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.

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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 ...
Natalie's user avatar
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-...
Marcus's user avatar
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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'...
Marcus's user avatar
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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)?
étale-cohomology's user avatar
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2 answers
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Relation between half angle of numerical aperture and angle of view

The numerical aperture is defined as NA = n sin(θ) Where θ is the half-angle. For a lens consisting of multiple elements, is there any relationship between θ and the angle of view of the lens? Can ...
Amarth Gûl's user avatar
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2 answers
147 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. ...
Hannah Hornberger's user avatar
1 vote
2 answers
143 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 ...
Topcode's user avatar
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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. ...
Jishan's user avatar
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3 answers
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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 ...
E2R0NS's user avatar
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4 votes
1 answer
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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#...
reox's user avatar
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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 ...
calpyte's user avatar
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3 answers
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Why are larger apertures used for astrophotography? [duplicate]

Learning about aperture, and depth of field. I have understood it as such ...
user's user avatar
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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 ...
spikey_richie's user avatar
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3 answers
631 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 ...
annah's user avatar
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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 ...
Gabor B's user avatar
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-4 votes
2 answers
100 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 ...
Hamza's user avatar
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1 vote
4 answers
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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 ...
Esra's user avatar
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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 * ...
zworek's user avatar
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1 answer
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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 ...
Carson's user avatar
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1 vote
3 answers
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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, ...
jsf80238's user avatar
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2 votes
2 answers
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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 ...
Mark Robin's user avatar
0 votes
2 answers
291 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 ...
Marcus's user avatar
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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 ...
M.Ionut's user avatar
2 votes
6 answers
221 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 ...
LilBro's user avatar
  • 197
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 ...
Bastian's user avatar
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2 votes
4 answers
155 views

Should I use rounded or exact f-stop values for a depth of field calculator?

I'm designing a DOF calculator. Looking at other calculators, I can see that some of them use rounded values (e.g. f/2.8) and some use exact values derived from the square root calculation (e.g. f/2....
zakray's user avatar
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1 vote
5 answers
956 views

What is the relation between aperture number and exposure, keeping all other parameters fixed?

My language is German, so forgive my lack in English words, especially with regard to photography. I tried to understand at a very basic level the relation between aperture number and exposure and ...
MichaelW's user avatar
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5 answers
205 views

Why is my aperture mode taking forever to take a photo of the moon?

I tried to take a photo of the moon, I was in Aperture mode but it was like a self timer was on. It took ages, it took that long, I had to turn off the actual camera and of course, it took as soon as ...
Photography Tom's user avatar
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1 answer
343 views

Aperture setting on the camera vs. the lens

I have a Canon 80D and have a question about the aperture setting on the camera vs. the lens. I know about aperture, and my understanding is it's similar to how your eye works in letting in more or ...
John Livermore's user avatar
0 votes
2 answers
141 views

how to find best FX camera to avoid diffraction at small apertures

Long time Nikon user. Looking to capture highest resolution images at smallest apertures possible in order to obtain most depth of field. Have read various scientific writing about diffraction and ...
Martha Smudger's user avatar
0 votes
2 answers
983 views

There are many f2.8 zooms for FF. Why are there so few f2/f1.8 zooms for APS-C?

APS-C/Super35 cameras are less staple for film than they were before, but are still widely used. Besides, there are quite a few semi-professional APS-C DSLRs on the market. As far as I understand, a ...
Dwarf Vader's user avatar
2 votes
9 answers
755 views

Is deep depth of field AND bright exposure possible?

I know that a larger aperture corresponds to a brighter exposure and shallower depth of field for a given focal length. Is it optically possible for a custom-built camera to form an image with both a ...
Ben Hershey's user avatar
0 votes
0 answers
46 views

Why does an iPhone need software for Portrait Mode? [duplicate]

I have an iPhone X, with a camera specs of: Wide-angle: ƒ/1.8 aperture Telephoto: ƒ/2.4 aperture Why does the phone need software to produce Portrait Mode image (image with background blur / bokeh)? ...
runandrew's user avatar
1 vote
1 answer
152 views

New but old Canon 20 - 35mm f3.5 - 4.5 will no longer stop down to f 3.5

Need some info/help please. I have a 6dmk2. I bought a brand New/Old Canon 20 - 35mm f3.5 - 4.5 Love this lens, inexpensive, light and exactly what for my needs. PROBLEM: it will no longer stop down ...
Fred Parczewski's user avatar
2 votes
3 answers
230 views

focal length to aperture relation while zooming - is my russian lens lying to me?

