The off-axis guider allows you to guide your telescope through the same optics that are taking the picture. This eliminates any possibility of guiding error if you carefully keep the guide star centered under the eyepiece crosshairs. But careful attention must be paid to your guiding.
Time difference between Boston and Shanghai is 12 Hours. Current local time in Boston is 2017-04-13, 22:31 EDT and time in Shanghai is 2017-04-14, 10:31 CST. Please fill out the fields below to calculate distance. Search by IATA airport code, city or airport name.
Beijing is located in CST - China Standard Time zone and currently does not observe Daylight Saving Time. Washington DC is located in EST - Eastern Standard Time zone and currently does not observe Daylight Saving Time. There is a -13:0 hours time difference between Beijing and Washington DC right now. Please note that Daylight Saving Time (DST) / Summer Time is taken into account for the calculation of hour difference between these two cities.