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All types of 800mm lenses can be classified into three major categories based on the construction of the lens.
Reflex
An 800 mm refex lens with a circular aperture and a unique glass element with a hollow shape that delivers outstanding results.
Prime
With fixed focal length, this lens is great for producing sharp images at 800 mm zoom in all types of shooting, especially in wildlife photography.
Zoom
This lens is more flexible and useful for more applications because it allows focal length adjustment.
Some typical specifications for an 800 mm mirror lens include the following:
Focal length
The focal length, an important optical parameter, defines the distance between the lens and the camera at which objects are clearly imaged. The longer the focal length, the bigger the apparent size of distant items, which is true for short focal lengths.
Aperture
The circular aperture of a mirror lens impacts on the amount of light that passes through the lens to the sensor. In most cases, the aperture ring will be represented by a fixed f-number, for example, f/8, which implies that the lens cannot generate noticeable depth of field and will be ideal for long-distance shots.
Coating
Internal reflections may be minimized and maximized by coating the glass elements with a thin layer in one or more places. The anti-reflective coating improves contrast by cutting down flare and ghosting, which are only lessened by other coatings.
Material
The 800 mm mirror lens is most usually made of high-quality glass to ensure maximum image accuracy. In some cases, additional types of glass, such as flint glass and crown glass, are more commonly used to make lenses because of their characteristics.
Durability
Dust, water, and scratches may be resisted by features such as weather-sealed construction or high-quality glass elements, improving the useful life of an 800 mm mirror lens.
Many industries and recreational fields use the 800 mm mirror lens to take pictures from a distance.
Sports
Most professional sports photographers use the lens to capture the action from a long distance. The added magnification allows photographers to take clear, detailed images of fast-moving events from a distance.
Wildlife photography
A crucial tool for most wildlife photographers, an 800 mm mirror lens, enables them to take pictures of animals from a safe distance without frightening them. Such lenses are preferred for safaris and birdwatching tours.
Surveillance and security
In these sectors, 800 mm mirror lenses are also applied to help operators see far-off areas and target locations or activities of interest, providing valuable information for threat assessment or procedure monitoring.
Astronomy
The 800 mm mirror lens is an important component of astrophotography, which is used to photograph celestial objects such as planets and stars. By focusing on small details within our solar system, this lens allows amateur and professional astronomers to take fine pictures of deep space.
Forensics
In the forensics department, crime scene investigation employs an 800 mm mirror lens to examine evidence from far away and capture thin detail photographs of pertinent evidence, which is significant for documentation and analysis.
Commercial drone imaging
In commercial drone imaging, 800 mm mirror lenses are used to capture high-resolution images and videos from significant altitudes, giving industries, including real estate and construction, a new perspective on their projects.
When choosing the right 800 mm mirror lens, several factors should be considered to meet the required needs and objectives.
Camera compatibility
Ensure that the lens matches the type of camera mount to allow proper usage and functionality. Because of the mount variations, buyers will need to find out which mount their cameras use before purchasing an 80 mm lens.
Budget
These lenses are sometimes quite expensive depending on the brand and model. When looking for a good lens purchase, individuals do not necessarily have to break the bank but should consider what they want from a lens in terms of quality and performance.
Image quality
Look for features such as anti-flare coating, high-quality glass elements, and low-distortion technology to improve lens performance and image quality.
Stability
Because they are shorter, telephoto lenses are prone to camera shake. The best stability features, such as optical image stabilization, should be preferred to help achieve clear images with no shakes at all.
Brand reputation
Brands that have developed their expertise in the optical mirror lens industry tend to sell quality products. Check user feedback and brand history to determine the quality lens.
Weight and size
Find out the size and weight since telephoto lenses are bigger and heavier, which may affect photography, mainly when the shooting is handheld. Consider carrying or using a tripod while selecting the lens for comfort and convenience in handling.
A1: A mirror lens is a type of camera lens that uses a reflecting optical system based on mirrors rather than refractive glass elements to bend and focus light in a compact, unique form. This system is also known as catadioptric. It's quite famous for its donut-shaped aperture and long focal lengths, ideal for capturing distant subjects, especially in astrophotography, wildlife, and sports photography.
A2: The major advantages of the 800 mm mirror lens include: great compactness because of the use of mirrors; excellent for long-distance photography, little chromatic aberration occurs, probably due to the lens system, and thus a sharper image is achieved; especially designed for shooting planets, stars, and other celestial objects. This lens has a good amount of light, which will make the image clearer when taken in the dark background of the night sky.
A3: Some disadvantages include: due to its unique construction, out-of-focus images look different from standard lenses, sometimes referred to as 'cat's eye effect'; limited maximum aperture, ensuring less light capture, hence not effective in low-light conditions compared to other photographic lenses; despite being primarily telephoto, the working distance has a fixed focal length, meaning it cannot zoom Optometrists simply count on a distance-focusing lens; this lens's design and construction further cause a circular bokeh effect rather than just a smooth one, which many photographers do not prefer.
A4: Mirror lenses are mostly used in wildlife photography to capture distant and small scenes of animals; in sports photography, to get views of fast actions from a distance; in astronomy, to photograph celestial bodies such as stars and planets, in forensics, to take photographs of crime scenes or evidence from a considerable distance; in surveillance and security applications; and in commercial drone imaging to capture clear images from significant elevations. The bokeh and great focal length of this lens make it a good choice in these applications.
