Lens Nikon Slr

Lens Nikon Slr

Tips to create stunning pictures of night vision Digital Slr

Tips for creating stunning Vision Slr Digital Night photos

Today's digital Slr Cameras offer the photographer full control over aperture, shutter speed and ISO settings to enable the capture of excellent images usable in low light that was not otherwise possible. However, in many situations like the scene in the photograph at night with little ambient light, or telephoto lenses photography at night at a distance, even the best SLR Digital Cameras are simply not sensitive enough to capture adequate images. In these situations, night vision modules, such as those described here are the perfect accessory. This article provides important guidelines to produce stunning night shots when using a night vision module enabled digital Slr Camera.

By adding a night vision module a Digital Slr Camera, night becomes day. Follow these guidelines to ensure the best possible image quality.

Due to the increased availability of high performance digital SLR cameras capture great pictures at night is now easier than ever. With total control settings opening and shutter speed, and the increase in electronics (ISO), the photographer has the opportunity to capture images in low light that was not otherwise possible way.

However, in many low light and night situations, digital SLR cameras just do not have sensitive enough to capture appropriate images. On the one hand, with the shrinking size of the pixels, it is remarkable that sensitivity to light has not worsened considerably with each new generation camera (sensitivity to light and which is directly proportional to the area of detector pixels). But fortunately, there has been much development of the camera in reducing sensitivity to noise has kept pace, if not improved slightly with decreasing pixel area. Despite these changes, it is certain that an exposure time long enough can not be used, either because there is a movement in the scene or the camera is moving (being on hand or in a moving vehicle) for times long exposure would lead to confusion. For situations like photographing scenes at night with very little ambient light, or telephoto photography in night at a distance, even the best digital SLR camera will be unable to produce enough pictures without blur.

href = "http://www.nightvisioncameras.com/"> In these situations, a night vision module, as described here are the ideal (www.nightvisioncameras.com). Such a device is placed between the lens and lens reflex camera body and amplifies the light that is captured by the objective lens, projecting an amplified (but entirely green) image in the image sensor Digital Camera. The result is up to 10 F-stops of improvement, a dramatic change that allows many applications that are otherwise impossible photograph. The module transforms moonlit or starlit scenes into bright images and high resolution that are easily photographed.

HOW WORKS

AstroScope transforms dark scenes, bright images in high resolution that can be easily photographed without additional lighting or exposure times. The objective lens focuses the amounts minutes of light available on the faceplate of your internal drive intensified central converts photons to electrons. The electrons flow is then amplified and accelerated electrons so that its impact on the output phosphor, a color image creates bright green. The image is then focused on the detector's internal digital SLR camera.

Learn More at: www.hownightvisionworks.com

The following are some guidelines to help ensure that night vision digital photos are the best.

Mode exposure

Select Manual exposure mode ("M"). No "Automatic", "aperture priority" "Shutter Priority", "Program" or any of the special modes. In low light, you must manually open the iris lens to allow light more to fall on the photocathode sensitive night vision module.

Adjusting shutter speed

You want set the shutter speed the camera to be long enough that there will be blurring caused by motion, second usually about 1/30th. The longest exposure time usually results in blurred (for applications handheld). Less exposure time may provide some improvement if excessive movement is a concern, but unnecessarily could darken the image due to the reduction of light that was acquired in the form of night vision image intensifier. While the brightness of the output of an image intensifier increased illumination of the scene increased in higher stage lighting, the image intensifier brightness output reaches a maximum and remains constant as shown in the accompanying graph. (The limitation of the output light protects troops vision goggles night to be blind when you see a bright light). Since this maximum brightness is not very bright (about 2 foot lumens), it is unlikely that the camera sensor Digital will be saturated as a result. Therefore, faster shutter speeds are not needed as a method of limiting the accumulation of light.

