BRESSER 4964131 Polar Finder Scope for StarTracker PM-100 Instruction Manual
- June 5, 2024
- BRESSER
Table of Contents
BRESSER 4964131 Polar Finder Scope for StarTracker PM-100 Instruction
Manual
General safety instructions
This device is not intended for use by individuals (including children) with limited physical, sensory or mental capabilities or those lacking in experience and/or knowledge, unless they are supervised by an individual responsible for their safety or have received instructions from them regarding the use of the device.
Children must be supervised to ensure that they do not play with the device.
RISK OF BLINDNESS
Never use this device to look directly at the sun or in the direct proximity
of the sun!
CHOKING HAZARD
- Keep packaging material, like plastic bags and rubber bands, out of the reach of children!
- This product contains small parts that could be swallowed by children!
RISK OF FIRE
Do not place the device, particularly the lenses, in direct sunlight. The
concentration of light could cause a fire.
Scope of delivery
Polar finder scope with illuminated recticle
Additionally needed tools (not included):
Hex key 8mm and Phillips screwdriver
Illumination
Before you can switch on the illuminator (1, Fig. 1), you have to remove the
battery strip. Unscrew the cap with the knurling (2, Fig. 1). Remove the
security strip and screw the cap back on. Locate the ON/OFF switch on the
upper end of the illuminator (3, Fig. 1). It also enables you to adjust the
brightness.
Focussing the polar finderscope
Focussing can be done before the installation of the finder scope. Look
through the scope at an object that is at least 100m away. If the image is not
sharp, look through the scope while turning the eyepiece (5, Fig. 1) until the
image is sharp.
Mounting the polar finderscope
Remove the LED illuminator from the finderscope (1, Fig. 1).
Insert the O-ring from the front onto the finderscope (8, Fig. 3).
Put the retaining ring (9, Fig.3) on the pole viewfinder and fix it with the 3 small cross-head screws (7, Fig.1). Tighten the screws evenly so that the pole finder can still be turned in the holder with some resistance.
By tightening the cross-head screws evenly, a sufficiently precise adjustment of the pole finder is made.
Now screw on the LED illuminator again.
Now fix the pole viewfinder to the photo mount (Fig. 2) using the 8mm fixing screw (6, Fig.1) included in the scope of delivery.
Using the polar finderscope
Orient yourself towards the sky. To align your mount to the celestial pole with the help of your polar finder scope, you need unobstructed view towards the northern part of the sky (or to the south, if you are using the telescope in the southern hemisphere, such as Australia).
The following procedure applies to aligning the telescope for the use on the northern hemisphere, such as Europe or North America. Look for the constellation „Big Dipper“. The Big Dipper represents a part oft he constellation „Big Bear (Ursa Major)“. Depending on the season you can see the constellation at different locations at dusk: in the winter it can be seen just above the northern horizon, in spring halfway up in the north east, in the summer almost directly above in the north, and in the autumn in the north west. Figure 4 shows you the northern part oft he sky at dusk in the beginning of january.
The Big Dipper /Big Bear is located directly above the northern horizon. We can spot the three stars that form the handle of the Big Dipper at the middle left and two bright stars at the other end of the constellation (Fig. 6), one of them beeing the star „Dubhe“ in the upper right. We need those „rear“ stars to get tot he North Star (Polaris). If yopu prolong the line that is formed by those two yellow stars oft he Big Dipper you will get tot he brightest star in the constellation Little Dipper/Little Bear (Ursa Minor). This is the North Star (Polaris).
The North Star may be located in the immediate vicinity oft he north celestial pole, but it is not located directly at the pole.For this reason it does circle the pole during the day/year like any other star that circle the celestial pole. We now have to find out on which position on this circle the star is located at this very moment. For this, let us refer to figure 5.
Figure 5 shows the engraving on the recticle of the polar finderscope. You may notice three figures with little circles that are connected with lines. These symbols represent constellations.. To align the mount onto the north celestial pole we need the constellation in the upper left and the constellation below the middle at the right. You may have recognized the left constellation already – it ist he Big Dipper, that we already located successfully. The other constellation is Cassiopeia which we have to locate now. To do this, let us have a look onto figure 6, which is simply showing a bigger part of the sky then figure 4 above:
We recognize the Big Dipper at the lower part in the middle of the field of view, the North Star almost in the middle oft he picture and a constellation at the upper end of the picture just slightly to the right of the middle. This constellation looks like a W turned upside down – Cassiopeia. We have marked stars in each of the constellations for you: the first star in the Big Dippers handle (Alkaid), Polaris and the star at the lower right in the constellation Cassiopeia (Epsilon Cassiopeia). These three stars are forming a line.
Now we are moving the polar finderscope in it´s bracket until the line in the recticle aligns with the orientation of the corresponding line at the sky (Fig. 7).
Please notice the difference tot he image oft he recticle in the beginning of this manual (figure 5): the position oft he constellation symbols in the recticle now aligns with the orientation oft he real constellations at the sky. Now you move the mount only with the fine adjustment knobs for azimut and altitude until Polaris is positioned at the right place in the line in the recticle – we have marked this position already for you with a white dot star. Your mount is now aligned to the North Celestial Pole.
Aligning the mount to the Southern Celestial Pole is analogous to the alignment described above. The constellations that help us orient the recticle are the Southern Cross (or, more precisely its brightest star, Acrux) and the brightest star in the constellation Eridanus (Achenar). The star that has to be positioned into the right place in the recticle is Polaris Australis (Sigma Octans).
Warranty
The statutory warranty period is 2 years. We have confidence in our products, which is why we offer an extended warranty on most. This is noted on the packaging and begins on the day of purchase. To benefit from this extended voluntary warranty period, all you need to do is register on the Internet. To register, visit www.bresser.de/warranty. To claim the warranty, this registration must be done within 3 months from the date of purchase (the date of the purchase receipt is valid). If you register later, you will lose the right to the extended warranty.
For complete warranty terms and services, please visit
www.bresser.de/warranty_terms
Service
Please contact the service centre first for any questions regarding the product or claims, preferably by e-mail.
E-Mail: [email protected]
Telephone*: +44 1342 837 098
BRESSER UK Ltd.
Suite 3G, Eden House
Enterprise Way
Edenbridge, Kent TN8 6HF
Great Britain
*Number charged at local rates in the UK (the amount you will be charged per phone call will depend on the tariff of your phone provider); calls from abroad will involve higher costs.
Errors and technical changes excepted.
Manual_4964131_Polar-Finderscope-PM100_en-de_BRESSER_v012022a
Bresser GmbH
Gutenbergstraße 2
46414 Rhede · Germany
www.bresser.de
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References
- Bresser | Startseite | Expand Your Horizon mit BRESSER
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