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ZERO Black ND4 BTR filters


First camera filter made of high quality 100% optical resin material using nano technology.
The most neutral camera filters on the market, more resistant against scratch, used more UV and
IR substances, more eliminating of fingerprinting, water and oil resistant,antistatic,antifog. The filters are easily
cleaned, absolute black and are resistant to drop impact. After the impact or possible
scratch situation the usability of filters is intact and untouchable in particular for one reason:
COLOR is not applied only on the surface as seen on glass filters but within the
essential material too. There might rise up the risk of getting slight scratches which do not
effect filter's performance (unseen at final images). Very best performance is guaranteed by
combining of various filters.

BTR GRADUAL ND filters have various density throughout filter space (soft transition from light to dark then medium transition from
dark to light). It means that light incoming to camera is reducing gradually. This is very useful in situations where some of parts
of the photography are overexposed (too much bright sky - especially on sunsets and sunrises). BTR is perfect for non-straight horizonts.
BTR GRADUAL ND filters are able to use with full or gradual filters in stacking mode.