Any thoughts or opinions? Or we could all just own up to the fact that the Hispano was the be all and end all of 20mm cannon and be done with it! Jabberwocky Staff Sergeant. Jul 8, Anything heavier and the MK is head and shoulders above the rest.Cannon Shooting Compilation: 20mm to 76mm
Thanks for those links Jabberwocky lots to read and absorb. First impression is how good the Soviet guns were. Shortround6 Brigadier General.
Thanks for putting all those links in one spot Jabberwocky. I would add that ammo changed during the war and that affected the performance of guns at various times. Tante Ju Banned. Best gun only gun. Soviet B cannon. Very light, great ballistic, great cyclic rate. Like Mauser cannon, developed from actually heavy caliber machine gun Berezhin. However if best gun is considered with ammunition, best gun is Mauser Rate of fire, velocity - almost similiar to Berezhin 20, but heavier.It is used extensively by the U.
It is an externally powered, chain-driven, single-barrel weapon, which may be fired in semi-automatic, burst, or automatic modes. It is fed by a metallic link belt and has dual-feed capability. The term "chain gun" derives from the use of a roller chain that drives the bolt back and forth. The gun can destroy lightly armored vehicles and aerial targets such as helicopters and slow-flying aircraft.
It can also suppress enemy positions such as exposed troops, dug-in positions, and occupied built-up areas. The standard rate of fire is rounds per minute.
With over 11, units sold worldwide, it is one of the most successful modern autocannons. Unlike most automatic firearmsthe M does not depend on gas or recoil to actuate its firing system.
This system uses sprockets and extractor grooves to feed, load, fire, extract, and eject rounds. A system of clutches provides for an alternate sprocket to engage and thus allows the gunner to switch between armor-piercing and high-explosive rounds.
The weapon assembly consists of three parts: the barrel assembly, the feeder assembly, and the receiver assembly. The three-part structure makes it possible for a two-person team to install or remove the system under ideal conditions despite its considerable total weight. The M weapon system has both electrical and manual fire control and can be operated electrically or manually. The gunner can choose from three rates of fire: 1 Single Shot Semi-Automatic, in which the gunner can shoot as fast as the trigger can be operated, limited only by the electrical drive speed it cannot be fired faster than High rate ; 2 Low Rate Fully Automatic, in which the weapon fires rounds a minute, plus or minus 25 rounds; and 3 High Rate Fully Automatic, in which the weapon fires rounds a minute, plus or minus 25 rounds.
The Bushmaster project started as an offshoot of the US Army 's MICV program that was attempting to introduce a new infantry fighting vehicle to replace their existing Ms. Part of this program called for a new scout vehicle to replace the Ma parallel development taking place under the XM Armored Reconnaissance Scout Vehicle.
During the testing phase, the Army eventually rejected the XM and started work on a newer design known as the XM Soon after the XM was also rejected. This led to the combination of the two programs, moving the scout role to the cavalry version of the XM This was essentially a power-driven gun firing similar 20mm ammunition as the HS.
Sincethere have been several enhancements made upon the weapon, resulting in the Enhanced 25 mm gun. To date, more than 10, weapons are in service. One of the major reasons for this popularity is the extremely reliable nature of the weapon.
It has a rating of 22, mean rounds between failure MRBFmuch higher than many comparable devices. A wide range of ammunition has been developed for this weapon, providing it with the capability to defeat the majority of armored vehicles it is likely to encounter, up to and including some light tanks.
35mm or 50mm Prime Lens or Both?
It has the capability to fire U. The wide usage results in several variations and modifications on the standard M weapon system. The M is standard equipment on the U. Work on an upgraded weapon began in In the upgrade program, all three major systems and seven minor systems were improved. The modifications began with introducing a chrome-lined barrel, an enhanced feeder, and an enhanced receiver.
The weapon systems also received minor upgrades such as quick-detachable link covers, a larger breech assembly, a high efficiency muzzle brakelonger recoilan integral round counter, an extended life firing pin and spring, and a triple-spring drive clutch. Inthe U. Navy realized that it needed a replacement for the Oerlikon 20mm Mk 16 series of guns. Inthis requirement was satisfied with the introduction of the Mk 38 Mod 0 weapons system. A derivative of the M system, the Mk 38 consists of the M chain gun and the Mk 88 Mod 0 machine gun mount.
It provides ships with defensive and offensive gunfire capability for the engagement of a variety of surface targets. Designed primarily as a close-range defensive measure, it provides protection against patrol boatsfloating minesand various shore-based targets. Recently, several US Navy platforms have been outfitted with a newer version, the Typhoon Weapon System designated Mk 38 Mod 2  which is remotely operated and includes an Electronic Optical Sight, Laser Range-Finder, FLIR, and a more reliable feeding system, enhancing the weapon system's capabilities and accuracy.Friends, I have recently rediscovered my A1.
