Open Photography Forums  
HOME FORUMS NEWS FAQ SEARCH

Go Back   Open Photography Forums > UV/IR Thermal or Xray Photography

UV/IR Thermal or Xray Photography Humans happen to use visible light naturally but now we can go beyond the usual wavelengths we appreciate, to find out more about our world and ourselves.

Reply
 
Thread Tools Display Modes
  #1  
Old July 18th, 2018, 01:04 AM
Dr Klaus Schmitt Dr Klaus Schmitt is offline
Senior Member
 
Join Date: Jul 2010
Location: Weinheim, Germany
Posts: 1,163
Default Gazania colorful UV


an experiment with a selfmade quartz lens...
__________________
Klaus
https://www.flickr.com/photos/kds315/ my normal photographic work
http://photographyoftheinvisibleworld.blogspot.com/ my ultraviolet (UV) work
Reply With Quote
  #2  
Old July 18th, 2018, 09:56 AM
Asher Kelman Asher Kelman is offline
OPF Owner/Editor-in-Chief
 
Join Date: Apr 2006
Posts: 34,601
Default

Quote:
Originally Posted by Dr Klaus Schmitt View Post

an experiment with a selfmade quartz lens...
Interesting “Petzval” skin textured “Bokeh”!

I like this adventure.

How was it before sharpening?

Now how about taking pictures in a garden across the road in visible light!

Asher
__________________
Follow us on Twitter at @opfweb

Our purpose is getting to an impressive photograph. So we encourage browsing and then feedback. Consider a link to your galleries annotated, C&C welcomed. Images posted within OPF are assumed to be for Comment & Critique, unless otherwise designated.
Reply With Quote
  #3  
Old July 18th, 2018, 09:29 PM
Roshni Patel Roshni Patel is offline
Member
 
Join Date: Jun 2017
Posts: 162
Default

Lovely texture done
__________________
Auto Stamper
Reply With Quote
  #4  
Old July 18th, 2018, 11:39 PM
Dr Klaus Schmitt Dr Klaus Schmitt is offline
Senior Member
 
Join Date: Jul 2010
Location: Weinheim, Germany
Posts: 1,163
Default

Funny that you would call it "Petzval" as it is basically a "monocle lens" at work here!
__________________
Klaus
https://www.flickr.com/photos/kds315/ my normal photographic work
http://photographyoftheinvisibleworld.blogspot.com/ my ultraviolet (UV) work
Reply With Quote
  #5  
Old July 19th, 2018, 12:21 AM
Asher Kelman Asher Kelman is offline
OPF Owner/Editor-in-Chief
 
Join Date: Apr 2006
Posts: 34,601
Default

Quote:
Originally Posted by Dr Klaus Schmitt View Post
Funny that you would call it "Petzval" as it is basically a "monocle lens" at work here!
It’s the bg swirl!

Was it sharpened?

I am wondering how it would look untouched by edge enhancement!

Asher
__________________
Follow us on Twitter at @opfweb

Our purpose is getting to an impressive photograph. So we encourage browsing and then feedback. Consider a link to your galleries annotated, C&C welcomed. Images posted within OPF are assumed to be for Comment & Critique, unless otherwise designated.
Reply With Quote
  #6  
Old August 9th, 2018, 03:23 PM
Dr Klaus Schmitt Dr Klaus Schmitt is offline
Senior Member
 
Join Date: Jul 2010
Location: Weinheim, Germany
Posts: 1,163
Default

Quote:
Originally Posted by Asher Kelman View Post
It’s the bg swirl!

Was it sharpened?

I am wondering how it would look untouched by edge enhancement!

Asher
No special sharpening applied, only to compensate for resizing a little bit.
That Quartz lens stepped down is quite sharp in ints center!

Here is the whole series with various aperture settings:
http://photographyoftheinvisibleworl...ns-for_19.html

That rapid sharpness falloff outside the center area and towards VG, BG gives that 3D impression

Here same flower, same lens, at different angle:
http://photographyoftheinvisibleworl...-lens-for.html
__________________
Klaus
https://www.flickr.com/photos/kds315/ my normal photographic work
http://photographyoftheinvisibleworld.blogspot.com/ my ultraviolet (UV) work
Reply With Quote
  #7  
Old August 9th, 2018, 04:03 PM
Asher Kelman Asher Kelman is offline
OPF Owner/Editor-in-Chief
 
Join Date: Apr 2006
Posts: 34,601
Default

It looks like you chose the second of the examples you referenced. I like that balance as one doesn’t want the bg too harsh or too soft!

BRW, “contra lucem” is a term more associated with ecclestiastical debate in Latin. So you mean “back lit” it do you mean “reflected light” or what.

Is this more of a poetic term, or commonly used in academic Spectral investigations with biological samples?

Asher
__________________
Follow us on Twitter at @opfweb

Our purpose is getting to an impressive photograph. So we encourage browsing and then feedback. Consider a link to your galleries annotated, C&C welcomed. Images posted within OPF are assumed to be for Comment & Critique, unless otherwise designated.
Reply With Quote
  #8  
Old August 10th, 2018, 01:14 AM
Dr Klaus Schmitt Dr Klaus Schmitt is offline
Senior Member
 
Join Date: Jul 2010
Location: Weinheim, Germany
Posts: 1,163
Default

Quote:
Originally Posted by Asher Kelman View Post
It looks like you chose the second of the examples you referenced. I like that balance as one doesn’t want the bg too harsh or too soft!

BRW, “contra lucem” is a term more associated with ecclestiastical debate in Latin. So you mean “back lit” it do you mean “reflected light” or what.

Is this more of a poetic term, or commonly used in academic Spectral investigations with biological samples?

Asher
Yes, that's the one I selected, exactly because of that - it is balanced for me.

For me, it is "shooting against the light", was discussing this with an Italian
photographer friend many decades ago and he actually tought me this term.
I was using "contra lux", but he had corrected me it should be "contra lucem"

__________________
Klaus
https://www.flickr.com/photos/kds315/ my normal photographic work
http://photographyoftheinvisibleworld.blogspot.com/ my ultraviolet (UV) work
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Colorful Mess Peter Dexter Photojournalism - Street - Documentary 1 February 7th, 2017 10:25 PM
Colorful Sunrise Today Adrian Wareham Entry Digital Photography 8 August 20th, 2012 07:29 PM
Colorful Birds Zenon Char Wildlife 5 December 3rd, 2011 11:45 AM
My World: A colorful journey.. fahim mohammed Landscape - Travel 4 August 5th, 2011 03:51 PM
Vibrant, colorful Istanbul fahim mohammed Landscape - Travel 3 July 14th, 2008 06:03 PM


All times are GMT -7. The time now is 07:58 AM.


Posting images or text grants license to OPF, yet © of such remain with its creator. Still, all assembled discussion © 2006-2017 Asher Kelman (all rights reserved) Posts with new theme or unusual image might be moved/copied to a new thread!