the cylinder on the left is tipped toward the left, while the cylinder on the right is almost vertical. The thought comes to mind that this must mean some error in assembling the pair, but I believe that thought is not correct. On closer study, I think that what we're looking at is just a cylinder that would be leaning a little to the left in a straight-on view, as well as being tipped toward us so we can see the top. Then the stereo rendering for one eye's view makes the top move farther left, adding to the apparent tip, while the other eye's view moves the top farther right and cancels the apparent tip.

In other words the stereo is correct, but we're still left with large areas on the left and right that don't get presented to both eyes.

--Rik
Back to top
View user's profile Send private message Visit poster's website
Pau
Site Admin


Joined: 20 Jan 2010
Posts: 4345
Location: Valencia, Spain

PostPosted: Fri May 19, 2017 7:49 am    Post subject: Reply with quote

Rik, thanks for your analysis, I would not be able to accurately describe the effect. I'm glad I'm not alone experiencing the issue.
_________________
Pau
Back to top
View user's profile Send private message
Sumguy01



Joined: 28 Jan 2013
Posts: 1085
Location: Ketchikan Alaska USA

PostPosted: Sun May 21, 2017 7:48 am    Post subject: Reply with quote

Applause Very nice set.
Thanks for sharing.
Back to top
View user's profile Send private message
WalterD



Joined: 06 Jul 2015
Posts: 357
Location: Rotterdam, the Netherlands

PostPosted: Tue May 23, 2017 8:21 am    Post subject: Reply with quote

Beautiful! I still have to figure out how to watch them though, you use something like a stereoscope?

Cheers


Walter
Back to top
View user's profile Send private message Visit poster's website
pwnell



Joined: 18 Dec 2009
Posts: 1982
Location: Tsawwassen, Canada

PostPosted: Tue Jun 13, 2017 9:51 am    Post subject: Reply with quote

Incredible. Looks almost like an electron microscope image with that extended depth of field and lack of halos.
Back to top
View user's profile Send private message
Smokedaddy



Joined: 07 Oct 2006
Posts: 1100
Location: Phoenix, Arizona

PostPosted: Tue Jun 13, 2017 12:32 pm    Post subject: Reply with quote

Wow, very nice Charles.
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Photography Through the Microscope All times are GMT - 7 Hours
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group