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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2
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2answers
23k views

Why an I getting Err 01 with my Canon camera and lens?

So I just got a Canon Rebel T4i and I'm having trouble with my lens (18-135mm STM lens). It's when I have my camera on movie mode, when I'm setting my aperture the blades won't change. I can only set ...
6
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2answers
962 views

Do apodization screw-on filters or alternatives exist?

Recently I saw an article about the new sony lens with apodization element. This element should basically be a piece of glass with a circular graduated filter, placed close to the diaphragm. ...
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4answers
587 views

Where is the aperture?

Where and how is the aperture placed inside a lens? How come the image is not affected (no obscuring) by something inside the lens literally blocking light?
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1answer
802 views

F-stop and behaviour of aperture with change in focal length in a zoom lens [duplicate]

I have two related questions regarding behavior of aperture area/diameter with respect to various focal length in a zoom lens, like, Canon EF-S 18-135mm f/3.5-5.6 (with variable aperture and variable ...
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1answer
982 views

Dust visible on pictures with small aperture

A few months ago I took my then new camera (Nikon D7200) out with a tripod to take some small aperture shots. I noticed a significant amount of artifacts on the resulting pictures. A quick Google ...
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1answer
3k views

Does the diameter of the aperture increase with increases in the focal length with constant F-number(F-stops)? [duplicate]

What I have learned from the definition of F-number is that; The F-number (sometimes also called focal ratio, f-ratio, f-stop, or relative aperture) of a lens is the ratio of its focal length divided ...
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2answers
2k views

Does Zooming the lens Changes the Aperture? [duplicate]

Hello Photographic Lovers, Aperture is what the power of lens to open and close so as to control the light. So When we Zoom in the lens and see the far objects, then it changes the aperture. So ...
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2answers
667 views

Is wide aperture required when shooting faraway objects in low light conditions?

Assuming the following: the subject being shot is lit rather poorly no flash because the subject is far away the subject being shot doesn't move the camera is on tripod and doesn't shake no other ...
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1answer
563 views

Zoom, Aperture size and focal length [duplicate]

I am very new to photography and have been working my way through a few books and magazines trying to learn how to use my camera more effectively. I keep getting stuck on the differences between the ...
1
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1answer
614 views

I can't get the aperture to stay at f/4 and shutter speed at 1/1000 in manual mode on a sony a6000

When I set the aperture and shutter speed on my a6000 in manual mode the aperture always changes when I take the photo. I am using a sony 24-240mm lens f/3.5-6.3. It does the same in aperture mode. ...
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4answers
11k views

How to focus on long distance with object in front and blur the object?

Recently, I saw a blog post by Julia Trotti and I wonder how to achieve the same effect with Fujifilm X100T. The effect can be seen in this photo. The landscape is in focus while object is blurry. ...
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2answers
2k views

Will my camera autofocus over the full range of a telephoto lens with variable aperture?

I'm looking to get a Sigma 150-500mm f/5-6.3 for my Nikon D3300. I've been trying to wrap my head around the crop factor and how that works and how it affects auto focus. Spec sheet for my D3300 say ...
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3answers
460 views

What's the intended use of lens with f-numbers close to or "faster" than f/1?

Lens with f/1.2 are rather expensive and not very widespread. Lens with f/0.95, f/0.85, f/0.8 do exist but they are also very expensive and quite rare. Lens with f/0.7 are so rare that some of them ...
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3answers
928 views

How to get someone razor-sharp from head to toe from a distance of 12 feet (3-4 meter)?

I have tried several apertures, but I still can't get the entire body of the subject to be super-sharp. When the subject extends the arms, I find the hands to be less sharp than the eyes. I'm using a ...
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5answers
905 views

Maximizing bokeh in the foreground?

Another question asks, How can I maximize the “blurry background, sharp subject” (bokeh) effect? Rather than the background, I am interested in blurring the foreground. What techniques or advice are ...
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3answers
738 views

Dark photos at apertures of f6 or f8

I am trying to test for a photoshoot of a model on white background and most of my images are coming out very dark unless I increase my aperture to the maximum. I am using a fixed 50mm lens, shutter ...
2
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1answer
180 views

Which Konica AR to NEX E-mount adapters support manual (mechanical) aperture control?

