Mike’s Guide to Buying Old Cameras
Are Your Lenses Really “Hot”?!! Industar 61 lens lanthanum glass Lens Faults Pages Photo. Net on Radioactive Lenses gamma levels.. Radioactive Pentax Lens GM tube sound file.. Govt Surplus “Hot” Cameras and Lenses You will find two kinds of radioactive lenses – those that were contaminated and sold as government surplus, and those that are naturally “hot” or radioactive due to the radioactive elements or radioactive impurities used in their manufacture. If you want to buy some slightly radioactive lenses and cameras, the U. Government has a lot of them for sale – cheap!. Maybe some of those bargains you got on EBAY are “hot” in a different sense than you might have thought!
History of photographic lens design
This is among the last of their sporting optics catalogs published while their products line still resembled those they had made for some decades in the United States. Though soon after the war they and other manufacturers commenced exporting U. Aspects discussed in more detail than in prior editions include: Spotting scopes include the BALscope Sr.
Content scanned from original in our archives in mid resolution and provided by Company Seven as an Adobe pdf reduced size file 7, , bytes. This is available on request only for those of our customers who have made it possible for Company Seven to survive and prosper over the decades.
Finding information about the manufacturers of Soviet-Russian exposure meters isn’t a very faithful task. In the Soviet Union they were seen more as supportive to the unified Soviet facade than as separate economic entities.
The discipline applies to all animal eyes, whether human or not, since the practice and procedures are quite similar with respect to disease processes, while differences in anatomy or disease prevalence, whether subtle or substantial, may differentiate the two. It was believed, by Alcamaeon 5th century BC and others, that this fluid was the medium of vision and flowed from the eye to the brain by a tube. Aristotle advanced such ideas with empiricism.
He dissected the eyes of animals, and discovering three layers not two , found that the fluid was of a constant consistency with the lens forming or congealing after death, and the surrounding layers were seen to be juxtaposed. He and his contemporaries further put forth the existence of three tubes leading from the eye, not one.
One tube from each eye met within the skull.
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Who invented the microscope? A complete Microscope History Like many inventions today there are disputes in origins of the original inventors. The same dispute applies to who invented the microscope. Dating back to the first century when glass was first invented, the Roman’s were investigating the use of glass and how viewing objects through it, made the objects appear larger. Then, in the 13th Salvino D’Armate from Italy, made the first eye glass, providing the wearer with an element of magnification to one eye.
The earliest simple forms of magnification were magnifying glasses, usually about 6x – 10x and were used for inspecting tiny insects such as fleas, hence these early magnifiers called “flea glasses”.
Only the top camera is a real Leica. The other easy way to tell if a Leica is real or not is to look at the top plate. There are often two very glaring differences between fake and .
I have said, in the past, that you should move toward full frame sensors. I have always championed full frame sensors. At the end of the day, full frame sensors beat APS sized and smaller sensors. The whole reason I bought an original x was because it had the largest sensor I could find in a small camera. It had been a number of years since I had shot an APS crop frame sensor. I replaced that with a Nikon D3 full frame and then moved on to the Canon 5d2, also full frame. Full frame cameras are better.
I started shooting personal work with my little Fuji. Then I pulled it out on jobs from time to time because I loved that little camera. Then I used it more. Then I got the X-Pro1.
Today, sunglasses have taken their place and hats are worn by only a very few men. While they certainly protect your eyes, they are also an excellent way to add personal style to your outfit. With that said, there are some hard and fast rules one should adhere to when wearing shades. As with many an accessory, there is a right way and a wrong way to wear them.
“The principal task of the sniper is the destruction of the most important enemy targets he can find.
British Society of Cinematographers — Professional organization Broncolor Manufacturer of the best quality lighting tools for professional image makers for over 50 years. Brother International Corporation http: The AiRScouter is an innovative viewfinder solution that puts an HD display where it’s most convenient: With over 30, products in 4 locations, and a team of highly knowledgeable sales representatives, you can rely on Bulbtronics to identify and deliver exactly what you need with a service level that exceeds expectations.
We carry a variety of cable protection devices and are excited to introduce our newly designed protectors with a locking lid design and hidden interlock, making them a perfect choice for cable protection and safety for pedestrian and vehicle traffic. We design, manufacture and distribute our products throughout North America. Camadeus Film Technologies www. The team of experts at camadeus always strives to deliver only the most sophisticated equipment available to their clients.
Camera Control is the premier provider of motion control equipment and services in the USA. Based in Santa Monica we serve the whole North American market. Our staff of operators have decades of experience and are always available for consultation.
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Uploading of these items now ongoing. Several new items recently listed on our sister website at www. More militaria now to be uploaded onto our sister website Bridgehead Militaria so please take a look: Updating Saturday 20th October. Always looking to buy quality militaria , single items or whole collections.
Summary Of Zeiss Trademarks: below is a collection of logos from articles and literature in the collection of Company Seven. These are the major logos and trade names that identified the companies, or some subsidiaries. This is not including all trade names (Contax, Contessa, etc.) or variants of the main trademark (Carl Zeiss London, etc.) that Zeiss companies employed.
