This is a thorough covering of flower photography, with an emphasis on composition and aesthetics. Many examples show what to do and what not to do. There is a lot of visual humor used, to make the presentation entertaining as well as informative.
Schmidt's three lens corrector for a spherical mirrorDave Shafer
Schmidt's aspheric plate in a Schmidt telescope design can be replaced by a group of three spherical lenses, as Schmidt himself showed, but he died before he could publish anything on this. Here I show many alternate versions to Schmidt's design.
Dennis gabor's catadioptric design and some new variationsDave Shafer
A variety of optical designs are developed and discussed, inspired by Gabor's very simple and largely unknown design. Some are extremely high NA (0.999!!!) with a wide field of view and diffraction-limited correction.
Freeform aspheric telescope with an external pupilDave Shafer
A 4 mirror telescope design with freeform aspherics is described which has a distant external front pupil, for those situations that require this. It is unobscured and has a 10 degree diameter field at f/3.0 on an unvignetted flat image.
Schmidt's three lens corrector for a spherical mirrorDave Shafer
Schmidt's aspheric plate in a Schmidt telescope design can be replaced by a group of three spherical lenses, as Schmidt himself showed, but he died before he could publish anything on this. Here I show many alternate versions to Schmidt's design.
Dennis gabor's catadioptric design and some new variationsDave Shafer
A variety of optical designs are developed and discussed, inspired by Gabor's very simple and largely unknown design. Some are extremely high NA (0.999!!!) with a wide field of view and diffraction-limited correction.
Freeform aspheric telescope with an external pupilDave Shafer
A 4 mirror telescope design with freeform aspherics is described which has a distant external front pupil, for those situations that require this. It is unobscured and has a 10 degree diameter field at f/3.0 on an unvignetted flat image.
Ancient secret codes and wordplay in the bibleDave Shafer
A survey of word play in the bible, plus discussion of "hidden messages" and the "Bible Codes" and debunking them' Also the prehistory of the Hebrew alphabet and its early uses, prior to writing.
Spinoza - going rogue way before Sarah!Dave Shafer
A presentation on the Dutch philosopher Spinoza (1632-1677) - the man, his ideas, and his influence. Mostly visual, with photos, cartoons, and paintings, and much humor.
An examination of several curious practices or references in the Torah, by looking at the Torah in context of the wider world around it, such as practices of the Canaanites and Egyptians. Much use is made of photos and paintings to illustrate the ideas, some of them controversial.
Broad band catadioptric design with long working distanceDave Shafer
A broad spectral band high NA catadioptric design is developed that has a long working distance. The design is developed from first principles and the evolution of the design shows what the process of lens design is like.
A survey of some unusual telescope designs. One has a 20 meter diameter f/1.0 spherical primary mirror while others are suitable for amateur astronomers to make.
Design and optimization of compact freeform lens array for laser beam splitti...Milan Maksimovic
"Design and optimization of compact freeform lens array for laser beam splitting: a case study in optimal surface representation", in Optical Modelling and Design III, Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editors, Proceedings of SPIE Vol. 9131 (SPIE, Bellingham, WA 2014), 913107.
Multiple solutions in very simple optical designsDave Shafer
Several optical design examples show how multiple solutions can exist even in very simple systems. Time spent in looking for them is often more useful then simply optimizing the first solution that you find, which may not be the best of the alternates..
A highly visual presentation of competitive photography principles, with many examples - covering composition, backgrounds, photos of flowers and of landscapes, etc. with many prize winning photo examples. Liberal use of humor.
Ancient secret codes and wordplay in the bibleDave Shafer
A survey of word play in the bible, plus discussion of "hidden messages" and the "Bible Codes" and debunking them' Also the prehistory of the Hebrew alphabet and its early uses, prior to writing.
Spinoza - going rogue way before Sarah!Dave Shafer
A presentation on the Dutch philosopher Spinoza (1632-1677) - the man, his ideas, and his influence. Mostly visual, with photos, cartoons, and paintings, and much humor.
An examination of several curious practices or references in the Torah, by looking at the Torah in context of the wider world around it, such as practices of the Canaanites and Egyptians. Much use is made of photos and paintings to illustrate the ideas, some of them controversial.
