query: What factors make a lens brighter?
positive_passages.docid: 141771
positive_passages.text: What is the benefit of a wide-aperture lens if you stop it down?
negative_passages.docid: 88406
negative_passages.text: What does different focal length offer me?
negative_passages.docid: 145622
negative_passages.text: How do constant aperture zoom lenses work?
negative_passages.docid: 34286
negative_passages.text: Intuitive explanation for why blue light is refracted more than red light?
negative_passages.docid: 129613
negative_passages.text: Why does illuminance stay the same for a given f-stop even when focal length changes?
negative_passages.docid: 93222
negative_passages.text: How does sensor size affect the brightness of an image given the same field of view and aperture?
negative_passages.docid: 32532
negative_passages.text: how to model the exponential growth of luminosity when you flick a light on
negative_passages.docid: 105343
negative_passages.text: Interference at the focus of a convex lens or a concave mirror
negative_passages.docid: 76710
negative_passages.text: Does Dim Light created by an effect override Bright Light in an area?
negative_passages.docid: 65989
negative_passages.text: How to improve image sharpness on Canon 700D?
negative_passages.docid: 104041
negative_passages.text: What does a lens hood do?
negative_passages.docid: 36265
negative_passages.text: Why do I get blurry pictures when I take a lens attachment off?
negative_passages.docid: 2349
negative_passages.text: Does white balance totally correct color shift due to lens glass or coating?
negative_passages.docid: 40309
negative_passages.text: Glass acting as a lens?
negative_passages.docid: 85837
negative_passages.text: What's the difference between real and effective aperture?
negative_passages.docid: 86838
negative_passages.text: What do the red values mean on the distance scale of a lens?
negative_passages.docid: 59198
negative_passages.text: How does an apodization filter improve bokeh?