query: What features make a lens good for astrophotography/low light photography?
positive_passages.docid: 34411
positive_passages.text: What lens characteristics are important in star photography?
negative_passages.docid: 92561
negative_passages.text: How do I choose a camera for macro photography without considering special lens?
negative_passages.docid: 18161
negative_passages.text: How would one use filters with the "bulb"-like shape front element lenses?
negative_passages.docid: 132425
negative_passages.text: What type of lens will auto-focus on Nikon bodies without a focus motor?
negative_passages.docid: 101960
negative_passages.text: Why are crop lenses indicated with focal lengths they don't have?
negative_passages.docid: 20179
negative_passages.text: How do I get started in Astrophotography?
negative_passages.docid: 54122
negative_passages.text: Why does using a tilt-shift lens make things look miniature?
negative_passages.docid: 48715
negative_passages.text: Photographic techniques to avoid chromatic aberration?
negative_passages.docid: 127
negative_passages.text: What is a good Canon lens to take portraits?
negative_passages.docid: 4389
negative_passages.text: How can a lens with a single focal length focus on more than one plane?
negative_passages.docid: 95649
negative_passages.text: What is the best way to focus when doing night photography or astrophotography?
negative_passages.docid: 44637
negative_passages.text: What are the constructional differences between a macro and a regular lens?
negative_passages.docid: 102289
negative_passages.text: Compound microscope vs astronomical telescope
negative_passages.docid: 141771
negative_passages.text: What is the benefit of a wide-aperture lens if you stop it down?
negative_passages.docid: 69837
negative_passages.text: What is the fastest lens available for a DSLR?
negative_passages.docid: 158181
negative_passages.text: How does the lens diameter influence photo quality?
negative_passages.docid: 47999
negative_passages.text: How do you find out the "sweet spot" of a lens?