I have a Tokina 28mm f/2.8 lens which uses a Konica AR mount. I am trying to adapt it to fit on an E-mount body. However, the lens has a manual mechanical aperture control (circled in yellow). Are ...
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1answer
112 views

Example of desired look: how do I duplicate it? [closed]

A few questions: In the attached picture if you zoom in, there is a very slight blur on this mans freckles. It is still in focus, but it almost looks as if the picture was painted. How was that ...
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2answers
674 views

How do I adjust aperture on my Nikon F-mount lenses when I adapt them to a Canon EOS body?

So I bought a Nikon F mount to Canon EOS adapter so I can use Nikon lenses on my Canon body. Unfortunately my Nikon lenses are stuck at their smallest aperture while on the Canon body and the camera ...
1
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2answers
3k views

Large Sensor vs Large Aperture [closed]

Both increasing the sensor size and increasing the aperture size (in terms of f-stop) increases low light performance and decreases depth of field. Given, say, an equivalent of a full frame and f/1.8 ...
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4answers
19k views

What does 1:4-5.6 mean on a lens?

what does 1:4-5.6 means on the lens. Does it means that the focal length is from f4 to f5.6 only? Or does it means that it has a range from f1 to f5.6?
0
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1answer
168 views

Canon 24-105mm aperture diaphragm screw size

I need to mount a Canon 24-105mm aperture diaphragm unit to something, but I don't have any screws for it. In the lens itself, it is attached to some sort of mount via 3 screws that screw into the ...
0
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1answer
799 views

Verifying the integrity of your library

After reorganizing my image collection I moved a bunch of photos between different hard drives. While copying, I did get error messages. Fortunately, I had made multiple copies before doing the ...
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1answer
242 views

Does a high aperture impact exposure differently than a high shutter-speed? [duplicate]

Context: I am trying to shoot images that bear a black background /low-key. So I'm trying to understand this subject better. Edit: I would like to emphasize that this question is being asked with a ...
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2answers
732 views

How do XMP files encode aperture?

When I open a Lightroom XMP file, I read this odd line (the photo has been taken at f/8.0, all tools agree with that) exif:ApertureValue="6/1" Apparently, 6/1 means f/8.0, but where is this ...
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4answers
3k views

Why is the background bigger and blurrier in one of these images?

On my EM-10 Mk2, I'm testing a Panasonic 25mm f1.8 (top image) against the 20mm f1.7 (bottom image). I tried to make the lamp take up the same space in the frame before focusing, yet the background ...
8
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4answers
1k views

What motivated lens makers to now use 1/3 f-stops rather than say 1/4 or 1/2 stops?

I've noticed that many older lens have just hard f-stops for lens (2, 2.8, etc). However, since the aperture wheel for some is continuous you can "stop" are some arbitrary point and shoot. From my ...
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2answers
240 views

No more F/1.2 primes?

A question from my dad: “Back in my day, all the cool kids used f/1.2 primes. Is there a reason why they don't make those any more?” If I had to guess, I'd take a stab that digital sensors don't ...
3
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1answer
426 views

Limits of camera lens capabilities [closed]

I read that the canon 35mm f/2 IS is the lowest aperture lens that also has IS. Is this because a stabilizer at any lower F-stop is not possible, or just because it is just currently outside of our ...
10
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2answers
6k views

Does aperture affect field of view?

I have some conceptual difficulties with understanding field of view and aperture. Let us say, I have a wide-angle lens, for example 20mm. Field of view directly correlates to the focal length of my ...
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3answers
2k views

Canon 70-200 f/4 L still sharp at wide open?

It recently came to my attention that lenses rarely perform at it's best when wide open. Is this the case with the Canon 70-200 f/4 L? Will I lose IQ by shooting at f/4 or should I shoot at 7.1 to be ...
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3answers
2k views

Which formula for f-numbers is correct: f/D or 1/(2NA)?

I've seen two different definitions for the f-number of a general-purpose lens. Are they consistent ? I'm assuming that subjects are distant (not macro, magnification is small), and we have a lens ...
6
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3answers
853 views

Does the maximum aperture vary linearly with focal length?

Many lenses list a range of maximum apertures. For example, the Nikon kit lens has a maximum aperture of f/3.5 at 18mm, but at 55mm it's only f/5.6. Does that mean that at half-way between 18mm and ...
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2answers
833 views

The command dial on my my Nikon 5100 suddenly stopped working — what can I do?

