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Lenses
Telephoto
Fast Glass? What does that mean?
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<blockquote data-quote="Pierro" data-source="post: 100708" data-attributes="member: 8517"><p>Yes your first sentence is about aperture, and fast apertures bring / allow more light and faster shutter speeds. As you suspect, fast f1.2 lenses are pretty darn fast, whereas f8 isnt.</p><p></p><p>AS for the difference between several f1.2 lenses, then its down to manufacturing. Glass isnt clear like you say - some have coatings to deal with flare and contrast, and also stuff like control of CA. So despite the light being constant in the natural world, it isnt once it meets up with barriers like DSLR lenses.</p></blockquote><p></p>
[QUOTE="Pierro, post: 100708, member: 8517"] Yes your first sentence is about aperture, and fast apertures bring / allow more light and faster shutter speeds. As you suspect, fast f1.2 lenses are pretty darn fast, whereas f8 isnt. AS for the difference between several f1.2 lenses, then its down to manufacturing. Glass isnt clear like you say - some have coatings to deal with flare and contrast, and also stuff like control of CA. So despite the light being constant in the natural world, it isnt once it meets up with barriers like DSLR lenses. [/QUOTE]
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Fast Glass? What does that mean?
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