References in periodicals archive ?
Cornell and McGavin teach Focusing as a partnership between two people who exchange sessions of equal length, and take turns in the role of Focuser or Companion.
Recently I was commissioned by the York Astronomical Society to design and build a very large Crayford focuser for their 300mm aperture reflector.
3, a document that focusers on short term government solutions supporting the existing biofuels industry, as well as accelerating the commercial establishment of advanced biofuels and a viable long-term market by transforming how the federal government does business across departments and using strategic public-private partnerships.