It was working fine. Just suddenly can't adjust the aperture or the f stop using the adjustment wheel while in M or A mode. In fact, the adjustment wheel doesn't work for any purpose. Basically the ...
0
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1answer
294 views

Nikon F - Lens with Built-in Autofocus Motor and Manual Aperture Ring

My question is as follows, is there such thing as a nikon-f mount lens that has a built in autofocus motor and a manual aperture ring? Or do the two contradict each other? The camera model is Nikon ...
2
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1answer
6k views

Can I control the aperture of a F-mount lens with aperture ring from the camera body?

If I buy a lens with a manual aperture ring like the Nikon AF 50mm f/1.8D, then does that mean that I can only control the aperture on the lens? Or can the camera control it too? I want one with ...
3
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4answers
995 views

Why does illuminance stay the same for a given f-stop even when focal length changes?

I'm trying to wrap my head around the math/physics of how illuminance on the film/sensor plane remains equal for a given f-number regardless of the focal length of the lens. Since a longer lens will ...
1
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2answers
535 views

How can I cancel aperture resetting between subsequent image shots of a timelapse?

When shooting timelapses, small deviations of aperture position between shots can cause an image to flicker. The most obvious way is buy a lens that doesn't reset aperture on every shot you take. What ...
4
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1answer
3k views

How do I set the aperture of a Nikon lens when using extension tubes?

I bought extension tubes to do some macro photography. The problem I am facing is that the tubes I got disconnect the aperture from the camera settings. So, I thought I will fix the aperture, ...
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5answers
2k views

Does shooting landscape at lower f-stop produce reasonably sharp images?

This article argues that, 50mm prime lenses, on the other hand, have a maximum aperture of somewhere between f1.2 and f2, letting you hand hold photos in much lower light levels (they also give ...
2
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1answer
126 views

Concert photography settings

Hello all I've just upgraded my Canon 500 D to a 750 D. With that I purchased a Tamron 16-300 mm lens all-around use for daytime trips when I go out in the wheelchair is I am a quadriplegic and it was ...
3
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3answers
909 views

How can I experimentally determine the size of my lens’s aperture?

I have a Canon FD 28mm f/2.8 that I shoot on my entry-level Canon DSLR using an adapter. You have to set the aperture manually, but only every second aperture is marked: between ƒ/2.8 and ƒ/4, for ...
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2answers
7k views

Why can't I change my Nikon D3200 aperture in Live View? [duplicate]

I removed the lens to show to the shutter release. While putting the lens back on I didn't place it correctly on the first attempt. Also, when I removed the lens, the camera was on and possibly in ...
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2answers
680 views

Does a teleconverter lose one stop of light from both ends of a variable aperture zoom?

If I add a Canon 1.4x III extender to my new EF 100-400mm f/4.5-5.6L lens, I believe I lose one stop of light. So what happens to the f/4.5-5.6 part? Does the f/5.6 part become f/8, for example, at ...
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2answers
3k views

Aperture, Canon Eos 1200D, Am a beginner [duplicate]

If we change aperture..does it affect on lighting conditions? Or only shutter speed affects light..?
-2
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2answers
1k views

Unable to change aperture setting on dial, so consequently reading poor light [closed]

Nikon d3200 (aperture scale unable to change)
2
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1answer
855 views

How does a manual lens know when to adjust the aperture?

When I look through a viewfinder before I take the photo, the lens is "wide open" - at its largest possible aperture (unless the depth of field preview is used). The aperture is adjusted to whatever I ...
2
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3answers
322 views

From a user perspective, is a stopped down variable aperture zoom lens equivalent to a constant aperture zoom lens?

Let's say that I have a 24-70 F3.5-4.8 variable aperture zoom lens. If I were to stop down that lens to 4.8, would it then be equivalent to a 24-70 F4.8 constant aperture zoom lens from a user ...
5
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8answers
3k views

How to take a tunnel photo with a model inside the tunnel?

I recently bought Nikon D7200. A good camera. But I feel a great challenge while taking a photo of a model standing in the middle of the tunnel. The tunnel is short and outside the tunnel is a ...
0
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2answers
192 views

Does focal length affect coordinate estimation?

I am using a webcam mounted on the ceiling to track some markers. I measured the area on the ground that the webcam is able to see, it is roughly 2.61m x 1.46m. The output of the coordinates right in ...

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