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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Help me choose a spotting scope
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<blockquote data-quote="WildcatB" data-source="post: 260949" data-attributes="member: 10379"><p>I'm not so sure about this.</p><p></p><p>I know that for camera lenses, in general, it is the opposite. That is, given equal quality glass, larger objectives will lower resolution. </p><p></p><p>For example a Canon L 400mm f5.6 with a 77mm objective will have higher resolution numbers than a Canon L 400 f2.8 with a 156mm objective. The f2.8 will let in a lot more light which is why it costs so much more but the f5.6 will out resolve it, throughout the aperture range, and especially wide open.</p><p></p><p>I could be wrong but I don't see why spotting scopes would be any different. It's too bad that no one objectively measures resolution on these so we would know for sure.</p><p></p><p></p><p>Paul</p></blockquote><p></p>
[QUOTE="WildcatB, post: 260949, member: 10379"] I’m not so sure about this. I know that for camera lenses, in general, it is the opposite. That is, given equal quality glass, larger objectives will lower resolution. For example a Canon L 400mm f5.6 with a 77mm objective will have higher resolution numbers than a Canon L 400 f2.8 with a 156mm objective. The f2.8 will let in a lot more light which is why it costs so much more but the f5.6 will out resolve it, throughout the aperture range, and especially wide open. I could be wrong but I don’t see why spotting scopes would be any different. It's too bad that no one objectively measures resolution on these so we would know for sure. Paul [/QUOTE]
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Help me choose a spotting scope
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