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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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 ...
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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, ...
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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 ...
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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 ...
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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 obtain should look something like ...
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2 votes
6 answers
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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 ...
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3 answers
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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 ...
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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....
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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9 answers
444 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 ...
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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)? ...
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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 ...
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3 answers
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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 ...
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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. ...
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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 ...
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4 answers
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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 ...
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2 answers
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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 ...
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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?
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Can aperture be changed in aperture mode even with a fixed aperture lens?

I am new to non auto mode. If I have a fixed aperture lens with f 2.8 16 to 35 mm. Does this mean I cannot change the aperture to f4 or f5 on my camera because the lens only supports f2.8? Is the f2.8 ...
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4 votes
2 answers
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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 ...
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1 answer
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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 aswell. I realized that when manual movie settings are turned on and you go to Liveview, you ...
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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 ...
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3 votes
1 answer
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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 ...
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1 answer
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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 ...
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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/...
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2 votes
3 answers
405 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 ...
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4 votes
4 answers
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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 &...
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1 vote
3 answers
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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 ...
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2 votes
2 answers
188 views

Would a Canon EF 800 f/5.6 with a 2x extender on a Raspberry Pi camera work? (9024mm focal length, f/90.24)

The new raspberry pi high quality camera has a sensor size of 1/2.3", with a C-mount. If I attach a C-mount to Canon EF lens adapter, then a 2x extender, then the Canon EF 800mm f/5.6 L IS USM, from ...
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5 answers
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EOS 250D the aperture changing only when picture is taken

I have yongnuo 50mm f1.8 lens In Av Mode When I m changing the fstop the diaphragm blades remains fully open and depth of field doesn't change I have looked to user Guide and find that I can assign ...
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How can I control the aperture of a Nikon G lens when using extension tubes? [duplicate]

Due to corona lockdown, I'd like to try macro photography. I have two lenses (18–55 and 35 f/1.8) and a Nikon D5300. As I currently do not have the money to buy a real macro lens, I found 3 cheaper ...
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What are high f-stops (larger than f/5.6) good for when using compact camera?

I carry the Sony RX100M3 with me and usually shoot aperture mode (generally around f/5.6 for deep dof). I notice that my camera allows for very high f-stops up to a maximum of f/11. If I calculate the ...
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3 votes
2 answers
931 views

What's the difference between aperture value and f-number?

In macOS Finder it says a photo taken at f/2.8 has an aperture value of 3. What is an aperture value, and how is it different from f-stop?
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2 votes
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How to fix diaphram of Nikon 14-24mm f/2.8 G?

Somehow one of the nine blades in the aperture of my Nikon 14-24mm f/2.8G has come fully loose and can be seen laying turned sideways when I look through the lens. I don’t want to pay to repair it, ...
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1 vote
2 answers
134 views

Optimal settings for video capture in front of large digital whiteboard

I have a youtube channel and create a lot of technical videos in front of a large Dell monitor which I use as a whiteboard. I used to use my iPhone but switched to Nikon Z50 with a shotgun microphone ...
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1 answer
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How can we calculate effective megapixel loss due to diffraction?

How can we calculate an image's effective megapixel count at each aperture setting, specifically as loss relates to diffraction? Assume that we already know the sensor size, its true megapixel count, ...
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Does aperture really matter if the subject distance is large?

I have calculated the depth of field for my Sony RX100M3. I have done so numerous times for all three parameters: focal length, subject distance and apperture. I noticed that for sufficiently large ...
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1 vote
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Time difference between Auto Mode and Other modes

I'm a super newbie to photography. I would like some clarification on the following: I am shooting an image in Auto mode. There is no shutter lag at all and the picture looks good. The settings are: ...
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Do you get more bokeh on a APSC sensor with a full frame 50mm f/1.8 lens or a APSC 30mm f/1.4?

I am trying to compose a detail shot where I want to get as much background blur as possible. I am using Sony a6500 camera (APSC 1.5x crop factor body). I am considering two lenses: Sigma 30mm f/1.4 (...
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1 vote
1 answer
486 views

Why does aperture change when I zoom my lens even in manual mode? [duplicate]

I have my Nikon D7500 set to Manual Mode. I can change the shutter speed and it maintains the setting. When I change the aperture, the setting is not maintained and varies depending on the zoom of ...
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1 vote
3 answers
424 views

Is it better to shoot at diffraction limited aperture or sharpest lens aperture?

In the old cameras like Nikon D80 with 10 Megapixel pixel count. The diffraction limited aperture is F/13 but its known that lenses are generally sharpest at the F/8 so it's a no brainer to shoot at F/...
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2 answers
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Aperture and the understanding of how it works [duplicate]

So over black friday I bought this bundle, which is the Nikon D3500 two kit lenses. I was wondering, I keep hearing people talk about aperture and using F11-F16 but on those lenses that I have, all I ...
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4 votes
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Is it best to use a wide aperture when I'm focusing at infinity and depth of field is not a concern?

If I shoot at f1.4, I can easily separate my subject from background due to the shallow DoF. In the case where I turn the focus to infinity at f1.4, I will have everything in focus, except the ...
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18 votes
5 answers
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What are the benefits of the classic f-number scheme?

Classic ƒ numbers are entrance pupil diameter as a fraction of focal length. This seems like a slightly strange choice as exposure is proportional to area rather than diameter. Naively I would think ...
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1 vote
1 answer
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Why does changing aperture change field of view in my reverse-lens macro setup?

I have a reverse lens macro setup, with a reversed 35 mm lens attached through an adapter to a 80-200 zoom lens. I have the following issue: changing the aperture setting on the zoom lens changes the ...
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2 votes
1 answer
202 views

What aperture is selected when I use a Nikon N2000 with a G lens?

I started using a Nikon N2000 and I inserted a Nikkor 50mm 1:1.8G (https://www.adorama.com/images/Large/nk5018gu.jpg) Since there is not any setting of the aperture (which may be from f1.8 to f.16), ...
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