ISO Setting

While in the days of film photography, ISO was a feature that describes the light sensitivity of film currently, the ISO is related to the increase of the electronic digital camera sensor. Since the increase of the gain to amplify the low light level images, even with a night vision module, the lower light scenes will be visible. However, there are disadvantages to the establishment of the ISO too high. As with all circuits high-gain electronic, image noise can degrade image quality. As such, sets the camera's ISO to a value as high as possible while levels acceptable image noise. In general, the minimum value would be 800, but some cameras offer perfectly usable images at ISO 1600, 3200 or 6400 (in some recent Nikon).

Manual Focus

When using a night vision module, select the focus mode manual (usually a small lever switch on or near the objective lens assembly). Manual focus gives you more control over how the focus appears. Since modules night vision are usually grain, the grain of the image can confuse sensors focus SLR camera. Also, realize that these sensors will focus looking at the module output night vision devices so that the grain will not be affected by the position of the lens (located at the front night vision module).

Use Stabilized Lens

A camera image stabilization feature allows the photographer to use slower shutter speeds without causing the motion caused by camera shake. Keep in mind that there are two main techniques for image stabilization: optical stabilization (where a small element within the lens moves to stabilize the image projected on the detector camera) and digital stabilization (that take advantage of additional rows and columns on the perimeter of the detector, shift the image an appropriate amount to stabilize certain types of motion.)

Typically, optical image stabilizers, although more expensive, are preferable, since better eliminate blur component movement. When using a night vision module, the main disadvantage of digital stabilization is that the image is blurred at the entrance of the vision module night resulting in some blur in the output image intensified. Thus, optical stabilization is preferred.

Lens Aperture

The fundamentals are still valid for intensified night vision in low light photography. In low light situations, you must select the target fastest goal set the lowest value of f-stop. (The lowest value of f-stop indicates that the iris is fully open and will meet most ambient light possible so that the lens).

Nikon and Canon offer quick stabilized telephoto objective lenses that are ideal for night vision applications.

Infrared Illuminator

Sometimes, even with a night vision module is simply too dark to get a picture good quality at night. A dark and cloudy night, with no ambient light is an example. Since the night vision module is only a light amplifier, if no light of the stars and the sky or the city lights reflecting the clouds, the night vision module will not be effective. In order to shoot without using a flash or light source visible, a source of near-infrared light can be used that emits light that can be seen by night vision module, but is invisible to the naked eye. Unlike other sensors digital cameras that have a certain response in the near infrared, night vision modules are more sensitive to the wavelength near-infrared and Therefore, these light sources can significantly improve night-time image and make night photography possible despite the lack of sufficient visible light.

Invisible near-infrared light can be used to illuminate scenes that are otherwise very dark.

Image trimming

Because image intensifiers have automatic features to keep the electronics increase a constant light output, the presence of bright lights in the field of view (such as headlights or street lights) may have the effect of reduced light unit gain general. This is similar to the scenes, back-lit photo by United Nations "was intensified, but even more importantly for the significant impact on the gain of light that could result. This can make affect other regions in the image to darken to an unacceptable level. If possible, do your best to exclude bright lights are not important from the field of view.

Turn off Camera visible / audible Features

For covert night vision photography, do not forget to turn off all the lights of the camera and audio features. (For example: flash off any red-eye reduction mechanisms, autofocus assist, preview LCD screen, and all audible signals).

Use a tripod

When the handheld is not necessary to use selected an exposure time long enough for the motion of objects under observation does not result in blurred images. As with the photograph of United Nations-is intensified, requiring long exposure to keep the camera still to avoid blurring. A tripod is a perfect accessory. If one is not available, try to strengthen the camera against a stationary object like a tree or a wall. To avoid the blur that results from pressing the shutter release (which can cause enough movement to blur a photo), use the camera timer.

For more extensive white papers visit our online Knowledge Center.

www.electrophysics.com / Night Vision

373 Route 46, Fairfield, NJ 07004

Phone: 973-882-0211 Fax: 973-882-0997

www.electrophysics.com

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