Questions tagged [aperture]
Aperture is the opening in the diaphragm of a camera lens. For questions relating to Apple's photo management software, please use [apple-aperture] instead.
629
questions
2
votes
2
answers
67
views
Do non-constant aperture zoom lenses vary aperture when zooming, when the aperture is not set to wide-open?
I am an experienced amateur photographer and videographer using a Sony a7sII with a Sigma 28-300mm f3.5-6.3 hyperzoom lens for a music video shot. I notice that when I test the shot zooming out all ...
1
vote
5
answers
177
views
Blurry images with telephoto lens at low f-number
I have a Nikon D7200 with a Tamron AF 70-300 mm 1:4-5.6 Tele-Macro lens. When I use low f-numbers, i.e. 5.6 (lowest possible at high focal lenghts), the image becomes very blurry. See example images ...
- 21
1
vote
3
answers
110
views
In-between aperture settings on the Fuji GW690 III
I have a Fuji GW690 III medium format film camera. There is a ring on the lens where you select the shutter speed and the aperture. The lens is built-in to the camera, and is the 90MM f/3.5 version.
I ...
- 781
0
votes
4
answers
94
views
Brightness of a full frame lens mounted on aps-c vs mounting an identical native aps-c lens [duplicate]
I am a bit confused about the effect of using a full-frame lens on a aps-c camera on the brightness of the resulting image.
Lets say we have two lenses:
A full frame 50mm f2 lens
An aps-c 50mm f2 ...
2
votes
5
answers
180
views
How do I lock the aperture to a small setting so I can focus on the sun with my DSLR's viewfinder?
I have a Nikon D5600 with the Nikkor DX AF-P 70-300mm lens.
While taking practice shots of the sun to prepare for the April 8 2024 eclipse, I noticed that even while using a mylar solar filter, the ...
- 21
0
votes
1
answer
115
views
Am I overexposing my film?
I’ve just had my first colour film back (kodak gold 200) and lots of the photographs have come out washed-out, low saturation and very white! Lots were taken in sunlight which I tried to account for ...
- 1
8
votes
5
answers
2k
views
Why do people not use large f-numbers (small apertures) when shooting landscapes, when you want large depth of field?
When some people take photos of the landscape, why do they not use like a low f-stop like f/32, because wouldn't you want everyone in focus because it's a landscape?
But quite a lot of people use f-...
- 117
0
votes
5
answers
234
views
How can I get a large depth of field at night?
I am new to photography and have a question on aperture. What if I wanted to take a picture with majority of the picture in focus, but at night time, so I can't have the aperture too high, because it'...
- 117
0
votes
5
answers
136
views
Why is aperture expressed as a function of focal length and not in absolute size?
Why is aperture expressed as a function of focal length (eg. f/2, f/4), and not in absolute size, say mm (eg. 40mm)?
- 111
0
votes
2
answers
95
views
Relation between half angle of numerical aperture and angle of view
The numerical aperture is defined as
$$\mathrm{NA} = n \sin{\theta}$$
where \$\theta\$ is the half-angle of the acceptance angle of the lens.
For a lens consisting of multiple elements, is there any ...
- 539
1
vote
2
answers
259
views
Why isn't my F Stop changing on my Nikon D7200?
I can use the dial but the number never goes up or down. It stays at 0. I tried holding down the +/- while turning the front dial and it just adjusts the amount of light coming into the view finder. ...
1
vote
2
answers
255
views
Aperture not opening completely when set to completely open
I noticed that my lens when stopped down wasn’t behaving accurately
I mean this is the F7.1
and this is the f8
as you can see, its an image of a lightbulb, very bright, pretty much impossible for it ...
- 203
0
votes
2
answers
123
views
What does it mean to have a fixed lense aperture with variable camera aperture? [duplicate]
I recently ordered the Nikon Z 24-120mm f4S and one of the features every reviewer sort of mentioned is its fixed f4 aperture. ...
- 113
1
vote
3
answers
382
views
Best settings for photographing 200 paintings indoors with floodlights and a tripod
I want to photograph about 200 acrylic paintings done by a family member who now has dementia. It's meant to be a tribute in the form of a self-published book. She had painted as a hobby her entire ...
- 113
4
votes
1
answer
625
views
Why is the standard f-number system not consistently rounded?
The standard f-numbering system can be calculated by the square root of powers of two. Commonly used today is the 1/3 system, as it can be found here: https://en.wikipedia.org/wiki/F-number#...
- 217
0
votes
2
answers
218
views
Why is my lens sharpness much softer at f/1.2 than higher apertures when taking landscape pictures?
I recently bought a used Canon 50mm f/1.2 L USM and have been noticing that the lens is quite soft at f/1.2 (using a Canon 1DX Mark II, if relevant). Now it's the first time I am shooting at such ...
- 113
1
vote
3
answers
340
views
Why are larger apertures used for astrophotography? [duplicate]
Learning about aperture, and depth of field.
I have understood it as such
...
- 155
9
votes
4
answers
2k
views
Under what circumstances does f/22 cause diffraction?
Today I went out to get a photo of a historic building with a lake in front and opted to shoot at f/22 with a tripod. To my surprise, the images aren't sharp. I also used the Olympus high res mode and ...
