Pressing this button all the way takes a photo or starts video recording. But like a DSLR, it’s electronicallycalibrated to provide maximum sensitivity.A ‘half press’ of the button locks focus and exposure, allowing you complete control over your desiredcomposition. Then once your framing is right, continue through to a full press to take your picture.Tip: Pictar’s shutter button allows you to take pictures with gloves on – perfect for extreme sports or in cold weather.