A quick and easy “dark field” adapter made from a solar cigarette lighter, readily available on eBay for just a few dollars (see for example here).
I removed the metal coil, and cut a plastic vial to reach the position at which the end of the cigarette would rest in the coil (the focus of the parabola). I stuck a small piece of black flocking material on the inside of the lighter, and glued a disc magnet on the convex base to provide a level support (a washer would work as well).
The image of the seed was taken with this setup using a combination of incident and dark field illumination.
Castilleja sp., Mitutoyo 7.5X M Plan Apo, NEX 7
Inexpensive dark field adapter
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Nice and effective!
How do you illuminate the mirror?, maybe with a ring of light from the rear of the subject (what's called a Lieberkühn reflector)?
http://www.alanwood.net/photography/oly ... ctors.html
How do you illuminate the mirror?, maybe with a ring of light from the rear of the subject (what's called a Lieberkühn reflector)?
http://www.alanwood.net/photography/oly ... ctors.html
Pau
Hi
Nice picture and thanks for the idea!
I like the black background. Did you get it this black when photographing, or was it necessary to darken it in post processing?
Best regards
Jörgen Hellberg
Nice picture and thanks for the idea!
I like the black background. Did you get it this black when photographing, or was it necessary to darken it in post processing?
Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo
Thanks Pau. I used a pair of Novoflex Macrolight Plus lights, with Vivitar 183 flashes. See herePau wrote:Nice and effective!
How do you illuminate the mirror?, maybe with a ring of light from the rear of the subject (what's called a Lieberkühn reflector)?
Thanks Jörgen. The black disc resting in the concavity is cut from an extremely light-absorbent material, Doodlebug Design Beetle Black Crushed Velvet Cardstock, see here and here , so apart from retouching around the immediate edge of the seed, there was no need to darken the background.JH wrote:Nice picture and thanks for the idea!
I like the black background. Did you get it this black when photographing, or was it necessary to darken it in post processing?
dmillard wrote:Thanks Jörgen. The black disc resting in the concavity is cut from an extremely light-absorbent material, Doodlebug Design Beetle Black Crushed Velvet Cardstock, see here and here , so apart from retouching around the immediate edge of the seed, there was no need to darken the background.JH wrote:Nice picture and thanks for the idea!
I like the black background. Did you get it this black when photographing, or was it necessary to darken it in post processing?
Thank you very much for that information.
Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo