Barlow Lens
The included 3x Barlow lens triples the magnifying power of each eyepiece.
See Barlow Lens page 6
USING THE TELESCOPE
With the telescope assembled as described above, you are ready to begin observations.
When using the telescope you may need to adjust one or all three of the adjustments. To
re-position the telescope so that the desired object can be seen
Aligning the Finderscope
The finderscope is your sighting aid. The telescope itself sees a small portion of the sky
that you must have the finderscope aligned on a target to start observing with. Locating
objects simply by looking in the main telescope would be very difficult. Even at the
telescope’s lowest magnification, it is still far too much magnification for locating objects
easily. Basically, a finderscope is a tool for bringing objects into your telescope’s field of
view. Included with the telescope is a 5x24 finderscope.
1. Locate a distant fixed daytime
object. Land objects during the
daytime are a good way to
become get familiar with the
functions and operations of the
telescope. At night if it is visible
try observing the Moon or a bright
star first.
2. Position the telescope so that the
objective lens is pointing at the general direction of the desired object.
3. On the mount of the finderscope there is a sight tube for quick targeting. Generally
viewing through the sight tube, it should then, also be somewhere in the finderscope’s
field of view.
4. Look through the finderscope and focus the image by rotating the eyepiece. The cross
hairs will move while focusing.
Note: When viewing through the finderscope at land objects, items will appear upside
down, this is normal.
5. If necessary adjust one or all three of the adjustments; the horizontal adjustment, vertical
adjustment and mounting plate adjustment to re-position the telescope so that the
desired object can be centred in the cross hairs of viewfinder.
6. Once the object is centred in the viewfinder, it should then, also be somewhere in the
main telescope’s field of view.
Finding Objects
1. With an aligned finderscope, look through the eyepiece of the telescope and center the
object in telescope’s view. If necessary adjust the horizontal adjustment, vertical
adjustment and mounting plate adjustment to re-position the telescope so that the
desired object can be centred. See Notes on Viewing page 7
Note: When viewing through the telescope, items will appear right side up
Note: Depending on the desired object you may or may not need to change the
eyepieces and or use the Barlow lens. When changing pieces on the telescope try not to
move the telescope or tripod, the finderscope may become misaligned.
Focusing
1. Once you have found an object in the telescope, turn the focusing knob in either direction
until the image is sharp.
Note: When focusing, the tube will either extend or retract from the eye piece of the
telescope.
Image Orientation
1. When observing with a diagonal and barlow lens, the image will be right side up
2. When observing with the finderscope the image will be upside down
MAGNIFICATION
The magnification (or power) of a telescope varies depending upon the focal length of the
eyepiece being used and the focal length of the telescope.
The low power (K20) eyepiece is the best eyepiece to use for the initial finding and
centring of an object. It presents a bright, wide field of view, ideal for terrestrial and general
astronomical observing. The higher power (SR4) eyepiece for lunar and planetary viewing.
If the image starts to get out of focus decrease the magnification back down to a lower
power.
The required magnification depends on the object being observed. The following general
guideline is recommended for this purpose: Ideal viewing conditions are obtained if the
magnification is not more than 15x - 20x the diameter of the objective lens, i.e. an optimal
magnification of 100x -125x can be expected with 60mm diameter objective lens to observe
most celestial objects. A lower magnification power is advisable for the observation of stars.
The field of view is wider so that the object for observation is more easily localized. The
highest magnification power should only be used for particularly clear observations of
300 Power, 40070 Starwatcher Telescope
300 Power, 40070 Starwatcher Telescope
4
5
Eyepiece ►
▲
Focusing
Knob
Mounting Plate ►
Adjustment
Vertical Adjustment ►
(Up or Down)
Back View of
Tripod Head
◄ Horizontal Adjustment
(Right to Left)
Adjustments
◄ Sight Tube
◄ Finderscope
▲
Eyepiece w/
Focuser and
Crosshair Adjustment
Finderscope
Содержание 300 Power Starwatcher Telescope 40070
Страница 1: ......
