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A binoviewer is one solution - however there are concerns with 'light summation' and how the brain recieves and perceives the image - a bino viewer 'splits' the available light so the image will not be as bright or as contrasty as when viewing through a 100mm binocular. When using a 100mm binocular the effective gain from light is 1.41x so a binocular is equivalent to an aperture of 119mm - using a binoviewer on a 100 mm scope it is equal to 85mm aperture. Restricted FOV is also a concern. It gets very complex and if you google 'light summation in binoculars / binoviewers' it will take you to that other forum where you may go when the nights are cloudy and it is explained in detail.
Last edited by chris lewis; 26-11-2007 at 05:41 PM.
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