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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3answers
259 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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2answers
60 views

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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5answers
233 views

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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5answers
2k views

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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1answer
69 views

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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1answer
115 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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3answers
244 views

Why doesn't the aperture change on a Nikon AF 50mm ƒ/1.8D lens? [duplicate]

I am facing problem with a Nikon AF 50mm ƒ/1.8 lens which is attached to a Nikon D7100. Although I can change the aperture from the camera (in M mode) it seems that it is not changing in photos. What ...
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1answer
141 views

Canon 50mm f/1.8 lens won't go down to f/1.8

Bought a 1.8 lens. Today on manual I realised it won't go down to f/1.8, the lowest is f/2.8, but on other modes it does. The camera is a Canon 5Ds. p.s - just moved to canon so is there a setting ...
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2answers
93 views

Is diffraction limited aperture independent of lens?

I have always understood diffraction limited aperture as a property of the camera and its sensor, not of the lens. The camera has a certain sensor size and a certain megapixel count, which together ...
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3answers
125 views

How to avoid noise in Aperture Priority mode arising due to auto-ISO?

I was taking photos of birds in a cloudy day and in an area of forest where light was even low under a tree as compared to other areas. I used 70-300 mm kit lens. When trying to take photo even at 1/...
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3answers
192 views

Why does the lower f-stop in my camera makes the photo darker?

I have a nikon d5100 camera with 35mm/f 1.8 lens. I'm not sure what's going wrong with my camera but my photo with larger f-stop numbers is brighter than the photo with smaller f-stop numbers (the ISO ...
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3answers
70 views

Do aperture blades move between each shot in burst mode?

Most professional cameras have a burst mode function. Furthermore, if the camera is SLR, the optical viewfinder shows what happens between the images in the burst, but when an image is taken, there is ...
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7answers
3k views

Is there any reason to change the ISO manually?

Here's my understanding so far. When taking a photo with a digital camera, there are some tradeoffs: Aperture size: bigger aperture lets in more light, smaller aperture means less blurring in space. ...
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0answers
76 views

What are the ISO, exposure, and aperture settings for single frames from slow-motion video on the iPhone 6?

I filmed a video of myself swinging a tennis racket in slow motion and then used cv2 to make jpg's of some of the frames, ie. 8 frames from the start of the swing to follow-through evenly spaced, and ...
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2answers
433 views

Changing the camera ISO , Aperture, Shutter Speed with Android

I have a smartphone with Android 8.0. I need control over : ISO Aperture Shutter speed Could you please suggest the way to go forward? I do not know how to change any of them? I am using an ...
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3answers
154 views

Does a camera have to have a contiguous housing?

The lens group in this picture would have its own protective lens tubes like the one on a camera but one for each lens group. What would be an issue having a gap between the lens group and stray light ...
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1answer
199 views

Can a camera be a mile long?

Could parts of a camera be spaced out over a distance rather then together to work in a way a normal camera cannot? What characteristics would this camera have over a normal camera? In the picture ...
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2answers
63 views

Determine the effective aperture size by f-stop/sensor size/focal length/Size of CoC [duplicate]

Is it possible to calculate the effective aperture size by the parameters below? f-stop sensor size focal length of lens size of circle of confusion If yes, what is the equation? If no, what are ...
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1answer
60 views

Is there an online lens diffraction and maximum sharpness table?

I simply want to see an table that lists the lens diffraction limit of each camera. I have came across this well done answer with animated PNG and I realized there i also the perfect sharpness ...
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1answer
104 views

What should I do when my D3400 aperture is stuck no matter what lens I use?

