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.
The trip between New York City (Manhattan) and Boston MA (map) is 216 miles (346 km), taking between 4.5 and 5 hours driving time (car or bus) under normal conditions, less by train or plane. Trip time is between 3 and 5 hours, no matter how you travel. Consider three factors: time, cost and comfort/ convenience.