House pen name
Owen Carraway
Articles are drafted with AI assistance and every number is checked against the formula or the manufacturer's spec sheet.
The byline is the editorial team. One name on the page for the whole editorial team. No nights in the field are attached to it.
The byline
Pages are written as we. The footer on every page says that Focalyard earns from qualifying purchases.
You will not find a job title or a diploma under this name.
The portrait is a line drawing of a slide rule and an eyepiece. It is an illustration for the pen name. It is not a photograph.
Example defaults
Worked examples share one default tube: 203 mm (8 in) and 1200 mm.
You should treat these as defaults for the arithmetic. They are not a list of equipment anyone here owns.
Read next
The formulas and their sources sit on How we research. Editing rules sit on the editorial policy.
The site introduction is on About. Try 1200 mm and 25 mm on the magnification calculator. You should get 48x.
True field and exit pupil for that same pair sit on the eyepiece calculator. A 52 degree field at 48x is about 1.1 degrees.