query: Question about focusing in the lens?
positive_passages.docid: 20439
positive_passages.text: Do lenses have focal planes or focal spheres/ellipsoids?
negative_passages.docid: 126119
negative_passages.text: Focus in night photography
negative_passages.docid: 104837
negative_passages.text: How to create real tilt-shift lens blur in Blender?
negative_passages.docid: 62759
negative_passages.text: Why am I allowed to turn my focusing ring beyond infinity?
negative_passages.docid: 95649
negative_passages.text: What is the best way to focus when doing night photography or astrophotography?
negative_passages.docid: 51290
negative_passages.text: Does my crop sensor camera actually turn my lenses into a longer focal length?
negative_passages.docid: 75016
negative_passages.text: How to nail focus for DSLR astrophotography?
negative_passages.docid: 20086
negative_passages.text: Why is the amount of light a lens lets in called the 'lens speed'?
negative_passages.docid: 33211
negative_passages.text: How do I diagnose the source of focus problem in a camera?
negative_passages.docid: 151884
negative_passages.text: How do I set focus range?
negative_passages.docid: 1611
negative_passages.text: When setting my Canon camera on a timer, how do I force it to focus at the time the shot is taken instead of when the timer is set?
negative_passages.docid: 153578
negative_passages.text: Variable focal length for macro lenses?
negative_passages.docid: 23545
negative_passages.text: When to use shutter priority instead of aperture priority?
negative_passages.docid: 94098
negative_passages.text: How can I find infinity focus on a kit lens with no markers?
negative_passages.docid: 47999
negative_passages.text: How do you find out the "sweet spot" of a lens?
negative_passages.docid: 141771
negative_passages.text: What is the benefit of a wide-aperture lens if you stop it down?
negative_passages.docid: 8552
negative_passages.text: Which focal-length lens is usually used for portrait photography, and why?