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Message: <blockquote data-quote="henry link" data-source="post: 3356927" data-attributes="member: 6806"><p>There is an easy way to simulate the image brightness that can be expected from the 1.6x extender at 96x. Just place a 55mm aperture mask on the 88mm scope and set the magnification to 60x. That will produce the very same exit pupil size and the same image brightness as 96x at the full aperture. The mask doesn't have to be anything special. Something cut from stiff black paper and taped to the front will do.</p></blockquote><p></p>