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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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90 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 ...
18
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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 ...
3
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1answer
105 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 ...
4
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2answers
73 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
78 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 ...
1
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1answer
57 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 ...
1
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1answer
53 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 ...
2
votes
1answer
69 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
53 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? ...
1
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1answer
98 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
83 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
149 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 ...
14
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3answers
771 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 ...
3
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4answers
157 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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2answers
102 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 ...
3
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2answers
89 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 ...
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2answers
177 views

Why is my Tamron 24-70 F2.8 G2 clicking when used in Live View mode?

My Tamron 24-70 F2.8 G2, used with Nikon D750, is making clicking sounds when I change the aperture in live view mode on M or A setting. Is the clicking normal?
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1answer
59 views

How is the diameter of a non-circular (effective) aperture actually measured?

An f-number is determined as the ratio of the focal length to the diameter of the entrance pupil. But the actual aperture diaphragm is usually not a perfect circle. Its shape is determined by the ...
5
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2answers
828 views

Nikon D3400 aperture

I recently ordered the Nikon AF FX Nikkor 50mm f/1.8D Lens for my Nikon D3400, but when i try to take a picture, my aperture won’t open at all. I am shooting in manual but it still won’t work. I did ...
8
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2answers
2k views

What makes the difference on partially and fully visible moon?

While I'm satisfied (despite the fringe) with shoots from a partially visible moon with a cheap 500 mm lens: 1/100 ISO 100 f/? I cannot understand why the image quality is extremely diminished when ...
2
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5answers
566 views

Why do lower f-stop numbers mean larger apertures? [duplicate]

I thought this would have been asked before but it seems not. I don't understand how f-stops are numbered. From what I read, the lower the f-stop number, the larger the aperture. That is, f/2 is ...
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2answers
167 views

Changing depth of field of Nikon D5200

I've been trying to change the depth of field on a Nikon D5200 for 2 hours and I can't seem to get it to work. I have to take photos and videos of people tomorrow (this is not my camera). The depth of ...
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1answer
226 views

How can I fix a Canon lens with sand in the aperture diaphragm?

I have a 17-85mm Canon lens which I was using at the beach the other day. A sudden hard blow of wind caused sand to be thrown on me and my camera. Afterwards, the camera would give the Error 01 code ...
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1answer
125 views

How can I keep the same shutter and aperture for a series of photos, while still letting the camera figure it out automatically?

I want to take a series of photos of a still object from changing locations. All photos should have the same aperture, shutter and color balance to avoid any differences in brightness/color in the ...
2
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1answer
130 views

What aperture control enabler will let me use a Nikkor G lens on a Nikon F3?

I have a Nikon F3 and an AF-S Nikkor 50mm 1:1.8 G Lens. What aperture control Enabler do I need?
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2answers
214 views

How to take pixel-for-pixel aligned pictures with a DSLR and iPhone 7?

The Plan So I am trying to take two pictures, one with a DSLR and one with an iPhone 7. Why an iPhone 7? That's just what I own currently I want the photos to be aligned so that they are exactly the ...
4
votes
3answers
653 views

Can I force the aperture to stay open on macro lens?

I have a sigma 180mm f/2.8 lens, which I bought because it was the largest aperture I could find that focuses around 0.5m See this question for why this was important.. Upon arrival, however, the lens ...
0
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3answers
123 views

Why does my autofocus sometimes set the aperture, after the lens was in the rain for several minutes?

I'm using a Canon EOS 60D with a Canon 40mm f/2.8 STM. I bought both used about a week ago. I've had no problems except for one: sometimes the autofocus only jumps between two apertures, and the ...
1
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1answer
204 views

Why am I able to set wider aperture than my lens technically allows? [duplicate]

I'm practicing with Sigma 28 - 300mm f/3.5 - 6.3 Macro lens. And the thing I've noticed is that at 300mm focal length my aperture can be set to as wide as f/5.6. And EXIF data confirms it: I'm ...
3
votes
1answer
733 views

Can I change the camera aperture value on my Honor 8 phone?

I am planning to do some macro photography with my Honor 8 phone, i got a macro lens to clip over the phone. the problem is, i need more depth of field and hence i need to increase the f-number, the ...
7
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2answers
186 views

Why is the aperture of this old lens showing as centered blue glare?

I just bought a old Minolta MD Zoom 35-135mm 1:3.5-4.5 lens together with two old Minolta SLRs to get into film photography. Before using actual film I adapted it to my Canon 600D (using a no-name MD-...
3
votes
3answers
312 views

Reasonable setup for ultra long exposure for this kind of photo using Nikon D750

I'm using Nikon D750, and intend to take a ultra long exposure picture such as this (by Michael Kenna). What's is the reasonable shutter speed and aperture for that? If I use shutter speed 2 hr what ...
2
votes
1answer
158 views

Are Nikon lenses with electronic aperture compatible with extension tubes with electronic contacts?