I have this old soviet/russian "Granit" 80-200mm lens, connected to my Canon 550d DSLR through M42 adapter. I also have "modern" kit 18-55mm lens. What I don't get is how aperture ...
kao3991's user avatar
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1 vote
1 answer
55 views

How do you know how much of an effect on the image will be when using a strangely shaped aperture like star-shaped or heart shaped?

Compared to regular pentagonal aperture, what effect does the image have if you use the aperture of the shape below? The above aperture has a pentagonal shape and has a protruding part to the side. ...
EEJJONG's user avatar
  • 11
0 votes
3 answers
2k views

Using FF lens on APS-C changes lens aperture value?

Someone told me that hen using Full frame lens on APS-C camera (1.5x crop factor) in addition to multiplying focal length by crop factor (e.g. 35mm * 1.5 = 52mm actual focal length on APS-C) you also ...
LilBro's user avatar
  • 197
5 votes
4 answers
2k views

What causes images to have flat depth?

I am learning about photography and I remember reading about an effect that causes images to look like there is no depth but now I cannot find what it is called or what causes it. I remember an ...
dandov's user avatar
  • 51
2 votes
2 answers
365 views

Why does my lens aperture stop working a few hours after attaching the lens?

I recently purchased a used Sigma 105mm f2.8 DG OS Macro lens, and when I tested it during the purchase everything worked fine. A few hours later when I tried it again, I noticed that my pictures were ...
Cris's user avatar
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0 votes
1 answer
276 views

Any modern camera that has a visual aperture indicator?

On the back of the Nikon D3200 seen in the picture we can see a graphical representation of the selected aperture. Are any modern cameras able to show that in some mode?
lijat's user avatar
  • 1,591
0 votes
4 answers
3k views

Can aperture be changed in aperture mode even with a constant maximum aperture lens?

I am new to non-auto mode. If I have a fixed aperture lens with f/2.8 16–35 mm. Does this mean I cannot change the aperture to f/4 or f/5 on my camera because the lens only supports f/2.8? Is the f/2....
starphoto's user avatar
4 votes
2 answers
618 views

Is using a low F-number (wide aperture) for landscape photography a good practice?

I recently asked a question (How to increase the quality of photos taken through a DSLR?) on how to increase the sharpness of my images. One of the answers proposed that even though it is known that ...
asimplecoder's user avatar
0 votes
1 answer
1k views

Why is it not possible to change Aperture in Livewiev on a Nikon D5300 when using manual movie settings?

I've been using my Nikon D5300 for about 1.5 years and have recently started to use it for some video work as well. I realized that when manual movie settings are turned on and you go to live view, ...
jng224's user avatar
  • 1,608
1 vote
2 answers
163 views

Canon 70D - shooting video interviews in bright conditions with low aperture

I'm trying to shoot an interview in the middle of the, in the outdoors - which means, it's very bright. While keeping the aperture low - to keep the interviewee's face in focus, with narrow depth of ...
golosovsky's user avatar
3 votes
1 answer
241 views

Is the noise coming from fast aperture ring adjustments of Sigma 100-400m lens on Sony A6500 expected?

I recently got a Sigma 100-400mm for my Sony A6500 and love it so far. But I noticed that the aperture ring makes noticeable noise on power ON and power OFF. See Google Photos album of two videos ...
radj's user avatar
  • 155
1 vote
1 answer
1k views

I can't change shutter speed

I recently got a Nikon D3100. But I have a problem now: I can't change shutter speed or aperture in any mode. I am stuck at 1/4 and when I try to wheel it shows me 1/3 for a second and then switches ...
Christy's user avatar
  • 11
3 votes
2 answers
754 views

What is the bokeh difference between 1/2.3" f/0.95 cell phone and 1" f/1.8 compact camera?

I am thinking of buying a Sony RX100 (mark i). The thing is, I am gonna use it for pet, flower photography, and I really like the f/0.95 lens on my cell phone camera. It produces creamy bokeh with 1/...
Someone Unknown's user avatar
2 votes
3 answers
683 views

Why 1 sunbeam for each aperture blade in your lens? [duplicate]

I don't understand the embolded phrase below. I'm unschooled at physics and photography. Starburst and Sunstar Effects Starbursts, also called sunstars, are beautiful elements that you’ll find in ...
user avatar
4 votes
4 answers
2k views

Why does high brightness affect white balance correction?

I am starting to shoot with a Nikon D5200. Today, the light is bright and diffuse because of clouds. In M mode with f at 5.6, I set the white balance preset as per the manual, and often get an error &...
miguelmorin's user avatar
1 vote
3 answers
707 views

Why do we use smaller apertures, such as f8, for landscape photography?

In photography, it seems universally agreed that you should shoot at f8 to f11—basically an aperture before light diffraction comes into play. I've been quite confused about this for a while. Let's ...
Skeleton Bow's user avatar

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