Questions tagged “f stop”

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

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348

How do you measure the true f-number of a lens when the aperture is behind lens elements?

f-stop leaf-shutter lenses aperture optics

Peter M

1mo ago

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188

Are f-stops equivalent between large format and 35mm lenses?

large-format f-stop aperture lens-basics exposure

Photography Stack Exchange contributor

4y ago

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139

Should a depth of field calculator use rounded f-stops or exact values like f/2.828?

f-stop depth-of-field aperture dof-calculator optics

Photography Stack Exchange contributor

4y ago

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answers

231

Do T-stops include vignetting, and how do they relate to f-stops as you stop down?

f-stop lens-transmission vignetting cinema-lenses t-stop

Photography Stack Exchange contributor

7y ago

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185

Why does a lower f-number mean a larger aperture?

f-stop lenses aperture basics exposure

Photography Stack Exchange contributor

8y ago

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151

Do I need to change exposure when I zoom to a different focal length?

f-stop aperture zoom-lenses focal-length exposure

Photography Stack Exchange contributor

8y ago

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183

Why do 1/3-stop aperture values look uneven, like f/8, f/9, f/10, f/11, f/13, f/14, f/16, f/18?

f-stop theory aperture basics exposure

Photography Stack Exchange contributor

8y ago

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218

Why doesn’t a zoom lens get darker as you zoom in?

f-stop aperture telephoto zoom-lenses exposure

Photography Stack Exchange contributor

8y ago

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131

Why does the background look brighter after changing lenses at the same f/2.8 in studio?

f-stop lenses background studio-lighting exposure

Photography Stack Exchange contributor

8y ago

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285

Why does a smaller aperture increase depth of field?

f-stop depth-of-field aperture optics

Photography Stack Exchange contributor

8y ago

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180

Will an f-stop Ajna or Loka fit a 15-inch MacBook Pro, and which ICU size works for camera gear plus travel items?

nikon camera-bags f-stop backpacks travel-photography

Photography Stack Exchange contributor

9y ago

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241

What’s the practical difference between f-stops and T-stops in video, and why can movie sets look bright at seemingly small apertures?

f-stop depth-of-field video t-stop exposure

Photography Stack Exchange contributor

9y ago

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339

Why are maximum apertures like f/1.4, f/2.8, and f/4 so common in lenses?

f-stop lens-design lenses aperture exposure

Photography Stack Exchange contributor

9y ago

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186

What does the small subscript number next to the f-stop mean on a Sekonic L-478D?

light-meter f-stop sekonic spot-meter exposure

Photography Stack Exchange contributor

9y ago

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236

How does maximum aperture change across a variable-aperture zoom lens?

nikon f-stop lenses aperture zoom-lenses

Photography Stack Exchange contributor

10y ago

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249

Why are cinema lenses rated in T-stops while DSLR lenses use f-stops?

f-stop lenses aperture cinema-lenses t-stop

Photography Stack Exchange contributor

10y ago

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220

Why isn’t an f/1.4 lens brighter than an f/1.8 lens when both are set to f/1.8?

f-stop lenses aperture t-stop exposure

Photography Stack Exchange contributor

11y ago

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245

How low can a lens T-stop go, and how does it relate to very fast f-stops?

f-stop lenses optics cinema-lenses t-stop

Photography Stack Exchange contributor

11y ago

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187

Why do 60mm and 105mm f/2.8 lenses have the same f-stop if their aperture diameters differ?

f-stop lenses aperture optics exposure

Photography Stack Exchange contributor

11y ago

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317

How does a teleconverter change a lens’s maximum aperture?

f-stop lenses aperture teleconverter exposure

Photography Stack Exchange contributor

11y ago

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