I bought it, with the around twenty years ago. For reasons still not entirely clear to me, I put it away a while back. I think I just lost interest. When the muses began to call again, I bought a Contax G2 kit because of the light weight and glass quality.
While it does produce stunning images, I began to want more flexibility than the 28, 35 and 90 primes could offer. Unfortunately, Contax makes nothing larger than the 90, and the 20mm has a price as grand as the field of view.
So I pulled out the old A1, and was thrilled to see how many glass alternatives there are. A very stout lens.
I went shooting today, a wintery one here in Maine, and a perfect backdrop for the snowy egrets that are bobbing out in front of my house. After shooting my Contax for a couple years, I had forgotten how seductive a zoom lens can be. But now I need want something wider than my FD Which would you choose? I shoot a mixture of landscapes, buildings and people. Thanks for your advise. I find a 20mm takes a significatly different composition approach than a 24mm, 28mm, or 35mm.
If you aren't used to working wider than 35mm, then the safest purchase is a 24mm. There isn't a significant difference between a current and 20yr old prime design; however, the same can't be said for zooms where significant improvements have been made in the last 5 years for these focal lengths.
I currently have a 28mm lens on my canon ae1p. I 28mm is not quite wide enough for me, so I looked in to the wider lenses. According to what I read the canon fd 20mm had noticable barrel distortion while the 24mm did not.
I hope this help in your desicion. The 20mm, though, was very useful for cramped spaces and architectural interiors. If you want to photograph a group of 6 or 8 people, for instance, sitting around a small table, a 20mm is a good choice. If you want to stand in a corner and photograph a whole room, 20mm or wider is very handy.
If you're photographing buildings in a city with narrow streets, a 20mm can be handy, but plan on cropping foreground frequently in such situations or look for good foreground interest.
A 20mm is also nice for street photography, since you can stand fairly close to someone and aim the camera right past them so they don't realize that they are the subject of the photo. Eventually I sold off my 20, 24, and 28mm lenses for my FD system, because I found that I preferred to use medium or large format for wideangle photos. When you have a lens that can take in all that information, a larger piece of film gives you a better chance at rendering it in detail.
I don't typically shoot buildings, though. In a quick viewfinder check, for what it's worth, I find that both my 20 and the 24 have slight pincushion distortion.It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War IIand many versions are still in use today. In the Oerlikon S was added to the existing product line.
The purpose of this development was to improve the performance of the gun as an anti-tank and anti-aircraft weapon, which required a higher muzzle velocity. An improved version known as the 1S followed in Three sizes of gun with their different ammunition and barrel length, but very similar mechanisms, continued to be developed in parallel.
In Oerlikon reconsidered the application of its gun in aircraft and introduced the AF and ALdesigned to be used in flexible mountsi. The round box magazine used by earlier versions of the gun was replaced by drum magazine holding 15 or 30 rounds.
In it made an important step by introducing a series of guns designed to be mounted in or on the wings of fighter aircraft. The FF fired a slightly larger cartridge than the AF, 20x72RB, but the major improvement in these weapons was a significant increase in rate of fire. Apart from changes to the design of the guns for wing-mounting and remote control, larger drums were introduced as it would not be possible to exchange magazines in flight.
For the FF series drum sizes of 45, 60, 75 and rounds were available, but most users chose the round drum. The s were a period of global re-armament, and a number of foreign firms took licenses for the Oerlikon family of aircraft cannon. Oerlikon realized further improvements in rate of fire on the 1SS ofand the 2SS of which achieved rpm. However, it was the original SS gun which was widely adopted as anti-aircraft gun, being especially widely used by Allied navies during World War II.
This gun used a grain gram charge of IMR smokeless powder to propel a 2,grain gram projectile at 2, feet meters per second.
.50 cal machine guns vs 20 mm autocannons on US aircraft
Locally produced derivatives of the Oerlikon cannon were used much more extensively, on aircraft, on ships and on land. Later in the war, they also equipped fighters including the Zero with the Type 99 Mark Twoa version of the more powerful and faster-firing Oerlikon FFL. The French firm of Hispano-Suiza was a manufacturer of aircraft engines, and it marketed the moteur-canon combination of its 12X and 12Y engines with a H.
The gun fired through the hollow propeller hub, this being elevated above the crankcase by the design of the gearing. Such armament was installed on the Morane-Saulnier M. The Oerlikon became best known in its naval applications. Initially the Oerlikon was not looked upon favorably by the Royal Navy as a short-range anti-aircraft gun. During the first half of a contract for 1, guns was placed in Switzerland. However, due to delays and then later the Fall of France in Juneonly guns reached the United Kingdom.
