ND VARIO FILTER

Flexible light control without changing filters. 

ND Vario Filter為可調式ND減光濾鏡，透過濾鏡內建的轉環，可讓用戶提供1至5級的減光效果。無論您是否想於強光下利用大光圈拍攝淺景深相影像；或進行長時間曝光以提供流水柔美 ，我們的 ND Vario 可幫助您打造完美的照片。對於業餘電影製作人來說，它還為視頻和電影錄製提供最佳的光平衡。

Without B+W ND Vario filter:

With B+W ND Vario filter - 4 f-stops:

With B+W ND Vario filter - 3 f-stops:

With B+W ND Vario filter - 1 f-stop:

TECHNICAL SPECIFICATIONS (ND VARIO VALUES + SIZES)

請注意
ND 減光濾鏡不得用於直接目視太陽觀測（致盲風險）。用戶可於天文學供應商購買用於直接觀察太陽的特殊器材。

• B+W ND 計算器

B+W 免費提供ND計算器APP供用戶下載，用戶可以透過應用程序獲得曝光時間的快速結果，非常適合使用定時器進行長時間曝光的風景攝影。

https://schneiderkreuznach.com/en/photo-optics/b-w-filters/accessories/b-w-nd-calculator-app

• 德國專業光學鏡片

B+W濾鏡鏡片採用德國專業光學玻璃製造，提供極高的透光度，令影像畫質高清通透。

• MRC Nano多層納米塗層鍍膜

B+W T-Pro系列濾鏡採用 MRC Nano (Multi Resistant Coating with Nano effect)多層納米塗層鍍膜，濾鏡底面兩面均有7+1共16塗層，這塗層組合包含多層抗反射成分，以大幅度減少光線的反射。最後一層具有防塵、防油污和防水性能的用作，使濾鏡表面更易於清潔和維護，為鏡頭鏡片提供了全方位的保護。

當水滴落於濾鏡表面時會自行滑落，並不會留下水漬而影響透光度及光線反射率。

另外因為塗層鍍膜會改變光學表面的反射特性，所以一般的濾鏡會令玻璃表面反射約 4% 的入射光線。但採用B+W MRC Nano多層納米塗層鍍膜的濾鏡，只會令玻璃表面反射約 0.5% 的入射光線，從而獲得99.5%的極高透光度，實現更亮麗的顏色及更高對比度的影像。

B+W 新型ND減光濾鏡(Neutral Density Filter)採用經過精細研磨和拋光的優質特種玻璃，這不但保證了光學的質量，亦不會對相應的高質量鏡頭產生任何不利影響。

另外借助B+W出色的薄膜技術，每側濾鏡含有 7 層塗層，這塗層組合包含多層抗反射成分，以大幅度減少光線的反射。最後一層具有防塵和防水性能的用作，使濾鏡表面更易於清潔和維護，為鏡頭鏡片提供了全方位的保護。

• 香港原廠行貨，信心保證

Microworks為B+W香港及澳門總代理，所有經本公司售賣的B+W Filter均為Schneider-Kreuznach原裝正貨，並提供有限保用及技術支援。所以B+W產品也包含高度加密的編碼，用家可以透過B+W官網查驗，輕鬆地確認B+W濾鏡是否為原裝產品。

https://schneiderkreuznach.com/en/authenticity-check

ND Vario Filter

Thanks to its variable density, the first B+W Vario ND filter can be adjusted exactly to meet individual requirements. To this end, it comes with a continuous setting function with which the photographer can determine the required density reduction between +1 and +5 f-stops. 

To prevent aberrations, the light reduction cannot be set beyond a critical level. The XS-Pro Digital ND Vario MRC nano thus guarantees professional image results, even with high filter factors. The newly developed Vario ND filter can be adapted to a wide range of subject situations and photographic requirements. Sometimes large apertures are needed in bright ambient light in order to separate a model optically from the background.

Using several minutes of exposure time, architectural photographers can make people passing through the work space “invisible”. In landscape photography, flowing water or the surface of the sea can be made to appear fluffy and soft like cotton candy.

TIP

With long exposure times, DSLR photographers should cover or close the optical viewfinder in order to avoid exposure measuring errors. At very high densities, slight color shifts in the image may occur.

These can subsequently be eliminated by using white balance or by working in RAW format in the image-processing program.

INFO

Due to different directions of light incidence (light rays scatter differently in the center of the picture than at the edges), an aberration may occur when taking the picture. This first becomes visible in the corners and in extreme cases it can appear in a cross pattern. This becomes noticeable with wide angle lenses 28 mm and less. These irregularities also occur with excessive dimming. As the B+W ND Vario features a stop for the brightest and darkest positioning, this is avoided.

In order to obtain even image results the focal length should not be less than f = 28 mm.