It is a lens that mounts on the end of your camera lens. Some are wide angle adaptors (0.75x is an example) and some are multipliers (1.5x or 2x) which move you half the distance to the subject you...
You can use the alternative by editing %system32%/drivers/etc/hosts, first make it writable, then add a line like this: e.g.: 127.0.0.1 97.55.71.253 This wil redirect the IP to localhost. Afterwards,...
You'd have to specify where the mounting point is. Typically, it's an endplate with the single point attachment on it, but there are a few different types out there. Feel free to email me with more...