# Valid value for shutter speed based on Focal Length [duplicate]

I was listening to Ben Long videos and he was saying a safe value for shutter speed is 1/focal length So if I have a 35mm prime 1.8 lens, does that mean 1/35 = 0.02 so in my camera panel do the values of shutter speed start as milliseconds? so if it is 20 it means 0.02?

• Does What is relationship between focal length and shutter speed? answer your question (in particular, the first answer to that question)? Dec 4, 2014 at 16:10
• @PhilipKendall Yes, thanks. But so does 0.02 mean 20 for shutter speed? Dec 4, 2014 at 16:18
• In most (every?) camera I've ever used, 20 would mean 1/20s = 0.05s. But as you haven't told us which camera you're using, it's impossible for me to say - and this information should be in the manual anyway :-) Dec 4, 2014 at 16:23
• @PhilipKendall Nikon D-610 Dec 4, 2014 at 16:27
• Also see Where does the ¹/shutter speed = focal length rule for hand shake come from?, although I don't think that's your question. Dec 4, 2014 at 18:08