Byomic Junior Telescope 70/300 with 2 eyepieces
- Ideal for the beginner astronomer
- Includes triple Barlow lens for additional magnification
- 2 eyepieces: 20 and 6 mm
- The handle allows for easy operation
- Set up in minutes
- A smartphone adapter for taking photos can be installed later (not included)
- Also for terrestrial observations, similar to a spotting scope
Description
The Byomic Junior 70/300 is a compact telescope that inside can be set up in just a few minutes. The only thing the beginner astronomer needs to do is mount the eyepiece and viewfinder on the telescope with two screws and mount the telescope on the tripod. The telescope is attached to the tripod with two screws that can be tightened by hand . Then all you have to do is turn the hand guide into the tripod and the telescope is ready for use. The tripod has a height of 39 cm when assembled.
The telescope has a triple Barlow lens that enables additional magnification. The Barlow lens is used in conjunction with an eyepiece. In addition to the Barlow lens, there is also an inverted prism with one and a half times magnification. The erecting eyepiece is used when making terrestrial observations.
Videos
 What can you see with a 70mm telescope?
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 Setting up a 70/300mm telescope
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Specifications
| Brand |
Byomic |
|
| Series |
Junior |
| Construction |
Refractor telescope |
| Optical coating |
Standard |
| Tripod Type |
Aluminum |
| Slowmotion operation |
Yes, horizontal |
| Mount |
Azimuthal |
| Lens diameter (mm) |
70 |
| Open ratio |
F/4.29 |
| Magnification |
140x |
| Focal length ( mm) |
300 |
| Tube dimensions (cm) |
30 |
| Eyepiece diameter (mm) |
31.7 |
| Weight (kg) |
1.6 |
In the Box
- 1x Byomic Junior Telescope 70/300
- 1x Adjustable Tripod
- 2x Eyepieces: 20 and 6 mm
- 1x Reversing Prism 1.5x
- 1x Barlow Lens 3x
- 1x Viewfinder
Definition: The Water Column of a Tent
The water column indicates the maximum water pressure that a tent fabric can withstand.
A water column of 1,500 mm means that the tent fabric can withstand the pressure
of a 1,500 mm (1.5 meter) high column of water before water penetrates the fabric.
The higher it is, the more waterproof the tent material is.
Waterproofness
The water column is also a unit of measurement to measure the watertightness e.g.
B. of technical fabrics (tents, functional and rainwear).
DIN EN ISO 811:2018
regulates the method for determining the resistance to the penetration of water.
The following “hydrostatic water pressure test” must be carried out: The outside
of the material is exposed to the water. The water pressure starts at zero, the
water column rises by 100 mmWC or 600 mmWC per minute, depending on the standard.
The time is measured until the third drop can be seen on the inside. The pressure
that is acting at this point in time is then given in millimeters of water column.
Top tents are considered waterproof from 1500 mm
and tent floors from 2000 mm according to DIN.
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