Questions tagged “lens design”

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

votes

answers

457

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

1y ago

votes

answers

276

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

votes

answers

249

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

votes

answers

659

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

lens-design aperture bokeh vignetting optics

Photography Stack Exchange contributor

2y ago

votes

answers

341

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

votes

answers

227

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

4y ago

votes

answers

199

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

lens-design aperture f-number camera-design optics

Photography Stack Exchange contributor

4y ago

votes

answers

232

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

votes

answers

238

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

votes

answers

168

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

votes

answers

279

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

votes

answers

214

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

votes

answers

327

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

votes

answers

189

What can you learn from a lens element diagram?

lens-design lenses repair aberrations optics

Photography Stack Exchange contributor

7y ago

votes

answers

344

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

votes

answers

186

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

votes

answers

210

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

votes

answers

293

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

votes

answers

227

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

votes

answers

167

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

Page 1 of 8