- 528
0
votes
3
answers
976
views
Taking pictures of moving objects in low light indoor settings without shake. Canon Rebel T7
I'm sort of new to photography and have been successful taking great photos during the day with good light. But anytime that I am indoors/outdoors with low light I can't seem to keep the image in my ...
- 1
1
vote
0
answers
280
views
Why won’t the aperture adjust on my Sony A camera? [closed]
I recently bought a telezoom objective without built-in AF. I did not bother because my camera has an AF which could handle the focus on such lenses.
I always had used lenses with built-in AF so I did ...
- 11
-4
votes
2
answers
106
views
What is the major difference between aperture and shutter?
There is some thing which I get from google is: Aperture controls sharpness and focus of photo and also how much light enter in camera. Shutter is how much time shutter open and get light into light ...
- 3
1
vote
4
answers
896
views
My aperture won’t go any narrower than f/8.0
I am using a Nikon Coolpix p900 with optical zoom lens of 24–2000. I am going to shoot fireworks so I was trying to set up before hand. My settings are on manual, ISO 200 and 1/30, but my aperture ...
- 11
12
votes
2
answers
4k
views
How did this note "19/65 21/90 22/130" help previous owner of this old Zenit 12XP film camera?
Camera info
The camera in question is an old Zenit 12XP. It belonged to my passed-away father-in-law.
It has shutter speed regulations: B, 30-X, 60, 125, 250, 500
"ГОСТ/ASA" (ISO): 16 * 32 * ...
- 143
0
votes
1
answer
1k
views
Canon AE-1 Aperture Lever in camera sticking
The lens I have confirmed to work on my back other A-1 but for some reason this camera body isn’t allowing the aperture diaphragm to fully close. It’s working from f1.4 to f5.6 but anything more it ...
- 1
1
vote
3
answers
231
views
How to maximize depth-of-field with a tripod
I'm shooting with a Sony A7C and a 35mm f/2.11 ZA Lens. Suppose it's the middle of a Summer day at high altitude. I'm using the Intelligent Auto setting, the camera identifies the scene as landscape, ...
- 145
2
votes
2
answers
265
views
Tamron SP 500mm mirror lens changing aperture and DOF
Please help me understand. I have the above F8 mirror lens. I know the difference between F stop and T stop. I have measured this T stop experimentally it is higher than F8. The DOF feels very narrow ...
- 89
0
votes
2
answers
312
views
Canon M50 showing aperture f22 using Sigma 18-300mm f3.5-6.3 [duplicate]
EDIT: not sure how to delete my post but I just realized the numbers represent the minimum f number, so this makes sense!
I recently purchased both a Canon M50 and Sigma 18-300m f3.6-6.3
I understood ...
- 1
0
votes
0
answers
87
views
Is it possible to calculate field of view and aperture given focal length, k1 and k2?
I have some data coming from an API that looks like this:
"camera_parameters": [0.785028, 0.032519, -0.053622]
and the data structure that I would like to ...
- 1
2
votes
6
answers
227
views
Why smaller AoV APS-C has same aperture as larger AoV FF lens?
I am quite confused,
FF focal length 50mm f/2.0 has aperture diameter 25mm
APS-C lens 50mm f/2.0 has aperture diameter 25mm
Then both lenses have same size front glass.
However Angle of View for lens ...
- 207
5
votes
3
answers
1k
views
Is aperture the same on different format of lenses?
I have just acquired a large format lens (a Schneider-Kreuznach Angulon 1:6,8/90) for the first time, coming from 35mm and medium format, and I am a bit puzzled by its aperture.
I want to make sure I ...
- 153
Hot Network Questions
- Can Black Lotus alone enable the Turn 1 Channel-Fireball combo?
- 8x8 grid with no unmarked L-pentomino
- Chip identification, SOP-4, "HPTD"
- What is this rectangular SMD part with a stripe along one of the long edges?
- Does there exist a Dehn filling of an irreducible 3-manifold with toroidal boundaries which is still irreducible?
- Should I apologise to a professor after a gift authorship attempt, which they refused?
- Was I wrongfully denied boarding for a flight where the airliner lands to a gate that doesn't directly connect to the international part the airport?
- Definability of acyclic graphs
- Is a "single" cpu safer than multiple cores?
- Which "other travel websites" does Booking.com fetch reviews from?
- Coping with consequences of a dog bite before buying a puppy
- Rolling median of all K-length ranges
- Is ElGamal homomorphic encryption using additive groups works only for Discrete Log ElGamal? What about EC ElGamal?
- Is it possible to understand in simple terms what a Symplectic Structure is?
- Is the variance of the mean of a set of possibly dependent random variables less than the average of their respective variances?
- Would moving the equator to the Tropic of Cancer increase Earth's arable land?
- What can cause a fire to go out besides rain?
- Real-life problems involving solving triangles
- Recommend an essay, article, entry, author, or branch of philosophy that addresses the futility of arguing for or against free will
- Why there is two different answers for the volume of a frustrum?
- Substitute HS Experiment for Synthesis/Decomposition of HgO
- Why bother with planetary battlefields?
- What Does Feynman Mean When He Says Amplitude and Probabilities?
- These two Qatar flights with slightly different times and different flight number must actually be the same flight, right?