Long focus lens design books

Thankfully, there are a multitude of books on lens design, starting with the optics theory, optical system design, manufacturing technology, and yes, lens design methods too. The focal length of a lens, or of a curved mirror, is the distance at which it brings incoming light to a focal point, or simply focus. Introduction to lens design with practical zemax examples. A practical guide crc press book a practical guide to lens design focuses on the very detailed practical process of lens design. The short focus travel on the laowa 100m makes finetuning focus at both macro and portrait distances a little difficult.

As a manual focus lens, it will be passed over by the masses, but if you arent put off by manual focus and take a chance on this lens, it will probably become one of your favorites for a long time to come. These precision tinted lenses can help prevent headaches and migraine associated with computer use. By comparison, i own the excellent and somewhat similar voigtlander 65mm f2. A course in lens design springer series in optical. I worked with that lens for seven years, not fully realizing the incredible benefits of the really big glass until some guy let me look through his 600mm. If it had those two things, it would be pretty much the perfect lens. Your camera is a small, portable darkness, and the lens is its window on the world. Petzvals landscape lens, the orthoskop, featured a double combination of lenses, which allowed for greater sharpness and flatness of field than the ordinary single lens of the day. Fundamentally a telephoto design is used to make a lens body shorter than its focal length, for practical reasons what if your 18300 ultrazoom was actually 30cm long. In spite of that, a lot of lens design books and textbooks that i have read rely heavily on. My first long lens, purchased back in 1983, was the canon 400mm.

Lenses and depth of field university of california, irvine. Lens design fundamentals rudolf kingslake, applied optics and optical design part 1 and part 2 a. Can be used with ishoot quick release plate qs120 sold separately, or qs350 sold separately, installed between longfocus lens and camera body, sharing the weight of the camera mount, to protect long focus lens and camera mount from damage, but also increase stability. It is used to make distant objects appear magnified with magnification increasing as longer focal length lenses are used. It adds impressive building blocks to the foundation established by a. The lens collects light from the outside universe and focusses it onto the film.

If you read print books and find that you have difficulty focusing or your eyes get tired quickly, then readers may be what you need. A refracting telescope also called a refractor is a type of optical telescope that uses a lens as its objective to form an image also referred to a dioptric telescope. The refracting telescope design was originally used in spy glasses and astronomical telescopes but is also used for long focus camera lenses. By including some other details, it becomes a much more human shot.

A planar design is one with 4 groups of 6 elements, and a flat field design. It makes a nice portrait lens for 8x10, a long lens for 5x7 and its a very long lens for 4x5, but its smaller and lighter than most lenses. Search the worlds most comprehensive index of fulltext books. A large part of this book is devoted to a study of possible design procedures for various types of lens or mirror systems, with fully worked examples of each. The reader is urged to follow the logic of these examples and be sure that he understands what is happening, noticing particularly how each available degree of freedom is used to control one aberration. This is achieved by incorporating a special lens group known as a telephoto group that extends the light path to create a long focus lens in a much shorter overall design. While advancements in the field over the past two centuries have done much to transform it from the former category to the latter, much of the lens design process remains encapsulated in the experience and knowledge of industry veterans.

This book holds a unique place in the optics literature. In photography and cinematography, a telephoto lens is a specific type of a long focus lens in which the physical length of the lens is shorter than the focal length. Long lenses are just one of the ways you can frame your shots. This title is directed primarily towards health care professionals outside of the united states. Net books we recommend for optical design video how tos, hint, tips and secrets for lens design software from qioptiq linos photonics optical design is a highly complex subject. Lenses for design describes and explains the unique, creative process of american industrial designer and educator, josh owen. Spherical aberration is fully corrected by the design itself and ghosting is never a problem. A guide to finding the best lens design for you can be ez. Ultimate guide to sony emount video and cine lenses. A simple lens is a polished piece of glass with concave or convex surfaces. Can a longfocus lens working at a narrow angular field be replaced by a. Design of wide angle and large aperture optical system. Long lens landscapes ebook outdoor photography guide.

Conrady in applied optics and optical design and rudolph kingslake in lens design fundamentals, first edition. Options include single vision, bifocal, trifocal and progressive noline lens designs. In photography, a longfocus lens is a camera lens which has a focal length that is longer than. If a system uses light in some way including any system that uses laser beams, lens design is almost certainly involved. The lens curves are stronger, but not unreasonable and not difficult to make well. Justin reznick telephoto lenses are the most underutilized tool in the kit of a landscape photographer. Lens design fundamentals, second edition, is the most comprehensive treatise to be published on the subject of lens design. The process of designing lenses is both an art and a science. So the modern lens designer may work on lenses that are a long way from your bifocals or pocket 35 mm camera although the compact lens in a pocket camera can represent some clever design and costeffective engineering. A course in lens design is an instruction in the design of imageforming optical systems.

