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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
votes
2answers
355 views

How does physical aperture size relate to f/stop?

There are two lenses on the market I am comparing AF Micro-Nikkor 60mm f/2.8D AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED If I use the formula for calculating apertures of both the lenses I will use ...
0
votes
3answers
10k views

How to change aperture in manual mode on an entry-level Nikon SLR?

In manual mode on my Nikon D3200 I cannot change just the f/stop setting. It only changes in relation to the other settings. How can I reproduce settings that I have found in books on photography if I ...
1
vote
1answer
28k views

How to change Shutter Speed and Aperture on Canon T2i?

I have a Canon T2i and I am having a hard time figuring out how to change the shutter speed and aperture. I have tried reading the manual but it seems to be a little unclear. Can someone please point ...
0
votes
0answers
29 views

How to remove oil from aperture blades?

If you go on ebay or other second hand places, you'll see a fair amount of lenses that have oil on the aperture (particularly on older lenses). I've done some reading and it looks like this oil is ...
45
votes
6answers
8k views

What is a “diffraction limit”?

I've seen the term used, but what is a "diffraction limit", when should I worry about it, and what undesirable effects are a result of it ?
7
votes
1answer
304 views

Why does the Fujifilm X30 limit shutter speed limit in aperture priority mode?

According to FujiFilm X30 specs: Shutter speed: (Auto mode) 1/4 sec. to 1/4000* sec. , (All other modes) 30 sec. to 1/4000* sec. * 1/4000sec. at small aperture, 1/1000sec. at full aperture In ...
1
vote
0answers
25 views

How does using a teleconverter affect the aperture of a lens? [duplicate]

I have hear that a teleconverter affects the apperture of a lens. But I don´t know how to calculate it. Is there a formula to calculate how much will a 1.5X or 2X teleconverter affect apperture?
1
vote
2answers
86 views

Why does my lens refocus when the f-stop is changed?

I have a prime Sigma f1.4 50mm lens on my Nikon D90 in P mode and focus mode on a set point of the field and notice that when I am using a tripod and change the f-stop that the camera changes the ...
3
votes
1answer
970 views

Why do my photos appear grainy when taken at the widest aperture?

I have a Nikon d5000 and just purchased a Tokina 11-16 lens. I was taking picture of a dog 1-2 meters away during winter at mid day today. Using the aperture priority setting, I set the camera to ISO ...
0
votes
1answer
19 views

Photos Imported into Aperture Aren't Showing Up

I imported about 500 images into Aperture (mostly CR2, but some jpg), and for some reason they're not showing up in my library. If I right click on my library and select "Show Package Contents" and ...
1
vote
2answers
199 views

Nikon D7000 and Nikkor 28 2.8 is not working together

Not long ago, my father gave me his old Nikkor 28 f/2.8D lens which seems to be in perfect shape despite being at least 15 years old. The most noticable difference is the aperture ring which non of my ...
1
vote
0answers
48 views

Why does the exif data show a max aperture 1.6 when I am using a f/1.8 lens? [duplicate]

I am looking at exif data of one of my image that i took with Nikon 35mm f/1.8 lens. While the exif information of my actual aperture is correct, max aperture displayed is 1.6 for the lens which is ...
1
vote
1answer
183 views

Why does my camera insist that my Nikon 50mm f1.8 be locked at its lowest aperture setting?

I just got this lens and I really love it, but I can't seem to figure out why it will only take pictures at f/1.8. If I attempt to change the lens aperture setting, it says the aperture must be set at ...
1
vote
1answer
202 views

Is it possible to add an aperture ring on Nikon G Lenses?

Many of the more affordable Nikon FX Lenses are G Lenses, without the aperture ring. One of my Cameras is a Nikon FG manual 35mm SLR from the 80s, which could only support a G Lens at the lowest ...
1
vote
3answers
147 views

How can I shoot with a fast aperture in sunlight?

I have Nikon D7000 with 50 mm lens and like to shoot my family with 1.8 aperture. But, in sunlight it looks so bright. I am a beginner and had try to increase the shutter speed in manual but it's ...
4
votes
1answer
392 views

Why does changing the aperture cause lag in live view and in videos?

