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! A young me perched on top of Eric Knowles’ Vauxhall Victor for the Wallasey Gala Procession Photograph – John Lomax When we moved there the rooms were in a terrible state but we cleared them out, cleaned them and converted one of the rooms into a cinema complete with cinema seats and motorised screen tabs curtains , there was a darkroom where I made my first black and white print , a small office and a tea room cum kitchen. At the age of fourteen I became the Club’s secretary and made many films including an award winning twelve minute film entitled “Briquette” which told the story of how house bricks are made starting with the clay being extracted from a local quarry to delivery of the finished article. The film featured a synchronised soundtrack that was initially recorded on a Fidelity Playtime reel to reel tape recorder borrowed off Jim before transferring to magnetic stripe complete with a commentary part of which which I can still recite today and starts
I prefer solidly made binoculars, and have amassed a modest little collection of prized specimens, mostly acquired off eBayUK, but also charity shops and car boot fairs. I used to own a pair of 11×80’s bought off Leo Henzl Jnr in , but I sold them 10 years later. They were too heavy to hold for more than a couple of minutes, and on a photographic tripod, too awkward to point near the zenith. You really need a parallelogram mount for binoculars that size and larger.
I prefer a binocular you can carry with you to a star party, for casual star gazing.
R.P.I. refers to the Retail Price Index, the true cost of the microscope and objectives probably falls somewhere between the R.P.I. and Average Earnings but which ever you use it was a considerable investment at the time for those old microscopists.
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! I am assuming that heavily contaminated and radioactive government surplus items end up in government low level radioactive waste land-fills or other burial sites. So if your government surplus bargain camera or lens is contaminated, it is probably only “lightly” contaminated.
That’s good news, I guess?
Note the cost of the objectives compared to the stand, the higher powers approaching the cost of the stand and box combined showing the difficulty in manufacture at the time. A very gentle buffing with a soft dry cloth has brought back a generally excellent lemon-gold finish with ‘spotting’ consummate with age. The Stand, click on the outer two images for larger versions.
The plain-concave mirror is attached to a long arm giving free movement beneath the substage which in turn slides up and down on a substantial brass rod with a friction clamp allowing vertical movement to provide a reasonable focus on the subject when the concave side of the mirror is in use. Although the scheme is simple it works quite well since the position of the finger controls and fingers resting at the edge of the slide allow fairly smooth movements after a bit of practice.
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.
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.
Primacy was never established and no patent was ever granted for the first telephoto lens. The cell spacing was also tunable, because that could be used to adjust the effective focal length, but that only worsened aberration problems. The Protar was originally called the Anastigmat, but that descriptive term quickly became generic and the lens was given a fanciful name in Schott glasses have higher refractive index than soda-lime crown glass without higher dispersion.
The Protar’s front achromat used older glass, but the rear achromat used high index glass.
List of Batman Family adversaries
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.
NOTABLE EVENTS OF THE PAST. 10 May Company Seven delivered another interesting optical system for NASA to fly later in This is a ruggedized and shock/vibration resistant catadioptric system with all optical components made fully quartz (fused silica), and with superbly engineered and applied high transmission coatings optimized for its designed transmission application.
The lens was one of the latest additions to the system discontinued just after the Millennium. Soon after its release the news spread that this lens is something special – user comments and reviews suggested that it was the best mass production ultra-wide lens ever produced. Due to the rather mediocre alternatives in the EOS land some Canon users were even desperate enough to use it via adapters on their EOS cameras At the peak of this crazy hype it was almost more an investment rather than a purchase.
In addition, the ZF-line remains available, but is now marketed for industrial applications only. According to Zeiss it has been modernized with respect to flare and environment-friendly glass and the optical design has also been altered slightly. According to the Zeiss naming convention “Distagon” refers to a “retro-focus” lens based on an asymmetrical design.
A Guide To Russian LTM Lenses
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. Original American civil war period black leather ammunition pouch.
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.
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.
Mike’s Guide to Buying Old Cameras
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.
In all cases the objective is combined with an eyepiece , used as a magnifier to inspect the detailed content of the objective image. Our ability to see very faint low luminance objects is limited by the area of the pupil opening of the eye, which admits only a small amount of light.
The 39mm screw mount — also called Leica Thread Mount (LTM), Leica Screw Mount (LSM), or M39 — was introduced by Leica with the model I (C), and used on all the Leica models until the bayonet mount mount was adopted on many Leica copies and other 35mm rangefinder cameras.
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. The large exit pupils and extremely large fields of view ensure fast target acquisition and an excellent overview of the hunting situation. The large exit pupils enable fully relaxed viewing: The new centre tube featuring a diameter of 36 mm enables a compact design, as well as a lot of room for optical excellence.
It is also more compact than comparable systems on the market, and therefore stands out with its maximum ease of use. It is an optical masterpiece and a totally new experience in design for uncompromising users who want top performance every time. The adjustment range of clicks enables you to stay on target at distances up to m — another benefit of the 36 mm centre tube diameter.
It can be quickly, silently and intuitively operated even with gloves on. The illuminated dot is automatically deactivated as soon as you put the weapon down. It reactivates as soon as you take aim — a feature that saves time and energy. The 8x magnification also enables fast and reliable targeting. The 10 mm exit pupil enables fast aiming.
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.
In this page we examine the MTF of scanners and sharpening algorithms, and we address the question, “What scanner resolution (pixels per inch or dpi) is required for a digital print to appear sharper than a conventional darkroom print?”.
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.