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Jumps in Exit Pupil Sizes and Choosing Eyepieces.
Hope this attached guide proves useful to you help choosing eyepieces.
Had to upload in image format because I couldn't get the tabular format to work in text.
To sum up, two ranges of jumps in exit pupil sizes are given according to size/area.
0.5 - 0.7 - 1 - 1.4 - 2 - 2.8 - 4 - 5.6 - 8.
0.6 - 0.85 - 1.2 - 1.7 - 2.4 - 3.4 - 4.8 - 6.8.
These can be multiplied with a telescopes f/ratio to get properly spaced eyepiece focal lengths.
Clear Skies!
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