Q1: Can you define focal ratio? Why is this important?
A: A focal ratio is the ‘speed’ of a telescope’s optics, found by dividing the focal length by the aperture. The smaller the f/number, the lower the magnification, the wider the field, and the brighter the image with any given eyepiece or camera.
Fast f/4 to f/5 focal ratios are generally best for lower power wide field observing and deep space photography. Slow f/11 to f/15 focal ratios are usually better suited to higher power lunar, planetary, and binary star observing and high power photography. Medium f/6 to f/10 focal ratios work well with either.
Q2: Does the Z8 Deluxe come with a laser collimator?
A: Yes, the Zhumell Z8 Deluxe Dobsonian Reflector Telescope comes with a laser collimator. This is standard with this telescope.
Q3: Does the Zhumell Z8 have a parabolic primary mirror?
A: Yes it uses a parabolic mirror.
Q4: Is a tracking drive available for the Z8 dobsonian telescope?
A: Unfortunately there is no tracking unit available for dobsonians at this time.
Q5: What carrying case would be appropriate for this telescope. I couldn't find the dimensions listed.
A: Unfortunately we do not carry a case large enough for this dobsonian telescope. The focal length of the tube is just under 4 feet.
Q6: Why is a RA finder showed, a straight on finder on the main image and no finder mentioned in offer? Do you get a finder with this scope?
A: The Zhumell Z8 Deluxe Dobsonian Reflector Telescope comes with a right angle finder scope.