Each week roger cicala, founder of, hosts conversations about the art and science of capturing. Field curvature, which is a normal part of lens design, means the corners will have a different focus point than the center. Ultimate aquatech underwater compatibility guide for camera and lens rentals. Dec 30, 2014 most of the worlds fastest lenses today are derivatives of the planar design, including. From photography to videography, film, history, and technology, the show covers a. Why photography fans are geeking out over assembly video. Lenses in a photo system, the lens is most critical lenses are characterized by prime vs. The people at lightmachinery are veterans of the laser and optics world with many years of experience in the areas of optical design, high power lasers, optical fabrication, laser systems, metrology, thin film. This repository contains my own notes made from the book introduction to lens design by joseph m. About i have designed optical systems for the last 54 years and have about 200 us and foreign patents in this field. Dave shafer, camera lens designer at david shafer optical. The nikon lens is manual focus, but since it is an e lens, its aperture diaphragm is also controlled electronically, not mechanically as most nikon lenses are. The week before christmas, roger cicala and his team at lensrentals tore apart canons recently announced 400mm f2. The folks at lensrentals had high hopes for the construction of nikons new ultrafast 105mm f1.
However, they do not test lenses longer than 400mm. The knowledge and skills achieved in this course will prepare participants for advanced level study in optical design. The german optical systems manufacturer, carl zeiss, has had a 168 year legacy in creating some of the worlds best lenses. The folks at lensrentals had high hopes for the construction of. The video assembling the widest fisheye lens ever was posted earlier this month and he wrote a detailed blog about how it was. Dec 03, 2016 the folks at lensrentals had high hopes for the construction of nikons new ultrafast 105mm f1. Im working with another company designing some simple, manualfocus prime lenses. Click on document introduction to lens design with practical zemax examples pdf. Setting up an optical testing station lens rentals blog. Thats the topic of this technical blog post by lensrentals founder roger cicala. You might notice the lens frontocuses 3 feet in front of the subject at 20 feet if you pixel peep, but since the depth of field is 10 feet the subject is still in focus and the lens seems fine. For this lens, replacing a broken filter ring means a major disassembly to replace the front barrel. But since our alignment is square and centered to the chart, the 4 corners should all focus at the same point.
The blackmagic pocket cinema camera has become a popular camera with its small size think. Field curvature a laymans guide or how to focus a tricky lens. All are for folded zooms, which provide an interesting study. Kidger, intermediate optical design, spie press, 2002. The people at lightmachinery are veterans of the laser and optics world with many years of experience in the areas of optical design, high power lasers, optical fabrication, laser systems, metrology, thin film coatings and custom machinery fabrication.
Field guide to lens design 2012 bentley publications. Most of these have curvature somewhere in the aperture. In the cinema world the cooke speed panchro and angenieux stype lenses are planar derivatives. The bmpccs micro four thirds mount offers a wide choice of native and adaptable lenses. He regularly authors articles that are chockfull of information and insight on his companys blog. There are also many useful figures to help visualize the main issuesconsiderations of lens design. Other references welford, aberrations of optical systems laikin, lens design smith, modern lens design malacara and malacara, handbook of lens design korsch, reflective optics kingslake, optical system design kingslake, history of the photographic lens cox, a system of optical. Introdution recently, global optimization algorithm is widely applied in optical design, regardless of fixed focal lens or zoom lens system. I will probably describe the lens as very good, but not descend to complete flaodom. We have links on each lens page to a pdf of the user manual.
Geary, some miscellaneous notes on zemax, and some. Zoom lens design of mobilephone camera with globalexplorer. Introdution recently, global optimization algorithm is widely applied in optical. The zemax code in the book is a bit dated by now but most users should be able to still use. If you want to evaluate the optical design of a lensor even more. Every step from setup specifications to finalizing the design for production is discussed in a straight forward. Posts about lenses and cameras written by scubagal, edward t.
This is a much newer design than the first two lenses, and perhaps is showing us what recent advances in design, lens shaping, and glass mixtures have accomplished. The process of designing lenses is both an art and a science. This lens has much less astigmatism than either conventional triplets or tessars and can. Mar 22, 2018 if you want to evaluate the optical design of a lensor even more interestingly, the manufacturing consistency of a line of lensesmtf can be a great resource. Optically adjusting the lens identifying a bad copy. The zemax code in the book is a bit dated by now but most users should be able to still use it for newer editions of the software. This lens which taylor hobson called the opic led directly to development of the schneider xenon and zeiss biotar photographic lenses. I apologize in advance for my opinion that some might find objectionable but i think lensrentals are just. From photography to videography, film, history, and technology, the show covers a wide range of topics to educate and inspire creators of all kinds. Our interest was piqued upon coming across a recent post on the lensrentals blog that provided a detailed breakdown of mtf for the inexpensive, small, lightweight, indie veydra. It gives users who have come up shooting on various red configurations and are familiar with the workflow, color science, etc.
