www.photomacrography.net :: View topic - Feedback and advice on Coral Image
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 
Feedback and advice on Coral Image

 
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Beginners Macro
View previous topic :: View next topic  
Author Message
capoty



Joined: 16 Jun 2017
Posts: 4
Location: Australia

PostPosted: Sun Nov 12, 2017 5:56 pm    Post subject: Feedback and advice on Coral Image Reply with quote



My first time posting so would appreciate any assistance.
I have undertaken a project to photograph live coral in a saltwater tank. Macro will vary from 1:1 to hopefully 5:1 if we can get it to work. It is surprising how much movement we get in these hard corals and they certainly react to the light ( Flash ) This is one of our first attempts with no processing apart from a quick levels. 160 stacked images ( Zerene) Canon 6D Mk11 with 100 macro.

Would love to know any thoughts on what we should be looking for regarding stacking issues /noise /sharpness etc. And suggestions on how to handle aligning of images that have subject movement would be appreciated.

I have a heap more questions but look forward to a start . Thanks..
Back to top
View user's profile Send private message
Lou Jost



Joined: 04 Sep 2015
Posts: 1799
Location: Ecuador

PostPosted: Sun Nov 12, 2017 6:16 pm    Post subject: Reply with quote

That's beautiful!
_________________
Lou Jost
www.ecomingafoundation.wordpress.com
www.loujost.com
Back to top
View user's profile Send private message Visit poster's website
capoty



Joined: 16 Jun 2017
Posts: 4
Location: Australia

PostPosted: Sun Nov 12, 2017 6:21 pm    Post subject: Reply with quote

Thanks Lou.. It is called an Australian War Coral
Back to top
View user's profile Send private message
Saul



Joined: 31 Jan 2011
Posts: 914
Location: Naperville, IL USA

PostPosted: Sun Nov 12, 2017 6:47 pm    Post subject: Reply with quote

Incredible macro
_________________
Saul
Studio, horizontal and field setups
Back to top
View user's profile Send private message Visit poster's website
mawyatt



Joined: 22 Aug 2013
Posts: 985

PostPosted: Sun Nov 12, 2017 7:54 pm    Post subject: Reply with quote

Stunning image, wonderful colors and detail!!

How do you deal with the glass on the aquarium?

Cheers,

Mike
Back to top
View user's profile Send private message
rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 18252
Location: Richland, Washington State, USA

PostPosted: Sun Nov 12, 2017 10:50 pm    Post subject: Re: Feedback and advice on Coral Image Reply with quote

capoty, welcome aboard!

Nice image -- I see that the bar for first-time posts has been raised once again. Smile

Quote:
It is surprising how much movement we get in these hard corals and they certainly react to the light ( Flash )

Do you need to use flash for your stacked images? Subject movement will usually degrade a stack even if flash has made the individual images sharp. You might be better off to use continuous illumination and just accept some blurring in case of subject movement.

If you're using flash as a way of freezing out vibration caused by camera shutter, then be sure to read up on how to use the camera's capability to use electronic first shutter curtain (EFSC). With EFSC, you should have no trouble getting sharp images with continuous illumination, assuming that the subject is not moving.

Quote:
Would love to know any thoughts on what we should be looking for regarding stacking issues /noise /sharpness etc.

The stack looks clean to me except for these "closed contour lines" in out-of-focus background:



Best guess is that those are due to pushing the DMap contrast threshold slider too far left, so that the software makes mistakes by trying to infer depth from image content, even in areas where there's not enough sharp detail to do that correctly. The slider should be pushed right until those problematic areas go "black in preview". This is discussed in more detail in the tutorial "How To Use DMap", linked from the main Tutorials index page at https://zerenesystems.com/cms/stacker/docs/tutorials/tutorialsindex .

Quote:
suggestions on how to handle aligning of images that have subject movement would be appreciated.

That's a hard problem and I don't know any good way to do it.

Every focus stacking package that I know assumes that images can be aligned by linear operations on the entire image: shift/scale/rotate. If part of the subject moves with respect to another part, then no attempt is made to introduce nonlinear "warping" transformations to keep the moving parts lined up from frame to frame. (Photoshop will automatically do a bit of nonlinear warping, but it's really restricted to modeling lens distortions, which is commonly needed in side-by-side stitching applications.)

In some cases you might be able to use Stack Selected in combination with retouching to clean up problems caused by subject motion.

I hope this helps!

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



Joined: 16 Jun 2017
Posts: 4
Location: Australia

PostPosted: Sun Nov 12, 2017 11:28 pm    Post subject: Reply with quote

Thanks for the feedback everyone

Mike .. We really assumed that the glass was going to be an issue. Suprisingly we have had no problems. The water actually seems to act as a diffuser.
I am considering replacing the front glass on our tank with a thinner better quality glass though.

Appreciate the comments Rik. Initially we started with continuous lights but yes we got movement issues.. I was just reading up on the weekend about using EFSC as its not something I have needed in my normal photography. Sounds like I should go further down that path.

Cheers.. John
Back to top
View user's profile Send private message
Harald



Joined: 13 May 2011
Posts: 395
Location: Steinberg, Norway

PostPosted: Mon Nov 13, 2017 10:26 am    Post subject: Reply with quote

Hi there John,
This is great macro indeed..

Quote:
I have undertaken a project to photograph live coral in a saltwater tank. Macro will vary from 1:1 to hopefully 5:1 if we can get it to work.


Is this 1:1?
First I thought it was fluorescent microscopy..
Thanks a lot for sharing this inspirational image Very Happy
_________________
Kind Regards
Harald

Lier Fotoklubb / NSFF
AFIAP / CPS
BGF / GMV
http://www.500px.com/blender11
Back to top
View user's profile Send private message Visit poster's website
Troels



Joined: 15 Feb 2016
Posts: 272
Location: Denmark, Engesvang

PostPosted: Mon Nov 13, 2017 1:29 pm    Post subject: Reply with quote

Very beautiful.
It also makes me curious about magnification/field of view?
_________________
Troels Holm, biologist (retired), environmentalist, amateur photographer.
Visit my Flickr stream
Back to top
View user's profile Send private message
capoty



Joined: 16 Jun 2017
Posts: 4
Location: Australia

PostPosted: Mon Nov 13, 2017 4:49 pm    Post subject: Reply with quote

Thanks again all for your nice comments. I am very surprised . This was our second attempt at a coral. the first was thwarted by water temp and coral reaction to that issue. The coral very quickly clouded the water

Its a bit closer than 1:1 100 mm macro plus diopter. We did attempt some images with a reversed 50mm Nikon lens on a 200 mm lens but by the time we got to that stage the coral was closing up. And with the movement the stacking looked horrible.

Our inspiration comes from an Australian site who as a complete newbie to macro I think are just fantastic.

http://www.microworldsphotography.com/Galleries/Macro-of-corals/

I look forward to learning a lot more from the project and this site.

Thanks.. John
Back to top
View user's profile Send private message
Pau
Site Admin


Joined: 20 Jan 2010
Posts: 4008
Location: Valencia, Spain

PostPosted: Tue Nov 14, 2017 1:35 am    Post subject: Reply with quote

capoty wrote:
Our inspiration comes from an Australian site who as a complete newbie to macro I think are just fantastic.

http://www.microworldsphotography.com/Galleries/Macro-of-corals/


Daniel Stoupin is a forum member with the nickname Starshade
_________________
Pau
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Beginners Macro All times are GMT - 7 Hours
Page 1 of 1

 
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