Light passes through the guider and falls onto the film in your camera or onto the CCD chip. However, the light of a guide star (from the edge of the telescopeâs circular field, and not from the rectangular area in the center that you are photographing) is diverted to the crosshairs of an illuminated reticle eyepiece by a small off-axis prism within the guider body.
The time difference is 8 hours. Also, there is the International Date Line in the Pacific Ocean, between Arizona and Japan. Therefor, if it is 12:00 PM (noon), on Monday in Phoenix, Arizona, it is 4:00 AM Tuesday in Tokyo, Japan. Japan is 16 hrs. ahead of Arizona.
Tokyo is 16:0 hours ahead of San Francisco. That means when it is 1:00 am (midnight) in San Francisco, it is 5:00 pm in Tokyo (same calendar day). Current time in Tokyo is: Thu, 22 Oct 2015 11:34 AM.