I have a D3400 and recently I haven't been able to change the aperture on any of my lenses in manual mode. I have lenses with aperture rings and if I set the aperture to anything below the largest ...
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1answer
51 views

Question on f-number and exposure [duplicate]

Is there any mathematical proof to show that the exposure in a camera is independent of the focal length used, if the f-number (ratio of focal length to lens diameter) remains constant?
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2answers
69 views

Relationship between f-number and amount of light being let into the lens system [duplicate]

Why does smaller f-number imply greater aperture diameter and consequently, greater amount of light entering the lens of a camera? As evidenced from my study across a number of resources, an absolute ...
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1answer
293 views

The Sunny f/16 Rule [duplicate]

Sunny-16: for optimum exposure when shooting on a clear, sunny day outdoors (distinct shadows), set the aperture to f/16 and the shutter speed as the reciprocal of the ISO. While reading about the ...
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6answers
1k views

Does a lens with a bigger max. aperture focus faster than a lens with a smaller max. aperture?

The assertion by a well known photographer is that the Nikon 400mm f/2.8 set to an aperture of f/5.6 will let in 4 times the light compared to a Nikon 500mm f/5.6 lens set to f/5.6, keeping the ...
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3answers
168 views

No1 Pocket Kodak aperture 1 to 4, f stop equivalent?

I have a lovely little No1 Pocket Kodak from about the 1920s or 30s. It is the bottom of the range model with the "Single lens". The aperture is not marked in f-numbers, but just labelled 1, 2, 3 and ...
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2answers
237 views

Astrophotography-what wrong I am doing here?

I am beginner in photography.I clicked this photo in RAW, f3.5, ISO1000, S15", Manual focus without tripod.Lens: Nikon AF-P 18-55mm. I think it is out of focus. I varied ISO from 1000-2500. Shutter ...
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1answer
68 views

Clicking sound and flickering display when using Sony 70-200 F4

I recently purchased a Sony 70-200 F4 and have been testing it on my A7 (the very first one). I noticed that there's a clicking sound and the display (both in the LCD and EVF) flickers whenever I ...
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3answers
172 views

Why is that the wider the aperture of a lens is, the more we can see through narrow cracks and crevices?

Example I took at 85mm f/1.4 on APS-C sensor:
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4answers
3k views

Why is Nikon 1.4g better when Nikon 1.8g is sharper?

I am new to photography (just 3 to 4 months of experience) and I am looking to buy a new lens (either 35mm or 50mm, but mostly 35mm because I have already decided Sigma 85mm f/1.4 DG HSM Art Lens for ...
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2answers
137 views

What is the preferred aperture of a lens for landscape photography?

I've noticed that the wider aperture is more expensive on lenses. Two of Canon's lenses that they categorize as Landscape can be seen here. The EF 16-35mm f/2.8L III is twice the price of the EF 16-...
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1answer
256 views

Panasonic Lumix G 42.5mm F/1.2 vs Panasonic Lumix G 42.5mm f/1.7 ASPH Power O.I.S

How much of a difference these two lenses will make in photo quality and what will be the difference? I am a newbie in photo and I am looking to invest in a nice lens for 4/3 that has max features in ...
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0answers
94 views

How to get bokeh or macro on E-M10 Mark II with 14-42mm Black EZ Lens? [duplicate]

I got E-M10 Mark II with 14-42mm Black EZ Lens f3.5-5.6 EZ. Is it possible to create nice bokeh and macro pics with this set up? I tried shooting many pics (well mainly on auto), but I never got ...
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3answers
104 views

What is the possible optimal range for shutter speed, aperture, and ISO settings in product photography setting on white background?

I have an e-commerce store where I have to take product photography on a white background and I want to actually have a "standard" set-up for this. I know there is no one right answer to this because ...
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2answers
920 views

How do apertures which seem too large to physically fit work? [duplicate]

A 400mm f4.0 lens is supposed to have a maximum aperture diameter of 10cm. Looking at such a lens they don't seem big enough to fit that kind of aperture including all the mechanics for control inside ...
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2answers
258 views

What is the formula to calculate aperture (“diaphragme” in French)?

Let's say I have these data for my camera: t : Exposure time in seconds ("temps de pose" in French) C : Incident-light meter calibration constant ("constante lumière incidente" in French) S : ISO ...
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5answers
4k views

Do f-stop and exposure time perfectly cancel?

