Hello, Recently I bought a DSLR canon EOS 1200D actually I didn't understand what is focus lock. Actually I'm bit confused cause when I press shutter button halfway the picture will focus or focus lock actually I didn't understand the exact meaning of 'focus lock' and recompose' help me please. Does focus lock means focus won't appear in the photo I mean will photo capture without focus? also I wanna ask the built-in flash in a camera shall I raised it with any button or it will raised automatically
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