On my Canon 70D there's a considerable lag during the change of aperture when pressing the depth of field preview button. This lag also occurs during video recording, which causes the video to halt ...
40
votes
4answers
15k views

What apertures are required to enable autofocus, including cross-type or high-precision focusing, on Canon DSLR cameras?

This is a follow-up to Why does Canon and Nikon limit or disable autofocus beyond certain f-numbers? I'm doing this to separate the AF aperture requirements from the linked question above. My goal ...
4
votes
1answer
376 views

How can I fix a Nikon DX 18-135mm with an aperture stuck open?

I am currently on a trip and I brought an 18-135mm lens and a 35mm prime as my two lenses for the trip. When I took my zoom out of my backpack off the plane and put it on my camera, I immediately ...
0
votes
1answer
72 views

Do mobile cameras ever vary f stops?

I've been trying to get my head around the camera in my newly-bought Chinese mobile phone. I wonder how focusing actually works in these kind of phones. I imagine that in the standard context of ...
0
votes
0answers
40 views

Mechanical Aperture Control Adapter for my Nikkor lenses

I have the following lenses --- AF-S NIKKOR 18-70 mm 1:3.5-4.5G ED AF-S MICRO NIKKOR 105 mm 1:2.8G And I use it for High Speed Videography mainly. Since these lenses have no mechanical aperture ...
10
votes
3answers
4k views

Why don't comparisons of aperture take sensor size into account?

When one compares focal length, many times we use the 35mm equivalent length. A 50mm lens on an APS-C sensor camera(1.6x) would be a 80mm equiv. length on a full frame camera. But when we state the ...
1
vote
2answers
109 views

How can I know how far the in focus area extends [duplicate]

I know when for example camera is on f2.8 it means an area in front and back of the place that focus is, will be in focus and areas closer or farther will be out of focus, but if it is for example ...
35
votes
8answers
42k 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?
1
vote
4answers
678 views

What causes an f/0 error on a Nikon D700?

Recently (and always at the worst possible time) my camera will either freeze and give me an f/0 error code or will shoot with a strange click that sounds like the shutter is getting stuck. The ...
0
votes
1answer
254 views

Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length?

Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length (the kit lens for my T3i)? I'm looking for a cheap lens that offers a wide ...
1
vote
3answers
1k views

Is there a way to adjust the aperture of a Nikon lens without a camera or physical aperture ring?

If I have a camera that does not have any electronic connection to the lens, is there any way to adjust the aperture on the lens if it does not have a physical aperture ring? We're using a scientific ...
4
votes
4answers
206 views

Is it possible to get smaller aperture with diaphragm in front of the lens?

My camera has narrowest aperture of f8. To increase depth of field, could I place an opaque "filter" or lens-cap with a small hole, e.g. 12 mm for f16, on the lens? I realize that at short f.l. the ...
1
vote
1answer
138 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 ...
0
votes
0answers
84 views

How does the Tamron 70-200mm F/2.8 without VR/IS compare to the Nikon 70-300mm F/4.5-5.6 VR?

I'm looking at two different lenses. The Tamron AF 70-200mm f/2.8 Di LD IF Macro Lens. ...
60
votes
12answers
27k views

Is there a noticeable difference between 1.8 and 1.4 prime lenses?

I have been shopping around for a prime lens for my Nikon D50. I noticed that the 1.8 is hundreds of dollars cheaper than the 1.4 AF-S. What will I gain for that cost difference? Is it really ...
0
votes
1answer
134 views

How are aperture changes implemented on D-series Nikkor lenses?

Nikkor G lenses have a built-in USM motor that permits auto-focusing on bodies with or without the focus motor. They also permit changing the aperture from the aperture dial on the body. Nikkor G ...
3
votes
3answers
730 views

How to fix a Nikon 100mm f/2.8 Series E lens not being properly recognized on a D300?

I have a Nikon 100mm f/2.8 Series E mounted on my D300. When I set the aperture on 2.8 on the lens, it is seen as 1.8 on the D300. At its maximum, when set at f/22 on the lens, it is seen at f/16 on ...
20
votes
3answers
3k views

Why do wide angle prime lenses have relatively small apertures?

