Thursday, April 24, 2008

helped Clive

Clive just joined the RASC.

He had questions about his eyepieces, their power, which he should use and when.

He quickly received lots of good advice from fellow Toronto Centre members.

I made up an Excel spreadsheet for him. I calculated the power of each eyepiece by dividing the focal length of the tube by the eyepiece. I also calculated the true field of view, assuming the eyepieces were Kellners with the classic 40° apparent field. Told him I found this fact extremely useful when looking at charts...

Emailed it off to him today.

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