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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6
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4answers
3k views

What are the types of aperture blades?

The Canon EF 24-105mm f/4 L USM IS lens has rounded aperture blades. What other types of aperture blades are there, and what are the advantages and disadvantages of each of them? Is the aperture ...
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1answer
514 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 ...
3
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3answers
107 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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0answers
143 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 ...
34
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8answers
27k views

Technically, why is the out of focus area blurred more when using a bigger aperture?

I'm wondering, technically, why and how does the out of focus areas blur more when using a bigger aperture. I think it'd help a lot if I presented a problem that's been driving me nuts for a long time:...
13
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3answers
546 views

How to test what aperture is actually used?

It seems odd to me that Canon EF 100-400mm f/4.5-5.6L does away with a front element of only about 63 mm, as reported by @jrista - which would be enough for only f/6.3 at 400mm, missing the spec by ...
4
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2answers
3k views

Is the size of the entrance pupil the same as the size of the effective aperture?

I understand that the entrance pupil is the image of the aperture as seen from the front of the lens. However, is the size of the entrance pupil the same as the size of the effective aperture? In ...
13
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2answers
950 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 ...
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 ...
1
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3answers
1k views

Is it possible to calculate focal length of a picture taken with a zoom lens if you know the aperture?

I need focal length (for my IA homework), but I didn't know that in real world I would only get the aperture. Ok, my camera is an Olympus X-21, and manual says: Olympus lens: 6.3 to 18.9 mm, f/3.1 ...
8
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4answers
989 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 ...
57
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9answers
143k views

What is aperture, and how does it affect my photographs?

How does aperture affect my photographs? Why should I care about the aperture with which a photo was taken?
3
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1answer
254 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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1answer
2k 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 ...
4
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2answers
127 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. ...
22
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7answers
12k views

How can aperture be f/11 on a lens with an aperture range designation of 3.5-5.6?

I made a series of outdoor shots with Nikon D5000, with the 18-55mm 1:3.5-5.6G VR kit lens. On some shots, I see in the EXIF info f/11, and in another shot, f/9. How can that be, that the f-number ...
0
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2answers
110 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
507 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
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1answer
92 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 ...
0
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2answers
61 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? ...
3
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2answers
164 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 ...
0
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3answers
448 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 ...
2
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3answers
309 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 ...
0
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6answers
685 views

Is the low-light advantage of larger sensors attributable to the sensor itself or to the larger aperture of the lenses? [closed]

Let's say I take a photo using an APS-C camera and using an FF camera, from the same position, with the same ISO and shutter speed. Let's say I use a 50mm focal length for the FF camera. To match the ...
9
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3answers
1k views

What is the technical name for a zoom lens which has a fixed maximum aperture?

What is the technical name for a lens which has the same maximum aperture throughout the entire zoom range?
2
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1answer
824 views

Why don't all zoom lenses have variable f-numbers? [duplicate]

As I understand it, the f-number is a ratio between the focal length and the aperture diameter. A zoom lens can change focal length, but shouldn't the maximum aperture be a fixed size? If so, that ...
9
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5answers
4k views

What is the benefit of a wide-aperture lens if you stop it down?

As an example, say you have two lenses: 300mm f/2.8 being used at f/8 300mm f/4 being used at f/8 My understanding is that by definition the amount of light coming through the aperture means that ...
14
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3answers
1k 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 ...
4
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2answers
3k views

Why is the Depth of Field Preview button necessary?

I've looked far and wide but i cannot find the answer for this question. I know some older cameras and lenses used to have aperture rings on them, which allowed the user to set how open or closed the ...
3
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4answers
198 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 ...
1
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2answers
528 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 ...
1
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2answers
698 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?
0
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1answer
155 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 ...
2
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5answers
2k 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 ...
5
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2answers
1k 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 ...
1
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2answers
612 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 ...
1
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3answers
474 views

Apertures required to enable autofocus on Rebel T6s/T6i in Live View?

The question "What apertures are required to enable autofocus, including cross-type or high-precision focusing, on Canon DSLR cameras?" is very useful. However, would the new Canon Hybrid CMOS AF III ...
3
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5answers
2k views

How do I find the right motion blur/depth of field trade off in sports photography?

I could be wrong but when doing sports photography I'm always thinking about the following trade off: A fast shutter speed to freeze the action. A small(er) aperture to increase DOF and thus ...
1
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1answer
775 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 ...
1
vote
1answer
133 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 ...
16
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8answers
2k views

Why isn't my variable-aperture photo more interesting?

I took a photo where I changed the aperture of the lens during the exposure. I was hoping to get a cool or unusual effect, but I didn't. Why not, and is there any really interesting effect that I ...
1
vote
1answer
11k views

Canon 24-70mm 2.8f - Optimal aperture for sharper pictures

I always have trouble getting sharper images from my 24-70 lens. I have watched numerous YouTube videos to correct this and its improved but not completely corrected. I am going on a trip and don’t ...
2
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1answer
459 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?
0
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2answers
239 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 ...
5
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4answers
8k views

Are there any lenses have smaller apertures than f/32?

While most photographers prefer fast lenses that range down to f/1.2, are there any lenses that go smaller than f/32? If there are, what is so special about those lenses that an aperture of f/32 ...
39
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2answers
8k views

Why no zoom lenses with a maximum aperture wider than f/2.8?

I can understand that a zoom lens with a maximum aperture wider than f/2.8 would be difficult and costly, but it seems like something pros would kill for. Surely it can't be more expensive (if its ...
7
votes
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. ...
2
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2answers
2k views

Nikon D7000 thinks aperture of non-cpu lens is always 16 and overexposes photos

I have a non-cpu lens with manual aperture control (I use the aperture ring to set it, and it stays that way when I shoot). My D7000 used to work fine with this lens in A mode - all images were ...
6
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7answers
21k views

Do I use the crop factor in calculating aperture size and area?

How do I calculate the aperture size and area, considering an 35mm equivalent focal length value and non-equivalent aperture f-number (in terms of exposure, no multiplication of the crop factor of the ...

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