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.
Eastern Standard Time is 2 hours ahead of Mountain Standard Time (UTC-7), so when it's 5 AM MST in Phoenix, it's 7 AM EST in Panama City. Eastern Daylight Saving Time (UTC-4) is 2 hours ahead of Mountain Daylight Saving Time, so during the summer, when it's 6 AM MDT in El Paso, it's 8 AM EDT in New York.