B+W Filter IR Black Red 830 | 093 | BASIC MRC
For experimental photographs
- Image results with extremely high black and white contrasts
- Green foliage is played bright white
- locks the visible light up to 830 Nm
- Made in Germany
This B + W infrared filter locks the entire visible light, therefore appears completely black and, in contrast to the above IR filter, allows recordings in the pure infrared without the visible red. Transmission only exceeds 800 nm 1%, at 900 Nm to 88 % to increase and remain so high above the sensitizing limit of infrared films.
Due to the lower use of film sensitivity, this filter is rarely used in pictorial photography; But in the scientific field, material research and criminalism, the restriction on the pure IR area is often important. The filter factor depends very much on the lighting and the fitness of the camera.
Tips for digital infrared photography:
Whether a digital camera is IR-sensitive, you can test with an IR remote control. On the web instructions can be found.
The IR focus point is a bit further away than the visible light. With screwed filter, the white balance, automatically or better manually takes place. Digital cameras and camcorders usually have an IR cut filter from their image sensor. In some camera models, there is still a significant residual transmission in the infrared area. Exactly this gap make the B + W infrared filters 092 and 093 take advantage of. Thus, very infrared typical images will succeed when the visible light is locked. This task does the black-red B + W infrared filter 830 | 093 OPTIMAL. Choosing the image section and infrared-related focusing occur before screwing on the filter. The image program optimizes the IR photos: Increase contrast automatically or in the histogram, change color image in SW or play with individual color channels, the red channel remains to maximum. Whether digital or analogue implemented. Infrared photography has always been an experimental character.
Available in the Basic filter detection exclusively with MRC coating
B + W | Basic filter
The basic line filters are characterized by a newly designed rotary ring with optimized design for better grip. The filter frame is made of sturdy brass and is provided with a special functional paint for smooth unscrewing and unscrewing.
The production of all B + W filters takes place in Germany at the highest level with minimal tolerances.
The base material of the filter detection is made of brass; Guarantee for high stability and longevity. The special function lacquer makes it easier with its optimized sliding properties to engage and unscrew the filter. The basic filter detection has a high level of engineering while still low overall height. It can be used at the most common wide-angle lenses without a vignational test. Exact information on the focal length or image angle limit is still not possible because the vignetting does not depend not only by the filter height and the image angle but also from the tube construction of the lens. As a guide for a safe vignetting-free use, in full format 24x36 mm lenses with a focal length from 24 mm and APS-C lenses from 18 mm (about 63 ° diagonal image angle) apply. Despite the small height, additional filters, snap lid or sun visor can be easily and safely attached to the front thread. The filter glass is playful and stress-free in the brass version and thus optimally exactly plan, which guarantees the highest imaging performance.
Another advantage of the basic version: The filter glass is no longer fixed from the front, but from behind with a screw-in ring. This can not loosen up with too tightly screwed up additional filters or sun visors of screwing while unscrewing.
B + W | MRC coating
An essential criterion for an excellent filter is the coating. Quality starts in front of the lens, and there is known to be the filter. A filter must not restrict the performance of an optics. MRC (Multi Resistant Coating) Filters have on both sides a multicoating layer (7 + 1 each), which ensures maximum anti-reflection and thus eliminate disturbing stray light. This allows brilliant colors and higher contrasts to be achieved. Due to the low residual reflection (0.5%), MRC reliably avoids ghost or double images that can be caused by back reflection from the image sensor. In addition, MRC protects the filter from scratches due to increased layer hardness and thus preserves the high optical quality. In addition, MRC is dirt and water repellent. Cleaning gets easier.