I am photographing a scene with white and black elements in it. Starting at the f/22 stop, I widen the aperture one stop and decrease the exposure time by a factor of 2, take a picture, and keep doing ...
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1answer
173 views

Why the difference between sunny f/16 rule and looney f/11 rule?

There's the sunny f/16 rule that says photographs on a sunny day should use f/16 with the exposure time set to reciprocal of the ISO sensitivity. However, there's also looney f/11 rule that says ...
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2answers
92 views

Does the T-number account for lens vignetting, or only for glass/coating transmission?

Surprsingly I could not find information on this. Many lenses have vignetting profiles available. Vignetting changes if you use a cropped sensor, or, in case of zoom lenses, can change with zoom. ...
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2answers
92 views

Aperature/f stops/lenses [duplicate]

I am interested in landscape photography and a common point I hear thrown around is that a higher aperture (f11-f22) is best for landscape photos. However, every blog, YouTube video and photography ...
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1answer
415 views

How to stop aperture indicator from flashing when in shutter priority mode with manual ISO on Sony a6000?

When shooting in Shutter mode I can't get the aperture indicator on the screen to stop flashing when I set an ISO value. I'm using a Sigma 60mm F2.8 fixed lens. I've tried taking a shot in ...
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1answer
143 views

Why can't I see changed depth of field on LCD preview on my 2000D after changing aperture?

I have a Canon EOS 2000D camera with Canon EF 50mm f/1.8 lens that can achieve shallow depth of field. If I adjust the aperture settings of the lens on the camera, I'm not seeing any change of depth ...
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1answer
71 views

Can the aperture be changed when using a tilt adapter without electronic interface?

I ordered a tilt adapter from EF (Canon EOS) to NEX (Sony e-mount). The adapter doesn't have an electronic interface is there any way to manipulate the aperture? All other adapters I use have ...
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2answers
59 views

How do constant aperture zooms produce identical exposure, even though focal length is larger? [duplicate]

My understanding is that a larger focal length corresponds to a larger working aperture diameter, since the numerator is larger. Why doesn't a larger working diameter correspond to a brighter image? ...
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1answer
105 views

I want to take a picture of an interferogram of white Light [closed]

I can see a clear interference pattern by “eyeball”. But my iPhone cannot deal with the dynamic range - yeah I know our vision system is cool. But what kind of camera mimics our vision system?
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3answers
167 views

How will a teleconverter affect the sharpness of a lens at a given aperture?

If I have a 200mm f2.8 lens and apply a 2x teleconverter the effective focal length and aperture becomes 400mm and f5.6. However, I am unsure about the effect this has on other aspects, such as image ...
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3answers
183 views

What are the technical reasons to design lenses with oddly shaped apertures?

Some lenses have oddly shaped apertures, like star or shuriken shaped. It seems to be intentional since making "normal" rounded or polygonal apertures is fairly simple (as I have observed while ...
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3answers
864 views

Is it worth upgrading one stop for wildlife photography?

I have just purchased the following lens to accompany my Nikon D500: AF-S NIKKOR 70-200mm f/4G ED VR - £1,349 (see here) However, having purchased this lens a few hours ago, it has been pointed out ...
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4answers
173 views

how can I have equivalent exposure and identical white balance while changing f stops using speedlight?

how can I have equivalent exposure and identical white balance while changing f stops using speedlight? im shooting from shoes when it comes to the moment of changing f stops from 5 to 16 in order to ...
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3answers
156 views

Can too-tight lens hoods become accidental apertures?

There is frequently the suggestion to use tighter lens hoods than specified for some lenses when they are used with smaller sensors than they are designed for. The idea is that the vignetting ...
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2answers
105 views

Are bokeh (ball) shapes a result of vignette or aperture action?

The effect of getting shaped out-of-focus highlights (bokeh balls) from both non-circular apertures inside the lens, and masks applied in front of it (where an external aperture would presumably also ...