Questions tagged “lens design”

Ask the Unique Photo creator community — gear, technique, post-processing and more.

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183

Is there a general formula for the focus distance markings on a manual-focus lens?

app-design lens-design lenses focus-distance manual-focus

Peter M

10mo ago

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106

Could a wide-angle lens plus magnifier create a telephoto image with wide-angle depth of field?

depth-of-field lens-design optics telephoto teleconverter

Flux

1y ago

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135

Does a mirrorless camera need a shorter focal length than a DSLR for the same field of view?

lens-design field-of-view dslr mirrorless focal-length

Photography Stack Exchange contributor

2y ago

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342

What is optical vignetting, and why does stopping down reduce it?

lens-design aperture bokeh vignetting optics

Photography Stack Exchange contributor

2y ago

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164

Why are telephoto lens designs usually used for long focal lengths, not short ones?

lens-design wide-angle optics telephoto focal-length

Photography Stack Exchange contributor

2y ago

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128

How should depth of field be calculated for a custom 50mm microscopy optic, and why would near DOF exceed far DOF?

depth-of-field lens-design microscopy circle-of-confusion optics

Photography Stack Exchange contributor

3y ago

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133

How do I choose an f-number when designing a camera system?

lens-design aperture f-number camera-design optics

Photography Stack Exchange contributor

3y ago

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103

What would a curved image sensor change in camera and lens design?

lens-design history sensors optics camera-technology

Photography Stack Exchange contributor

4y ago

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140

Why can a 50mm f/2 lens have the same aperture on APS-C and full frame, yet a different field of view?

lens-design field-of-view aperture full-frame aps-c

Photography Stack Exchange contributor

4y ago

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Does a shutter need to match the front lens element diameter?

large-format lens-design aperture camera-building shutter

Photography Stack Exchange contributor

5y ago

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118

Why doesn’t a zoom lens’s physical aperture opening get larger as focal length increases?

lens-design aperture f-number zoom-lens manual-lenses

Photography Stack Exchange contributor

5y ago

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Does a Sony 24-70mm f/2.8 sit closer to the sensor than a Sigma 24-70mm f/2.8 on the same camera?

sigma lens-design mirrorless sony-e-mount 24-70mm

Photography Stack Exchange contributor

6y ago

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184

What’s the difference between a long lens and a telephoto design?

lens-design optics vintage-lenses telephoto focal-length

Photography Stack Exchange contributor

6y ago

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What can you learn from a lens element diagram?

lens-design lenses repair aberrations optics

Photography Stack Exchange contributor

7y ago

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160

Why does Canon use both SWC and ASC lens coatings, and how do they differ?

ghosting lens-design canon flare lens-coatings

Photography Stack Exchange contributor

7y ago

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111

Do some constant-aperture zoom lenses mechanically adjust an internal aperture while zooming?

lens-design constant-aperture manual-focus zoom-lenses used-gear

Photography Stack Exchange contributor

7y ago

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105

Is there a theoretical minimum focal length for a given sensor size?

lens-design fisheye wide-angle sensor-size focal-length

Photography Stack Exchange contributor

7y ago

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150

Why is the Canon RF 70-200mm f/2.8 much shorter than the EF version?

telephoto-zoom rf-mount lens-design canon mirrorless

Photography Stack Exchange contributor

7y ago

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144

Why does the Industar 50-2 produce rainbow streak flare?

industar-50-2 lens-design m42 lens-flare vintage-lenses

Photography Stack Exchange contributor

7y ago

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100

Are some manual-focus lenses sold that way to avoid RoHS restrictions on optical glass?

autofocus lens-design rohs lenses manual-focus

Photography Stack Exchange contributor

7y ago

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