Bresser Junior 76/300 Compact Instrucciones De Uso página 9

From this formula, we see that if you use an eyepiece with a focal width of 20 mm, you will get the following
magnification:
300 mm / 20 mm = 15 x magnification
To make things simpler, I've put together a table with some magnifications:
Telescope tube Focal width of
focal width eyepiece
300 mm 20 mm
300 mm 6 mm
Possible objects for observation:
We have compiled and explained a number of very interesting celestial bodies and star clusters for you. On
the accompanying images at the end of the instruction manual, you can see how objects will appear in good
viewing conditions through your telescope using the eyepieces that came with it.
The Moon
The moon is the Earth's only natural satellite. Figure 13)
Diameter: 3.476 km
Distance: approx. 384 401 km
The moon has been known to humans since prehistoric times. It is the second brightest object in the sky
(after the sun). Because the moon circles the Earth once per month, the angle between the Earth, the moon
and the sun is constantly changing; one sees this change in the phases of the moon. The time between two
consecutive new moon phases is about 29.5 days (709 hours).
Orion Nebula (M 42)
M 42 in the Orion constellation (Figure 14)
Distance: 1.500 light years
With a distance of about 1500 light years, the Orion Nebula (Messier 42, abbreviation: M 42) is the brightest
diffuse nebula in the sky – visible with the naked eye, and a rewarding object for telescopes in all sizes, from
the smallest field glass to the largest earthbound observatories and the Hubble Space Telescope.
When talking about Orion, we're actually referring to the main part of a much larger cloud of hydrogen gas
and dust, which spreads out with over 10 degrees over the half of the Orion constellation. The expanse of
this enormous cloud stretches several hundred light years.
Magnification
15x
50x
EN
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