www.photomacrography.net :: View topic - Pararobertsite from South Dakota
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 
Pararobertsite from South Dakota

 
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Technical and Studio Photography -- Macro and Close-up
View previous topic :: View next topic  
Author Message
JW



Joined: 23 Feb 2011
Posts: 149
Location: New Haven, CT, USA

PostPosted: Wed Jan 11, 2012 1:59 pm    Post subject: Pararobertsite from South Dakota Reply with quote

I am finally happy with my set-up, having made some small but significant tweaks - addition of a Jin Finance iris (see here) and taking the suggestion from harisA to do some PS work to reduce the purple fringing (see near end of this post.
The iris adds a bit of depth of field, but more importantly significantly reduces flare and CA, the remaining minor CA is mostly cleaned up in PS.

Pararobertsite is related to the similar robertiste, and is an extremely rare mineral named for the preeminent mineralogist of the South Dakota School of Mines, Willard L. Roberts. Most likely originally collected by Roberts, then passed through the hands of the famous micromount duo of Lou Perloff and Julie Weber. The matrix is bobdownsite, another obscure mineral only recently recognized as unique. The locality is the Tip Top Mine, near Custer, South Dakota

Both sets: ZS Dmap method, corrected with Pmax, Canon 10D, 75-300 mm IS zoom tube lens, Nikon CF Plan 10x/0.30 EPI infinity focused objective lens fitted with a manual iris closed down about 2 stops. Dual flash, second-curtain sync manual exposure at 3 sec. shutter speed, with diffusion screen.

47 image stack - about a 1 mm field of view.


100 % crop of above


35 image stack - about a 1.4 mm field of view.


100 % crop of above

_________________
It's not what you look at that matters, it's what you see - Henry David Thoreau
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 -> Technical and Studio Photography -- Macro and Close-up 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