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1.56 Ngā arotahi whatu HMC tae whakaahua
Ko ngā karāhe arotahi whakaahua-ira, e mōhiotia ana ko ngā "karāhe arotahi whakaahua-ira". E ai ki te kaupapa o te tauhohenga whakawhiti tae-mārama ka taea te whakapouri wawe i raro i te hihi o te mārama me ngā hihi ultraviolet, ka ārai i te mārama kaha me te mimiti i ngā hihi ultraviolet, ka mimiti noa i te mārama e kitea ana; ina hoki ki te wāhi pōuri, ka taea te whakahoki wawe i te āhua kore tae me te mārama, kia pai ai te whakawhiti o te karāhe. Nō reira, he pai ngā karāhe arotahi whakaahua-ira mō te whakamahi i roto, i waho hoki hei ārai i te kino o ngā kanohi mai i te rā, te mārama ultraviolet me te kanapa.
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1.56 FSV Photo Gray HMC Optical arotahi
Ehara i te mea ka whakatika noa ngā karāhe whakaahua-ira i te tirohanga, engari ka ātete hoki i te nuinga o ngā kino o ngā hihi UV ki ngā kanohi. He maha ngā mate kanohi, pērā i te mate kanohi e pā ana ki te koroheketanga, te mate pūkahukahu, te katarata tawhito me ētahi atu mate kanohi, e pā tika ana ki te hihi ultraviolet, nō reira ka taea e ngā karāhe whakaahua-ira te tiaki i ngā kanohi ki tētahi taumata.
Ka taea e ngā karāhe arotahi whakaahua-ira te whakarerekē i te whakawhiti mārama mā te whakarerekētanga o te tae o te karāhe arotahi, kia taea ai e te kanohi te urutau ki te huringa o te mārama ā-taiao, te whakaiti i te ngenge tirohanga me te tiaki i ngā kanohi.
