www.photomacrography.net :: View topic - Pear rust
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 
Pear rust

 
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Administrator's Appreciation Gallery...Macro and Close-up Images
View previous topic :: View next topic  
Author Message
ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 7257
Location: Near London, UK

PostPosted: Wed Oct 10, 2012 1:25 am    Post subject: Pear rust Reply with quote

I was brought a leaf from a pear tree with a fungal gall, caused by Gymnosporangium, probably sabinae. It seems to be very common this year, I've seen better specimens since taking these pics.
It creates little "lanterns" on the pear leaf from which spores are dispersed, which in winter transfer to a juniper host species.
(I found a nice article about it which seems to have resubmerged into the google mire. If I find it again I'll post a link!)

Leaf underside, so this is "upside down". Field width about 12mm. From about 50 frames.


Crop from above, 1200px reduced to 1000


Field width about 3.8mm. From about 140, though half have little interest as there's not enough fibres in the back of the "lantern" - needs a better specimen.




Edit - not the link I sought but good.. Life Cycle on page 18:
http://ex-epsilon.slu.se:8080/archive/00002199/01/pear_rust_bachelor.pdf
Back to top
View user's profile Send private message
Chris S.
Site Admin


Joined: 05 Apr 2009
Posts: 2848
Location: Ohio, USA

PostPosted: Wed Oct 10, 2012 2:00 am    Post subject: Reply with quote

Chris, I like the first image quite a bit--though I'm partial to depictions of plant pathogens that show them very realistically and effectively in situ--something that seems more rare than it should be.

Nice conveyance of the size, shape, and 3-D structure of this organism. Your choice of soft light really seems to work for this.

So which of your lenses was in use, here? Canon MPE-65? 105 Printing Nikkor?

--Chris
Back to top
View user's profile Send private message Send e-mail
Planapo



Joined: 07 Nov 2006
Posts: 1533
Location: Germany, in the United States of Europe

PostPosted: Wed Oct 10, 2012 2:32 am    Post subject: Reply with quote

Excellent work, London Chris!

And I am with the American Chris: More details on lens and lighting, please! Smile

--Betty

Phew, I really have to be careful that I don't end up in a crisis of confusion with so many Chrises around here ! Very Happy Wink
_________________
Atticus Finch: "You never really understand a person until you consider things from his point of view
- until you climb into his skin and walk around in it."
Lee, N. H. 1960. To Kill a Mockingbird. J. B. Lippincott, New York.
Back to top
View user's profile Send private message
ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 7257
Location: Near London, UK

PostPosted: Wed Oct 10, 2012 4:37 am    Post subject: Reply with quote

First is MP-E on D600/t3i, auto flash on camera, angled sheet of tissue paper as flash target/diffuser, Pmax (some Dmap might have improved it).
Last is Nikon 5x(0.13 I think) inf objective, single flash, paper tissue diffuser, paper reflector.

I don't think any reasonable optics would have looked much different here.
Usual post processing - nothing special, though that might mean a dozen quick tweaks.

Quote:
I'm partial to depictions of plant pathogens that show them very realistically and effectively in situ
Sorry, I'm short by one tree Wink
Back to top
View user's profile Send private message
Charles Krebs



Joined: 01 Aug 2006
Posts: 5762
Location: Issaquah, WA USA

PostPosted: Wed Oct 10, 2012 11:10 am    Post subject: Reply with quote

Chris,

Very nice shots Chris.

You need to exercise that vast lens arsenal you have, and post more images. Wink
_________________
http://www.krebsmicro.com
Back to top
View user's profile Send private message Visit poster's website
ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 7257
Location: Near London, UK

PostPosted: Wed Oct 10, 2012 12:02 pm    Post subject: Reply with quote

Thanks Charles, but nothing I do is actually any good - my parents told me ... Wink
Back to top
View user's profile Send private message
rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 18248
Location: Richland, Washington State, USA

PostPosted: Fri Oct 12, 2012 10:30 pm    Post subject: Reply with quote

I presume your parents never saw these images.

They are definitely good. I would enjoy seeing more of them also.

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



Joined: 18 Dec 2010
Posts: 200
Location: Sweden

PostPosted: Sat Oct 13, 2012 8:48 am    Post subject: Reply with quote

Well done Chris!

I like the first one.........

Even if I can't see these stereos I think that picture also would be nice to be presented in stereo.

Regards,
Conny
Back to top
View user's profile Send private message Visit poster's website
abpho



Joined: 17 Aug 2011
Posts: 1423
Location: Earth

PostPosted: Sun Oct 14, 2012 12:41 pm    Post subject: Reply with quote

Interesting. I've seen many fallen leaves on my car that look like they have marshmallows attached to them. I often wanted to grab one to photograph but never did. By now it might be too late to get one.
_________________
I'm in Canada! Isn't that weird?
Back to top
View user's profile Send private message
ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 7257
Location: Near London, UK

PostPosted: Mon Oct 15, 2012 12:24 pm    Post subject: Reply with quote

This would probably look better with the backdround made less prominent, and attention to the front fibres where they're a bit transparent.


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


Joined: 01 Aug 2006
Posts: 18248
Location: Richland, Washington State, USA

PostPosted: Mon Oct 15, 2012 12:56 pm    Post subject: Reply with quote

The rotating one might be a good place to use Stack Selected, stopping just short of focusing that background leaf. But I emphasize "might". My track record is pretty bad for predicting whether I'll actually like what I see even though it seemed like a good thing to try.

In either case, both the rotation and the stereo work well for me. No doubts at all what the 3D structure is.

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


Joined: 14 Mar 2009
Posts: 7257
Location: Near London, UK

PostPosted: Mon Oct 15, 2012 1:45 pm    Post subject: Reply with quote

Stack Selected is what I had in mind, for the background of the stereo; followed by a visit to Photoshop for blurring/darkening/desaturating, before "putting it back". (Remembering to turn off "brightening" correction in Preferences).
The rocky one would probably need them all doing individually in a batch process.
This is one where an "extra stopped down" frame at stack-end might give an odd-looking result.

The background of the third image in the original post was at about effective f/80, so it had some dust showing on it!
Back to top
View user's profile Send private message
abpho



Joined: 17 Aug 2011
Posts: 1423
Location: Earth

PostPosted: Sat Nov 03, 2012 7:59 am    Post subject: Reply with quote

Good job. Congratulations for making it on the pic of the month.
_________________
I'm in Canada! Isn't that weird?
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 -> Administrator's Appreciation Gallery...Macro and Close-up Images 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