90060 HD High Magnification Stargazing and Moon Viewing Telescope

Model: 90060

Eyepiece: H20mm, H12.5mm, SR4mm 5X24 star finder 1.5x orthoscope 3x Barlow magnifier 90 degree zenith mirror Moon filter 1.25m aluminum tripod Tripod tray, support Install a full set of fasteners for the telescope.Gadgets

Main indicators:

Refraction type/focal length: 900mm, luminous diameter: 60mm Can be grouped 45 times, 72 times, 225 times plus 1.5x orthographic mirror can be grouped 65 times, 108 times, 338 times plus 3x magnification mirror can be grouped 135 times, 216 times, 675 times. Visual penetration magnitude: 11.40, etc. Theoretical resolution: 1.842 arc seconds, which is equivalent to seeing two objects 0.893 cm apart at 1000 meters. Light power: 0.109 Handbag carton size: 740mm*240mm*260mm

A.About the function: This lens barrel is about 0.83 meters long, the tripod is about 126CM high, and the gross weight is about 5 kg. The moon ring island can be seen very clearly.(If you want to be exactly like，

B.Regarding the configuration: the focal length is 900mm, the caliber is 60mm, and it is equipped with 3 eyepieces: SR4 (for daytime viewing), H20 (for watching the moon at night) and H12.5 (for watching other celestial bodies).In addition, it is equipped with a 3 times Barov mirror and a 1.5 times orthographic mirror.

C.Regarding multiples: Respectively equipped with eyepieces: SR4mm, H12.5mm, H20mm multiples are: 900/4=225 times, 900/12.5=72 times, 900/20=45 times.Coupled with a 1.5 times orthographic mirror, the imaging is orthographic, and the multiples are: 338 times, 108 times, and 67.5 times.If you do not install a 1.5 times orthographic mirror, but a 3 times Barov mirror, the multiple is: 675 times, 216 times, and 135 times.In other words, if we choose the eyepiece SR4mm and match it with a 3 times Balov mirror, then we can form a maximum multiple of 675 times.That is: the minimum magnification: 45 times, the maximum magnification: 675 times.

D.Calculation formula: Objective lens focal length/eyepiece focal length*Several times Barov multiple = maximum magnification

Objective lens focal length/eyepiece focal length = magnification

E.Note: Only 1 installation can be selected for 3 eyepieces (SR4mm, H12.5mm, H20mm) at the same time, and only 1 installation can be selected for 2 magnifiers (3 times Barov mirror and 1.5 times orthographic mirror) at the same time.The product is taken in kind, and the result is obtained when the product is taken.

F.Of course, the multiple is not the only one, it mainly depends on comprehensive factors such as caliber and focal length.For example, if the windows of the house are large, the light is naturally good, and the view is clear.