I did this based of Desmond's previous post on all the different calculations for focal lengths, f ratio, magnification etc.
basically there are only 2 parts to input value (in the alternating green n red)
the first is for mm to inches conversion and vice versa.
the second is to input ur setup's info.
i wouldnt say it is very accurate but at least it is something for u to calculate on. i set the colour to a black background and some contrast with darker colours so u can use it in the dark n wont kill your dark adapted eyes. (or at least not that much). can keep it on ur smart phone and can open with any spreadsheet reader available.
i also locked the the spreadsheet to only allowing the input on sections where inputs are allowed. (column B)
Simple Spreadsheet calculator
Simple Spreadsheet calculator
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- Telescope-calculations.xls
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