query: How do constant aperture zooms produce identical exposure, even though focal length is larger?
positive_passages.docid: 145622
positive_passages.text: How do constant aperture zoom lenses work?
negative_passages.docid: 70910
negative_passages.text: Can stacking multiple exposure images in post-processing give the same effect as a long exposure?
negative_passages.docid: 148913
negative_passages.text: Image of concave mirror when object is farther than the focal point
negative_passages.docid: 10820
negative_passages.text: What is the formula for percent of frame filled at a specific distance and focal length?
negative_passages.docid: 111238
negative_passages.text: Can you extend a Canon Rebel T5's exposure length?
negative_passages.docid: 67192
negative_passages.text: Cycle Normal Pass in Camera Space
negative_passages.docid: 69119
negative_passages.text: Is the size of the entrance pupil the same as the size of the effective aperture?
negative_passages.docid: 34118
negative_passages.text: How does taking lower-resolution pictures with a higher-resolution sensor affect image quality?
negative_passages.docid: 29080
negative_passages.text: How do extension tubes affect focusing distance?
negative_passages.docid: 75334
negative_passages.text: Why do Full Frame lenses and crop body lenses exhibit the same crop factor when used on a crop body camera?
negative_passages.docid: 14565
negative_passages.text: How does background blur (bokeh) relate to sensor size?
negative_passages.docid: 152115
negative_passages.text: Can I convert binocular zoom to equivalent lens focal length?
negative_passages.docid: 112891
negative_passages.text: Why does the max aperture change when use Nikon 60mm AF-D Micro on D90 camera?
negative_passages.docid: 29406
negative_passages.text: How can I take a photo using a slow shutter speed without it being overexposed?
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: 60038
negative_passages.text: How do depth of field and the circle of confusion relate to pixel size on the sensor?
negative_passages.docid: 88406
negative_passages.text: What does different focal length offer me?