Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What is FP mode or high-speed sync?

April 26, 2017FP High-Speed mode sync

0

Posted

What is FP mode or high-speed sync?

1 Answer

0

Posted

FP mode, also known as focal plane mode or high-speed sync, is a way of circumventing a camera s X-sync limitation. FP flash lets you take flash photos at any shutter speed you like, and works by pulsing the flash bulb at an extremely high rate – 50 KHz – simulating constant light at the cost of total light output. FP stands for focal plane, by analogy to the old FP flash bulbs, though a convenient way to think of it is fast pulse. Only E-TTL capable (type A) EOS cameras support FP mode. (except the EOS 1N, which can partially support FP mode flash via an optional upgrade) More more information on FP mode, how it s often used and what its limitations are, please consult my flash photography article.