Dihua St. (迪化街) north of Beimen station is a historic street with tons of old buildings and shops and lanterns that might make for some good pics! Don’t know about the specifics of your camera request, but there’s a whole block of camera shops just south of Beimen station (if you just look up “camera stores” around the Beimen area on any maps app they should all pop up). Hope that helps and enjoy Taipei!