Opticstar ARC-152 QUAD Owner'S Manual Download Page 9

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© Opticstar Ltd 2014

WARNING!

DO NOT USE THE TELESCOPE TO LOOK AT THE SUN!

Opticstar Ltd

87 Washway Road, Sale

Greater Manchester

M33 7TQ

United Kingdom

WEB: www.opticstar.com - EMAIL: [email protected]

Summary of Contents for ARC-152 QUAD

Page 1: ......

Page 2: ...the lens cell will invalidate your warranty Opticstar Ltd 87 Washway Road Sale Greater Manchester M33 7TQ United Kingdom WEB www opticstar com EMAIL info opticstar com LOOKING AT OR CLOSE TO THE SUN W...

Page 3: ...read Heavy heads will work adequately at low magnifications an extra heavy duty geared head with slow motion controls is required for higher magnifications or when fine control is required Finder scop...

Page 4: ...note that the view will not be the right way up and views will differ depending whether a diagonal is used or not If you do not use a diagonal you may need an extension tube to reach focus Using the A...

Page 5: ...favourable conditions you will be able to see several deep sky objects including star clusters galaxies nebulae and comets Such objects with the exception of stars will appear as feint clouds of matt...

Page 6: ...ed view unlike star diagonals A 13 transparency Moon filter will be necessary to observe the Moon with almost all medium to large sized telescopes including the ARC 152 light pollution filters can als...

Page 7: ...cope Magnification can be changed by simply exchanging eyepieces Magnification depends on two factors The focal length of the telescope and the focal length of the eyepiece used To calculate the magni...

Page 8: ...neral use It is possible to calculate the field of view of a telescope given a certain eyepiece using the following formula Actual Field of View Eyepiece Apparent Field of View Magnification where Mag...

Page 9: ...Opticstar Ltd 2014 8 WARNING DO NOT USE THE TELESCOPE TO LOOK AT THE SUN Opticstar Ltd 87 Washway Road Sale Greater Manchester M33 7TQ United Kingdom WEB www opticstar com EMAIL info opticstar com...