query: Confused about different optical zoom on different lens
positive_passages.docid: 146325
positive_passages.text: How is zoom measured?
negative_passages.docid: 85095
negative_passages.text: Selecting optical size?
negative_passages.docid: 40865
negative_passages.text: What should I do when I have lenses with different filter thread sizes?
negative_passages.docid: 9033
negative_passages.text: What is aperture, and how does it affect my photographs?
negative_passages.docid: 154428
negative_passages.text: What is the difference between zooming in and cropping?
negative_passages.docid: 91826
negative_passages.text: How do I install the Ask Ubuntu Unity Lens, and how do I use it?
negative_passages.docid: 105580
negative_passages.text: In Photoshop, how can I open up a view (in the same window) with another zoom level?
negative_passages.docid: 148416
negative_passages.text: What do the different Canon DSLR image size settings mean?
negative_passages.docid: 95190
negative_passages.text: What should I look for in lenses for long range and close up animal and natural shots?
negative_passages.docid: 151884
negative_passages.text: How do I set focus range?
negative_passages.docid: 12768
negative_passages.text: Can I use lens brand X on interchangeable lens camera brand Y?
negative_passages.docid: 113163
negative_passages.text: Why do some lenses focus past infinity?
negative_passages.docid: 136336
negative_passages.text: How to choose a lens for my first DSLR?
negative_passages.docid: 11051
negative_passages.text: Is there a difference between taking a far shot on a 50mm lens and a close shot on a 35mm lens?
negative_passages.docid: 6362
negative_passages.text: Why does the zoom sometimes stop at a point?
negative_passages.docid: 30952
negative_passages.text: What is the difference between EF and EF-S lenses?
negative_passages.docid: 85837
negative_passages.text: What's the difference between real and effective aperture?