Mostly canon 35mm lens diagramsillustrations and their mtf graphs, but there is a small section on optical design and lens aberrations that is well done for the novice, and is well illustrated. Detailing design methods for a variety of lens forms, this book shows that fixed focus and zoom lenses can be optimized, starting from planeparallel surfaces. Barry johnson is a disciple of conrady and kingslake, and who has a deep background in lens design theory as a professor of optics and many years of experience as a practicioner in the real world of lens design. You can do this technique with any lens, any length, as long as you practice, practice, practice. Design a modern optical system requires the integration of expertise in widely different fields such as, lens design, thermal and mechanical analysis, sensors, etc. Design examples of several widely used modern lenses are provided. It teaches how a satisfactory design can be obtained in a straightforward way.

This edition has been thoroughly updated and contains integral coverage of soft lenses. This lens is mostly used in long focal length systems with longitudinal. Mar 26, 2020 the list of emount lenses keeps growing at lighting speed. The curvature of the lens or mirror surface determines the focal length. I got mentors in different fields to help me with lens designs that i wasnt familiar with. The less the curvature, the longer the focal length. The design of photographic lenses for use in still or cine cameras is intended to produce a lens. The book introduces geometrical optics, optical instruments and aberrations.

Using proper long lens technique, stand between two of the tripod legs so you can follow the subject without tripping over a leg. In this ebook, justin reznick explores the different themes and techniques that will push your creative pursuits to new heights with long lens photography. With practical zemax examples edition 1 available in. Theory is limited to a minimum, and used to support the practical design work. Field guide to lens design 2012 bentley publications. Project by project, owen illustrates and decodes his philosophy and approach to design invention and problem solving. Of equal importance are the analytical tools used to determine the quality of the design. Telescope making wikibooks, open books for an open world. The fujinon 450c is a compact lens with long reach and tremendous coverage. The technique of panning is the tracking of the subject in the viewfinder by moving the whole long lens camera. Long focus lenses are relatively simple to design, the challenges being. Use this book along with julie bentleys online course. Therefore, in this study, we discuss the optical design method of the very wide angle optical system of an internal focusing type that can focus with.

The publishers website states that the book is sewn to lay flat, but its actually very tightly bound. Optical design has a long and storied history, from the magnifiers of. The design of a fixed focal length lens also known as prime lenses presents fewer challenges. Browse the amazon editors picks for the best books of 2019, featuring our. It was fast enough to shoot indoor sports, and the internalfocusing design let it focus from near to far with the flick of a finger. A long lens isolates things so if you just shoot a close up on its own, it can look like something from a nature documentary. As a ruleofthumbs a good long tele lens will always feature two or.

Camera lenses have been discussed in a large number of books and articles. Every step from setup specifications to finalizing the design for production is discussed in a straight forward, tangible way. While the petzval portrait lens forever changed photography almost instantly, the landscape design sat dorment until about 1856. A practical guide to lens design focuses on the very detailed practical process of lens design. Heres a list of emount fullframe and super 35 cine lenses for video filmmakers and cinematographers using sony emount mirrorless cameras, camcorders and video cameras. The ed glass allowed superb optical quality in a superspeed long lens. Long lens tips and techniques outdoor photographer. With the announced intention of helping its new members make better pictures and keep up to date on technique, the camera club has organized a special series of studio groups. Even though this lesson has looked at advanced techniques for the long lens, were still just scratching the surface. The heliar design consists of 5 elements in three groups with cemented doublets, allowing correction of spherical, chromatic, and astigmatic aberrations. We have not included any specific design examples of lenses for largeformat. Focus depth characteristics of lenses with long focal depth. Its function is to bend rays of light by a physical process called.

Lens curvature, width, position, type of glass some can be fixed, other vary with focal length, focus e. Long lens techniques for wildlife photos outdoor photographer. The fraunhofer lens, by contrast, is comacorrected and collimation hardly needs to be done. Which long focus prime lenses are actually telephoto in the. The greater the focal length, the greater the effective magnification of the image. Field guide to lens design 2012 bentley publications spie. Chapter 16 handbook of optics photonics research group. Its very difficult to do this handheld and hold the focus. With practical zemax examples joseph geary, are all great books, just to name a few. Before you faint from sticker shock, bear in mind that cine lenses. If i have to hold a book with one hand while typing with my other hand.

Black art of massaging the merit function optimize for all image locations all wavelengths all apertures. Thus, he is ideally suited to write an uptodate edition of lens design fundamentals. Smith, and optical system design robert fischer, introduction to lens design. Barry johnson, in lens design fundamentals second edition.