query: Lens equivalent depth of field
positive_passages.docid: 19362
positive_passages.text: Can a smaller sensor's "crop factor" be used to calculate the exact increase in depth of field?
negative_passages.docid: 80219
negative_passages.text: What is the relationship between field of view and focal length for fisheye?
negative_passages.docid: 18161
negative_passages.text: How would one use filters with the "bulb"-like shape front element lenses?
negative_passages.docid: 28095
negative_passages.text: Why does a bigger sensor lead to a shallower depth of field?
negative_passages.docid: 113163
negative_passages.text: Why do some lenses focus past infinity?
negative_passages.docid: 38712
negative_passages.text: Diffraction by a lens
negative_passages.docid: 133059
negative_passages.text: How to select lenses for outdoor sports photography?
negative_passages.docid: 124074
negative_passages.text: Does stacking more lens filters decrease overall image quality?
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: 15724
negative_passages.text: Graviational Lensing Data
negative_passages.docid: 11197
negative_passages.text: How do I convert lens focal length (mm) to x-times optical zoom?
negative_passages.docid: 95539
negative_passages.text: Do lenses affect color fidelity?
negative_passages.docid: 24382
negative_passages.text: What is the depth-of-field preview button on my DSLR supposed to show me?
negative_passages.docid: 57844
negative_passages.text: What lens focal length most closely resembles the perspective of the human eye?
negative_passages.docid: 15644
negative_passages.text: What is crop factor and how does it relate to focal length?
negative_passages.docid: 21523
negative_passages.text: How can aperture be f/11 on a lens with an aperture range designation of 3.5-5.6?
negative_passages.docid: 116068
negative_passages.text: How to determine exact contrast ratio