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Questions tagged “t stop”

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

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105

How much light do vintage Petzval lenses lose to transmission?

large-format lens-transmission vintage-lenses petzval t-stop

Photography Stack Exchange contributor

6y ago

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104

Why does one lens give darker photos than another at the same settings?

nikon lenses aperture t-stop exposure

Photography Stack Exchange contributor

7y ago

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139

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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91

Does T-stop account for crop factor on APS-C or Micro Four Thirds?

cine-lenses micro-four-thirds crop-factor t-stop exposure

Photography Stack Exchange contributor

8y ago

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96

Does T-stop or focal length matter more for low-light brightness between a 14mm f/2.8 and 16mm f/2 on APS-C?

aperture low-light astrophotography aps-c t-stop

Photography Stack Exchange contributor

8y ago

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123

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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2

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134

What would the human eye’s T-stop be compared with its f-number?

aperture optics human-eye t-stop exposure

Photography Stack Exchange contributor

10y ago

0

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2

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146

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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134

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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106

How can I compare the relative light transmission of different lenses with a digital camera?

lens light-transmission t-stop raw exposure

Photography Stack Exchange contributor

11y ago

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2

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136

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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2

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127

How should I compare lens speed using T-stops instead of just f-stops?

lenses aperture low-light light-transmission t-stop

Photography Stack Exchange contributor

12y ago

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77

Why can two lenses at the same f-number produce different brightness?

f-stop lenses aperture t-stop exposure

Photography Stack Exchange contributor

13y ago

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219

How can you practically measure a lens’s T-stop or light transmission?

lens optics testing t-stop exposure

Photography Stack Exchange contributor

13y ago

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149

Do all lenses transmit the same amount of light at the same f-number?

f-stop lenses aperture t-stop exposure

Photography Stack Exchange contributor

13y ago

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343

What is a T-stop, and how does it differ from an f-stop?

f-stop video aperture t-stop exposure

Photography Stack Exchange contributor

14y ago

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98

Do premium lenses transmit more light than cheaper lenses at the same f-stop?

f-stop canon lenses aperture t-stop

Photography Stack Exchange contributor

16y ago