All Oerlikon guns imported from Switzerland, inwere mounted on various gun carriages to serve as light AA-guns on land. Just a few weeks before the Fall of France, the Oerlikon factory approved manufacture of their gun in the United Kingdom, under licence.
The production of the first British-made Oerlikon guns started in RuislipLondonat the end of Weapons using this calibre range from anti-materiel rifles and anti-tank rifles to aircraft autocannons and anti-aircraft guns. Only rarely do two designers use the same case length, so this designation is usually definitive. Some cartridge types have additional letters or information about them listed.
From Wikipedia, the free encyclopedia. For the model scale, see List of scale model sizes. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Categories : 20mm sniper rifles Large-caliber cartridges. Hidden categories: Articles needing additional references from April All articles needing additional references.
Becker Type M2 20 mm cannon.There is a reason why a prime lens is called so. We will look at what makes a prime lenswhat the differences are between a 35mm vs 50mm lens, and why you need at least one of them. If you do own a prime lens, then you know how amazing they are. Product links on ExpertPhotography are referral links. If you use one of these and buy something, we make a little bit of money. Need more info? See how it all works here.
When we talk about lenses, we look at two things. We also use words such as prime, standard, telephoto and zoom to describe our lenses. As you can see, we missed out zoom lenses and prime lenses. This is because all of the above lenses come in two forms, either as a zoom or a prime version. A zoom lets you use a variable focal length. A prime lens has a fixed focal length.
There are benefits and downsides to owning zoom and prime lenses. It all comes down to what you are photographing. For more information on the types of lenses that are available, read our article here. Prime lenses tend to be heavier, faster, sharper with a higher level of resolution. They are the perfect partner for low-light conditions and a shallow depth of field due to their fast apertures. With zoom lenses you can quickly change from a wide angle to a telephoto lens with just a flick of the wrist.
A 35mm prime lens has a focal length of 35 mm, which gives you a field of view of This is a great travel companion, as you get to see more of the scene. Having a wider field of view allows you to get closer to your subject, without having to sit on them.
It also allows you to keep a somewhat safe distance, allowing candid moments to happen, and subsequently captured. This lens is great in tight spots, as the wide angle will capture those details just to the side of the main focal area. In terms of compositionthe 35 mm lens is the closest to the focal component of the human eye.
We are immediately used to it as we effectively use a 35 mm every day, all day. This lens is versatile, letting you capture close-ups and landscapes with no problem at all. It lets you be part of the scene and interact more with your subject.A longer maximum focal length allows you to focus in on a small part of a scene, and offers a narrower angle of view than shorter focal lengths.
A shorter minimum focal length allows you to get more of the scene in the photo, and offers a wider angle of view than longer focal lengths. A wide angle lens is great for capturing larger areas of a scene, such as when doing architectural or landscape photography.
This is important if you use filters, as some such as polarising or gradient filters have to be orientated a certain way.
25 mm caliber
A metal mount is generally superior to a plastic mount as it is more durable. Optical image stabilization uses gyroscopic sensors to detect the vibrations of the camera.
The lens adjusts the optical path accordingly, ensuring that any type of motion blur is corrected before the sensor captures the image. Show more. The zoom range is the ratio between the longest and shortest focal lengths. A higher zoom range means that the lens is more versatile.
A true macro lens has a magnification of This means that the image produced is a life-size representation of the subject being photographed. At the shorter end of the lens you get the widest angle of view. This allows you to fit more of the scene into the photograph based on APS-C format. At the longest end of the lens you get the narrowest angle of view. This allows you to fit a small portion of the scene into the photograph, such as when you are zooming in on a subject based on APS-C format.
With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject. Similar to the number of aperture blades, rounded blades affect the way the light gets through to the sensor.
Rounded blades, often only found on more expensive lenses, improve the appearance of the out-of-focus areas. This allows you to attain better, softer looking bokeh in your photos. More blades is often an indicator of a better quality lens. It also allows you to achieve much nicer looking bokeh when blurring out your background, whereas a lens with less blades will often produce harsher, more polygonal bokeh.
This is the closest distance that the lens can focus. A shorter minimum focus distance allows you to get closer to your subject, and is particularly important when doing macro photography. Lenses with built-in focus motor focus faster and more quietly than lenses without a focus motor which rely on the camera's body focus motor.
Lenses with a built-in focus motor can autofocus even if the camera does not have its own focus motor. With full-time manual focus, you can move the focus ring whilst it is in AF autofocus mode. This means that you can make manual adjustments once the AF has finished, without changing to manual mode. Many lenses allow you to focus to infinity.
This is essential when you wish to take photos including far off objects, such as when shooting landscapes, in order to make sure everything is sharp and in focus. Overview Prices. Comparison winner. General info Optics Aperture Focus. Scroll down for more details. Which are the most popular comparisons? General info 1.
Sigma mm F5. Is a wide angle lens. Front element doesn't rotate.
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