價格：免費
檔案大小：42.9 MB
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Choose the right ND filter every time – without the guesswork! This long exposure calculator does the thinking for you. You choose the type of photo you want – like blurred clouds or smooth water – and LEX lists the right ND filters for the job. You can further choose your degree of effect: from bare minimum to upper end.
Features:
* Select the look you want for your photo, from a list of options
* Find out which ND Filters ensure that look
* Time the exposure
支援平台：iPhone, iPad