1.
A Barlow lens increases the focal length of a telescope without ...
File Format: PDF/Adobe Acrobat - View as HTML The increase in telescope tube length is. S − D . The Barlow lens cannot be placed inside the prime focus by more than its focal length. If ...
2.
COMPARISON TEST OF THREE PLÖSSL EYEPIECE TYPES BRANDON, TELEVUE ...
File Format: PDF/Adobe Acrobat - View as HTML Sep 26, 2008 ... How well does the Brandon and TeleVue Plössl eyepiece design perform on the bright planets? After being subjected to the unending ...
3.
Links_UK
Individual page links _ click on the url Astrophotos of the Northern Constellatioons http://www.slivoski.com/astronomy/ UK ATM Suppliers ...
4.
A closer look at High magnifications
Jan 31, 2002 ... will not often be suitable for Jupiter and Saturn. It is interesting to note the magnifications employed by double star observers. ...
5.
Depth of Focus
File Format: PDF/Adobe Acrobat - View as HTML between the true depth of focus based on the defocusing aberration as given by equation (vi) and the depth of focus derived from equation (ii) for a range ...
6.
Depth of Focus
File Format: PDF/Adobe Acrobat - View as HTML Among the tolerances Cox discussed was depth of focus. ... The formula derived by Conrady is based on geometric optics, and whereas it ...
7.
CALIBRATING a BIFILAR MICROMETER by MEASURING DECLINATION ...
File Format: PDF/Adobe Acrobat - View as HTML awkward was the design of the frames. Instead of being rectangular they were open .... meridian from London. M45 HIPPARCOS INPUT CATALOGUE STARS. HIC ...
8.
Designing & Building a Domed Astronomical Observatory
File Format: PDF/Adobe Acrobat - View as HTML building, some amateurs decide to put their dome on a round or polygonal wall. Transition from Square to Round. Once again a circular wall can be built on a ...
9.
Dome Rail-Roller Optimization
By heaving on the free end of the hemp rope, the heavy timber dome could be painfully inched round. Sometimes it took the combined efforts of either four ...
10.
TMB Monocentric Eyepiece
Dec 20, 2005 ... Chris Lord's comments on Gary Seronik's TMB Monocentric Eyepiece test report Sky & Telescope Aug. 2004 pp98-102 ...