Can extension tubes with electrical contacts be used with Nikon's electronically-controlled aperture lenses, such as the Nikkor 16–80mm f/2.8–4E ED VR, when combined with a compatible camera body, ...
3
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2answers
79 views

Exposure preferences

Whenever I shoot with my Nikon D5300 in manual mode I set settings so that photos have bit more pop to them - brighter than what the camera exposure meter says the correct exposure is. For instance, ...
0
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3answers
1k views

Why doesn't the aperture change when I turn the ring on my Nikon lens?

I have a Nikon D5300, and I have a Nikon ED AF Nikkor 70-300mm 1:4-5.6 D lens. I cannot change the aperture manually in the lens — I can't take photos when I turn the ring. I want to buy a Rokinon ...
2
votes
1answer
61 views

Depth of field and aperture size [duplicate]

Why does a smaller aperture size have a high depth of field? What is the physics behind this?
18
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3answers
6k views

How can a smartphone take pictures of a landscape with everything in focus?

After the announcement of the new Samsung Galaxy S9 with the new camera that changes aperture, I caught myself wondering: if smartphones have such a wide aperture (f/2.8, f/2.2, etc), how are ...
10
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4answers
2k views

Why does wider aperture make snowflakes look bigger?

Recently I went out to shoot when it was snowing. I was playing around with different aperture sizes and exposure times. What I have noticed that the wider the aperture, the more snow I can capture ...
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votes
2answers
364 views

What should I set my aperture to when there's a lot of light outside? [duplicate]

I'm just looking for a simple reminder when it comes to aperture, such as: when there's a lot of light in the atmosphere where a photo is exposed, the aperture should be low, or something. The more ...
1
vote
2answers
2k views

Aperture won’t lower [duplicate]

I have Tamron 90mm f/2.8 Macro Lens on my Nikon D5500. I’m trying to get my aperture to go to its lowest which is 2.8, however, I can’t get it to go lower than 3.0 or 3.5 (its lowest changes often and ...
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1answer
332 views

Is a lense with an aperture larger than f/8 useful with an EOS 80 D?

I have a EOS 80D and supposedly it has a max aperture of f/8. Does this mean that my camera can't take advantage of lenses with larger aperture? E.G. This one for example: Canon EF-S 24mm Camera ...
4
votes
1answer
904 views

The right aperture for capturing stars?

I recently had the chance to photograph an astronomical event - and this was my first foray into night-sky photography. I had two lenses that I used: 85mm f/1.2 shot at f/1.2 through f/2.8 16-35mm f/...
-2
votes
3answers
274 views

Aperture formula

My camera is Fujifilm s7000 (bridge) . On the lens I can see f = 7.8mm - 46.8mm . When using the formula should we use 35mm equivalents values ? Does optical zooming change the focal length? ...
2
votes
2answers
388 views

My Tamron 100-400mm f/4.5-6.3 jumps to f/6.7 beyond 360mm

I got a brand new lens today: a Tamron 100-400mm F/4.5-6.3 Di VC USD. I have mounted it on my Nikon D80. This lens seems to have a problem with its aperture: At 100mm, I can operate from f/4.5 ...
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2answers
376 views

Is Sigma 150-600mm f 5-6.3 contemporary “F4-5.6” on Crop Sensor?

I bought Sigma 150-600mm f5-6.3 Contemporary DG OS HSM Lens for my Crop Sensor Canon 1300D. What I've noticed is that it gives me max aperture of f5.6 at 600MM instead of f6.3 and f4.5 at 150mm on my ...
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4answers
167 views

How to take photo of water splash without photo getting dark? [duplicate]

I just got my beginner DSLR (Nikon D3300) and tried to take a photo of a water splash. I read about aperture, ISO and shutter speed and I know if I set high shutter speed I need to set low aperture ...
0
votes
1answer
334 views

Why can't I adjust exposure on my D90 in aperture-priority mode?

I have a Nikon D90, and I usually prefer to shoot in Aperture priority mode. However, recently when I go into Aperture mode, I can adjust the aperture, but I can't adjust the exposure, and the hash ...
1
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2answers
326 views

Do modern IF Macro lenses have true constant apertures?

From my basic understanding f/stop is the ratio between the aperture size and length of the lens. A majority of macro lenses feature an extending barrel. So naturally, a fully-extended f2.8 lens, ...
5
votes
5answers
1k views

Why does the autofocus capability depend on the aperture rather than the amount of light available?

In many DSLR manuals one can read something to the effect of: Maximum Lens Aperture: f/3.2 - f/5.6 With all AF points, cross-type AF sensitive to both vertical and horizontal lines is ...
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4answers
214 views

Which aperture value determines depth of field on variable aperture lenses?

Do variable aperture values represent the way in which depth of field is rendered by a lens or only to the transmission of light (i.e the brightness)? For example, if i wish to calculate depth of ...