[bojan]

Fahim, you are correct, CCD_Calc requires separate entry for each aperture, or F-setting.

Be aware, that FOV does not depend of aperture. It does depend only of lens FL and sensor size.
Also, FOV does not depend of adapter (unless adapter contain lenses, which I hope yours does not. In that case, there should be factor known, to calculate the final FL).
Aperture will affect the final photo, in terms of required time to record certain stellar magnitude.
It will also affect the appearance of extended sources (nebulae), however as F-setting.



I am using Cartes du Ciel, to show the FOV of particular lens.. there is a button (red concentric circles). If you right-click it, the table will appear wher e you can enter various eyepieces and CCD FOV's.