I've noticed that many of the wide angle prime lenses (at least for Canon) have somewhat smaller apertures than their normal or telephoto counterparts. E.g. the regular Canon 24mm prime is f/2.8 while ...
6
votes
2answers
493 views

Is using a large aperture with flash uncommon?

I found How can I use wide aperture with fill flash? and How can I use flash with large apertures? while trying to find a solution for using a large aperture to get DOF with the flash setup I have. ...
19
votes
9answers
24k views

What is an easy way to remember the full stop scale?

If you were teaching someone new to photography the full stop scales, is there a better way then flat out memorizing these values? Does anyone have an easy way that they remember the scale? Would it ...
16
votes
2answers
8k views

How iPhone 5S can have such a big aperture? f/2.2?

I thought that in order to have a big aperture such as f/2.2 a big amount of light should be able to enter to the sensor and in order to do it, a big lens was needed. How is it possible that in the ...
2
votes
2answers
236 views

Which lens for a milky way photo

I have a Nikon D7000 and don't know whether my 50mm 1.4 or 17-55m 2.8 lens would be better. I was automatically going to go with the 50mm lens, but then I was reading up on how I can use a longer ...
1
vote
2answers
244 views

Can't control aperture with D800 and AF-s 80-200mm D in Manual mode [closed]

I just mounted the 80-200mm AF-S 1:2.8D on my D800, the aperture ring is set to f/22 and locked. But now when I try to change the aperture in Manual and Aperture mode in my camera it doesn't change ...
2
votes
2answers
294 views

I don't see the hole in the lens getting bigger or smaller, so is it damaged?

Just started learning photography and ordered a 35mm f1.8G ED Nikon lens. I understand it is a prime lens, and doesn't zoom in or out, but the f number there doesn't show any change from 1.8 when I ...
5
votes
5answers
655 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 ...
3
votes
1answer
69 views

How do I set the aperture on my Canon camera with an old Zuiko lens mounted with an adapter?

I recently bought an adapter to make the om-system mount of my Olympus Zuiko 50mm f/1.8 fit my Canon 60D. I experimented a bit shooting in Av, but still don't get how the setting given to the aperture ...
4
votes
2answers
121 views

What is the maximum aperture consistent with the Nikon F-mount?

In a related thread, it's been debated whether there is a hard limitation to maximum possible lens aperture; it seems there is none. However, using the example of the nikon F mount, this technical ...
8
votes
2answers
337 views

In what way does the lens mount limit the maximum possible aperture of a lens?

In many answers to questions about different aspects of really large aperture lenses it's pointed out that the lens mount sets a hard limit on the maximum possible aperture of the lenses to that ...
0
votes
2answers
187 views

Why are lens apertures usually 1.4, 1.8, 2.8, 4…? [duplicate]

Why are lens apertures usually of only certain sizes? 1.4, 1.8, 2.8 and so on. Why not 1.6, 2.5 or any other sizes?
2
votes
5answers
336 views

Does an aperture value exist, where a lens creates a brighter image than the real view?

So (without limitations of the viewfinder for example) looking through the viewfinder creates a brighter image than normal view would be. The lens would then work like a funnel(collects light from ...
0
votes
2answers
211 views

Nikon d7000 change aperture while shooting video [closed]

I have nikon d7000 and I thought until today that I can't change aperture on the fly. Here is what I found . Go to shooting menu -> movie settings -> and set manual movie settings to OFF This allows ...
3
votes
1answer
162 views

What are these green numbers on my Canonet’s aperture scale?

There are three green numbers on my Canonet QL19’s aperture scale: The numbers are 28, 20, and 14. What are those?
0
votes
1answer
154 views

Nikon Lens - Stopping down causes over exposure in Aperture Priority mode

I just got a used Nikon 300mm f/4 AF (the older, non-AF-S version), and unmounted, when set to f/4, the aperture blades are still slightly visible (you can push the aperture lever on the lens a bit to ...
0
votes
8answers
1k views

Is an aperture range of 3.5-5.6 shallow enough to provide great bokeh on a cropped sensor?

I have been primarily shooting with a Canon 18-135 f/3.5-5.6 for several years now, and I am not completely satisfied with it. The problems I have are: A bit too wide on the low end A bit too short ...
9
votes
6answers
5k 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 ...