Glasses designed for cycling usually cover more of your face than fashion eyewear for better protection, and use tougher lenses. Many manufacturers offer interchangeable lenses so you can tailor the glasses for the conditions. Photochromic lenses automatically darken in bright sunlight so you can use the same glasses in a range of conditions. Most top eyewear makers offer them; ask your optometrist.
Why wear cycling sunglasses? What should you look for in a pair of cycling sunglasses? The frames are usually thinner and they’re made from lightweight and durable materials, and the lenses are lighter too, typically shatterproof and they come in a vast rainbow of tints to suit different lighting conditions. Fit Fit is the a key criteria when choosing a new pair of cycling sunglasses.
Some manufacturers offer sunglasses in a narrow design or a women-specific fit, but the vast majority of sunglasses are unisex with a one-size-fits-all design.
More Versatile Largest zoom range A hunt is unpredictable — one of the reasons for its appeal. The large zoom range of 1. Furthermore, the optics feature unparalleled speed.
Notes: The site still exists, but many of the pages seem to be no longer maintained and available and I have not been able to reach the original site developer, Robert Monaghan, who collected and edited the following information from use net postings.
An excellent opportunity to collect high quality photographic prints and support this website. Sharpening Sharpening increases image contrast at boundaries. This enhances perceived sharpness and detail, although it doesn’t increase actual information content. Sharpening can be overdone: But the right amount definitely enhances an image. Although sharpening can be performed during the scan or in the digital camera, it is usually best done late in the image editing process.
A simple sharpening algorithm subtracts a fraction of two neighboring pixels from each pixel, as illustrated on the right. The thin black curve is the input to the sharpening algorithm: The thin red curve the impulse response that results from sharpening— the sum of the black curve and the two blue curves, normalized to the same amplitude as the input.
The thick black and red curves shifted up and left are the corresponding edge responses before and after sharpening. Ksharp is the sharpening constant related to the slider setting scanning or editing program. V is the shift used for sharpening.
It is one of series: Included at the end of each page is a list of Further Reading that identifies the sources used and points to additional information available online. On this page, diagrams schematically represent the telescope objective as a single refracting lens, but it may without changing the optical characteristics be a dioptric system comprising one or more lenses , a catoptric system one or more mirrors , or a catadioptric system a combination of mirrors and lenses.
My Photographic Beginnings. The first camera that I owned was a Kodak Brownie that was a present given to me by my brother Jim when I was about ten years old.
My Photographic Beginnings The first camera that I owned was a Kodak Brownie that was a present given to me by my brother Jim when I was about ten years old. I used the camera for family photographs but not for “serious” photographs and very few images survive that were taken on this camera. This was replaced a few years later by another camera It also and had an accessory shoe and sync socket allowing use of a flash unit.
Needless to say his interest rubbed off on me. I only had a couple of accessories to start off with The tripod was a pain to carry as the legs did not fold!
The following items can be found on the A2Z Military Collectables website , with full descriptions, photographs and prices. This one is made of solid bronze and awarded to native bearers and servants; it has two clasps, the Tirah and the Punjab Frontier This medal is in excellent condition but all the naming has been erased; but both clasps are correctly attached and it comes on its original ribbon. A very fine medal, a superb gap filler.
Eye surgery, also known as ocular surgery, is surgery performed on the eye or its adnexa by an eye is a fragile organ, and requires extreme care before, during, and after a .
A Carl Zeiss teaching eyepiece adapter. The central eyepiece fits into the standard eyetube of any monocular microscope. It has a pointer system that can be introduced into the field of view and moved to point out specific parts of the slide being studied. On the end of the side tube is a second eyepiece which has independent focusing which ensures the image is in focus for both observers. Date from approximately but still works perfectly. Zeiss Winkel Photosystem Price: Carl Ziess was briefly marketed as Ziess Winkel during the mid ‘s which dates this accessory quite accurately.
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A telephoto lens is made physically shorter than its nominal focal length by pairing a front positive imaging cell with a rear magnifying negative cell. The powerful front group over-refracts the image, the rear restores the focal plane, thereby greatly shortening the back-focus length. The Barlow lens, a negative achromat magnifier invented by Peter Barlow in , is still sold to increase the eyepiece magnification of amateur telescopes.
I’ve owned a Contax G2 since they were first produced, and I’ve loved the camera and its lenses. I spent months comparing Contax and Leica before I bought, and despite a life-long lust for a Leica, I decided any lens or functional superiority the Leica might have would be minimal, and chose the Contax with three lenses (I passed on the superwide and the zoom).
The Memar and Silette focus by estimation. The Super Silette has rangefinder focusing. This is the original and simplest model apparently produced from until the early s. Sears advertised the Memar as “simplicity and quality at a low cost. It has an Agfa Apotar 45mm f3. Apertures go to f Focus is set by rotating the focus ring in front with focus from 3 feet to infinity. It is not a rangefinder – focus distance is set by estimation.
Behind the focus ring is the shutter speed selection ring. The aperture ring is behind that, closest to the camera. There is no light meter. You set the shutter speed and aperture by estimation or a separate light meter. Film advance is with a lever, something fairly advanced for this level of camera at the time. The film advance cocks the shutter and also increases the exposure count.