What i like about lensrentals blog tests is that they test many samples and report the average and in many cases, standard deviation as well. Every piece of 3d design software from autodesk, including maya, an industry standard for 3d animation, and fusion 360, the cad platform lensrentals uses for all our 3d printing design, come with free 30 day trials by default. Jun, 20 the diaphragm control is still exactly the same as nex its just that sony doesnt have any support for a separate onlens setting dial so the lens doesnt have it for that platform. The lens were doing here is one of the simpler ones. Lens rentals recently completed optical tests on tamrons sp 35mm f1.
As i described in a paper at the 2014international optical design conference, this class of optics is interesting be they are of a reasonable complexity that the designs are likely to be instructive, they offer a small range of design constraints because of the standardization of cmos imager sizes. Underwater housings for cameras, lenses, and flashes allow you to shoot photos. The challenge of testing camera lenses by norman chan on oct. In lens design with large computers, proceedings of the conference, institute of optics, government superintendent, rochester, new york. But historically, designing wideaperture, wide focallength lenses is difficult, and i think the field plots show this. Lens design opti 517 syllabus university of arizona. A practical guide to lens design focuses on the very detailed practical process of lens design. This lens is characterized by a triplet construction followed by a rear element that is strongly meniscusshaped, convex to the image plane.
The camera more than 4k af points which is really insane. A comprehensive guide to camera lens design and zeiss. 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. Rent camera equipment, camera bodies, lenses borrowlenses. Camera gear rentals is big business, and lensrentals proves it. Why photography fans are geeking out over assembly video of.
The rf versions of this lens completely oversize and. Tim ashley and roger cicala discuss field curvature in lens design and the. Lens design, camera zoom lens, cmos sens or, optimization, global explorer, mobilephone camera lens 1. Design for near and distant viewing distances is essentially identical. This practical, handson course will provide you with the fundamental principles in optical lens design. When a lens is designed to be repairable, the filterhood ring is a separate part, and you take out three screws and replace it in 10 minutes. Even more generously, autodesk offers free 3year licenses to all students. Jul 16, 20 camera gear rentals is big business, and lensrentals proves it. Canon eos r mirrorless camera is out from a while, one of the camera to have fullyvariangle display screen with blazing fast af system. Penelope przekop 2008 aberrations fiction introduction to lens design. Jan 03, 2019 the week before christmas, roger cicala and his team at lensrentals tore apart canons recently announced 400mm f2. Geary, some miscellaneous notes on zemax, and some notes based on zemax knowledgebase articles with proper links and attribution of course.
Design examples of several widely used modern lenses are provided. Introduction to lens design with practical zemax examples pdf. As i described in a paper at the 2014international optical design conference, this class of. One year limited warranty document, each lens also includes an envelope, titled 5 years of protection. I agree, my personal experience in calibrating about two dozen 200500s is that this lens has a lot of sample to sample variation. While the canon teardown was fantastic in its own right, it was only the first step of the process.
A fisheye lens is defined as a type of ultrawide angle lens showing a distorted, spherical view of the world, evident in curved, outer corners of the photo. This is really quite handy, so that your 500mm lens doesnt have to be 500mm 20 inches long. Ultimate aquatech underwater compatibility guide for camera and. Head on over to the lens rental blog to read cicalas full thoughts and. Lens options for the blackmagic pocket cinema camera the. How to break a video camera if youve ever called our video department. With additional material by guest contributor roger cicala of lensrentals. The book not only covers theory of lens design but the author also delves into the math using practical examples. The design parameters of optical system are typically to form a complicated multidimensional.
Zoom lens design of mobilephone camera with global. An interesting new wideangle lens type is a fourcomponent form found commonly on the socalled compact 35mm cameras. Its well worth your time as roger cicala picks a bone with nikons. Jul 03, 2012 the lens were doing here is one of the simpler ones. The designs for the mechanical parts run well over a. The diaphragm control is still exactly the same as nex its just that sony doesnt have any support for a separate onlens setting dial so the lens doesnt have it for that platform.
While the canon teardown was fantastic in its own right. Jul 19, 2019 the ranger seems like a natural progression for red as a company. Participants will learn how to design various lenses from simple landscape lens to the complex triplet. Each week roger cicala, founder of, hosts conversations about the art and science of capturing images. It seriously whips the cn competition at the lensrentals site test, and does so where it matters in a fast 24mm in the fat center. Recently, 8 designed a model based on wavelets, which is also able to describe spatiallyvarying blur.
As long as they do, this part of the test is normal. If you want a camera that you can pick up and use without having to page through the manual first. The design can be further modified with an extra element or two, but the double gauss basis is still there. The percival philosophy is similar to that used in modern spectacle lens 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. Every step from setup specifications to finalizing the design for production is discussed in a straight forward, tangible way. This lens is characterized by a triplet construction followed by a rear. Other references welford, aberrations of optical systems laikin, lens design smith, modern lens design malacara and malacara, handbook of. Take a look at a few images from the process above, and head to lensrentals blog for the full teardown. Selfcalibration of optical lenses the computer vision foundation. If you want to evaluate the optical design of a lensor even more interestingly, the manufacturing consistency of a line of lensesmtf can be a great resource. I apologize in advance for my opinion that some might find objectionable but i think lensrentals are just pretending to be something they are not.
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