Broad band catadioptric design with long working distanceDave Shafer
A broad spectral band high NA catadioptric design is developed that has a long working distance. The design is developed from first principles and the evolution of the design shows what the process of lens design is like.
A survey of some unusual telescope designs. One has a 20 meter diameter f/1.0 spherical primary mirror while others are suitable for amateur astronomers to make.
Design and optimization of compact freeform lens array for laser beam splitti...Milan Maksimovic
"Design and optimization of compact freeform lens array for laser beam splitting: a case study in optimal surface representation", in Optical Modelling and Design III, Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editors, Proceedings of SPIE Vol. 9131 (SPIE, Bellingham, WA 2014), 913107.
Multiple solutions in very simple optical designsDave Shafer
Several optical design examples show how multiple solutions can exist even in very simple systems. Time spent in looking for them is often more useful then simply optimizing the first solution that you find, which may not be the best of the alternates..
A highly visual presentation of competitive photography principles, with many examples - covering composition, backgrounds, photos of flowers and of landscapes, etc. with many prize winning photo examples. Liberal use of humor.
The beautiful ways to present flowers at your weddingStylish Pedia
We know. You’ve seen thousands of photos and all beautiful, decorated with pictures of flowers adorning the most beautiful weddings. Centerpieces, dance areas, and special corners, shining petals blow. But it is also true that if you’ve seen many images, you may be not already to know or what type of flowers put on your big day and how to present them. To help you clarify your doubts, we suggest the 10 most beautiful forms, elegant and chic to present the flowers on your wedding day.
10 tips and tricks on how to take better pictures of flowers. Everything from depth of field to colors and composition. Also, with pictures taken by me =).
This is a presentation going through the ways you can critique a photo. I learned many things doing this project. I learned about what a photo needs to have a spark to it, and how I can make my photos better. This is a helpful guideline to critique someone else's photo, but even your own photo.
Photography workshop for beginners covering some photography basics including composition and light.
All photographs used in this presentation copyright Kieran Hamilton 2013
Modified freeform offner, august 11, 2021Dave Shafer
An Offner 1.0X relay system can be given a greatly increased field size with good aberration correction by adding to the design two 45 degree flat fold mirrors that are given some freeform aspheric deformation.
A freeform aspheric version of the classic Dyson design gives much improved aberration correction and makes for designs that are fast speed and have a large field size, especially large rectangular strip fields
A wide angle fast speed unobscured freeform aspheric mirror design for the IR is shown to be enormous in size compared to an all refractive 3 element lens of germanium with conventional aspherics and better performance.
A survey of some interesting Gregorian telescope designs includes some with all spherical surfaces as well as some with a 20 meter spherical f/1.0 primary mirror and sub-aperture corrector mirrors.
This document announces the winners of the 2024 Youth Poster Contest organized by MATFORCE. It lists the grand prize and age category winners for grades K-6, 7-12, and individual age groups from 5 years old to 18 years old.
Brushstrokes of Inspiration: Four Major Influences in Victor Gilbert’s Artist...KendraJohnson54
Throughout his career, Victor Gilbert was influenced heavily by various factors, the most notable being his upbringing and the artistic movements of his time. A rich tapestry of inspirations appears in Gilbert’s work, ranging from their own experiences to the art movements of that period.
Fashionista Chic Couture Maze & Coloring Adventures is a coloring and activity book filled with many maze games and coloring activities designed to delight and engage young fashion enthusiasts. Each page offers a unique blend of fashion-themed mazes and stylish illustrations to color, inspiring creativity and problem-solving skills in children.
Hadj Ounis's most notable work is his sculpture titled "Metamorphosis." This piece showcases Ounis's mastery of form and texture, as he seamlessly combines metal and wood to create a dynamic and visually striking composition. The juxtaposition of the two materials creates a sense of tension and harmony, inviting viewers to contemplate the relationship between nature and industry.
This tutorial offers a step-by-step guide on how to effectively use Pinterest. It covers the basics such as account creation and navigation, as well as advanced techniques including creating eye-catching pins and optimizing your profile. The tutorial also explores collaboration and networking on the platform. With visual illustrations and clear instructions, this tutorial will equip you with the skills to navigate Pinterest confidently and achieve your goals.