# Tiffen Round Combination Light Balancing 81EF/ND Glass Filter (4.5", 3-Stop) - **Precio:** PEN 1,629.00 (antes PEN 2,506.15) - **Disponibilidad:** En stock - **Marca:** TIFFEN - **Modelo / MPN:** 41281EFN9 - **Comprar:** [Abrir ficha en la tienda](https://prosmart.com.pe/product/prosmart-bhp-54892-REG) - **Datos JSON:** [API de detalle](https://prosmart.com.pe/api/v1/product/details/prosmart-bhp-54892-REG) ## Características - 0.9 Optical Density - ColorCore Glass - Black Filter Ring - 81EF Adds Significant Warmth to Image - Allows Use of Fast Film in Bright Light - Made in the USA ## Especificaciones - **Filter Type:** Solid ND with 81EF Color Conversion - **Exposure Reduction:** 3-Stop - **Size:** 4.5" Unthreaded Mount - **Front Accessory Thread / Bayonet:** No - **Coating:** No - **Filter Thickness:** 0.1" / 2.5 mm 0.3" / 8 mm (Ring/Frame) - **Filter Material:** Glass - **Ring Material:** Aluminum ## Descripción This 4.5" Round Combination Light Balancing 81EF/ND Glass Filter combines the effects of an 81EF light balancing filter with a neutral density filter. 81EF An 81EF filter (the strongest in the 81 series) will more than replace the yellow missing from the image and place all skin tones on a distinctly "warmish" level. You might even consider using an 81EF at the beach to make a hot scene even "hotter." It's Autumn. The clouds are low hanging and the sky is "patchy blue." You've gone for a ride upstate to the mountains and the light in open shade is bluish. A photo taken of your girlfriend with daylight balanced film leaning against the side of a barn will yield bluish tones that she might not find particularly flattering. The 81 series (81A, B, C, D, and EF) allows you to choose how much warmth you wish to replace in the image. Tiffen makes the 81 series of filters in many sizes to accommodate the many uses this filter has. This filter can be used by the pro and amateur alike, weekend photo warrior, or pro cinematographer and must be considered an essential addition to any photo arsenal. Neutral Density Neutral density filters appear gray and reduce the amount of light reaching the film; they have no effect on color balance. They are very useful when you want to shoot high speed film outdoors on a very bright day. Determining which neutral density filter yields ideal results for any given lighting situation takes knowledge, experience, and a collection of such filters. Speaking generally, the 2-stop value (ND 0.6) effectively compensates average situations. Tiffen, a leader in the filter industry, proudly makes its filters in the USA. 81 Series Filters Good for general scenics when the photographer wishes to remove the bluish cast from open shade or just add warmth to the photograph, with an 81EF having the greatest effect The 81EF decreases color temperature from 3900 to 3200 Kelvin Neutral Density Filters Have Four Main Uses To enable slow shutter speeds to be used, especially with high speed films, to record movement in subjects such as waterfalls, clouds, or cars To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their backgrounds To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situations To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand, or other bright scenes that could cause overexposure Neutral Density Factors ND 0.3 (exposure adjustment = 1 stop, reduces ISO 1/2) ND 0.6 (exposure adjustment = 2 stops, reduces ISO 1/4) ND 0.9 (exposure adjustment = 3 stops, reduces ISO 1/8) 81 Series Conversion Factors 81 decreases color temperature from 3300 to 3200 Kelvin 81A decreases color temperature from 3400 to 3200 Kelvin 81B decreases color temperature from 3500 to 3200 Kelvin 81C decreases color temperature from 3600 to 3200 Kelvin 81D decreases color temperature from 3700 to 3200 Kelvin 81EF decreases color temperature from 3900 to 3200 Kelvin