query: What does "focal length multiplier" mean?
positive_passages.docid: 15644
positive_passages.text: What is crop factor and how does it relate to focal length?
negative_passages.docid: 46148
negative_passages.text: Yongnuo YN-685 underexposure issue in bounce mode at longer focal length
negative_passages.docid: 101960
negative_passages.text: Why are crop lenses indicated with focal lengths they don't have?
negative_passages.docid: 26351
negative_passages.text: What macro techniques offer an alternative to expensive optics?
negative_passages.docid: 113839
negative_passages.text: How can I visualize or simulate the effect of different focal lengths?
negative_passages.docid: 148416
negative_passages.text: What do the different Canon DSLR image size settings mean?
negative_passages.docid: 62822
negative_passages.text: How can lens cause consistent front or back focus?
negative_passages.docid: 139331
negative_passages.text: Why doesn't exposure change when changing focal length?
negative_passages.docid: 128590
negative_passages.text: Is the formula for object image size given focal length, etc. independent of sensor size?
negative_passages.docid: 14565
negative_passages.text: How does background blur (bokeh) relate to sensor size?
negative_passages.docid: 17968
negative_passages.text: Does 4.0-72mm on the lens when equivalent focal length is 24-432mm mean crop factor of 6×?
negative_passages.docid: 84016
negative_passages.text: How many input pixels influence output pixel in an FCN type architecture?
negative_passages.docid: 16777
negative_passages.text: Is there a limit to the resolving power of a mirror telescope?
negative_passages.docid: 13266
negative_passages.text: How much light and resolution is lost to color filter arrays?
negative_passages.docid: 6598
negative_passages.text: How to calculate the correct focal length needed for a subject of a given size and distance?
negative_passages.docid: 150402
negative_passages.text: Is it normal for focal length to change while focusing?
negative_passages.docid: 113163
negative_passages.text: Why do some lenses focus past infinity?