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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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0
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1answer
373 views

Which Low light zoom lens with image stabilization for DSLR [closed]

Recently started doing some DSLR videos for a website. For testing purposes I got a t5i with Sigma 50mm 1.4F lens. Most videos are in low-light settings. I've been using a tripod and it's worked ...
4
votes
1answer
379 views

How can the aperture value written in Exif be larger than the nominal limit of the lens?

A photo shot with an 1:1.8 lens contains the following exif data: ApertureValue: 1695994/1000000 MaxApertureValue: 16/10 How is this possible? Both values are <1.8.
2
votes
2answers
473 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 ...
1
vote
1answer
38k 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 ...
48
votes
6answers
9k 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
712 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?
3
votes
1answer
1k 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 ...
1
vote
2answers
285 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
51 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
271 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
293 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
279 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 ...
40
votes
4answers
18k 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 ...
0
votes
1answer
120 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
62 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 ...
11
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 ...
0
votes
2answers
126 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 ...
1
vote
4answers
1k 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
700 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
2k 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
236 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
256 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
134 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. ...
61
votes
12answers
32k 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
145 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
817 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
518 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. ...
18
votes
9answers
30k 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
11k 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
675 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
286 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
309 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 ...
6
votes
5answers
864 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
122 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
169 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
399 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
285 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
354 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
509 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
201 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
232 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 ...
1
vote
8answers
2k 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 ...
10
votes
6answers
6k 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 ...
33
votes
10answers
2k views

What are some tips for shooting in low light?

I own a Canon 450D with just the standard kit lens that comes with it (I don't plan buying a new lens for a while) and one thing I tend to struggle with is shooting in lower light conditions, indoors ...
5
votes
2answers
716 views

Why are large zoom ratio constant apertures lenses not generally available?

I know about 17-55 f2.8 and the likes of it, but I am talking about something say 18-135 f2.8. There exists 70-200mm f2.8 and the range (200-70 = 130mm) is much bigger than in 18-135. I am aware of ...
3
votes
1answer
219 views

Sharp, in focus portraits - analyse an example please

I have tried taking a few portraits in my living room, using studio flash. I'm still new to it, so my lighting setups may not be great. I have found sometimes that I can shoot 3 or 4 shots in a row - ...
10
votes
6answers
5k views

Will a lens with a low aperture value give me better portrait photos?

I want to take pictures of people from 5-20 feet away. I attend lots of group events and am free to walk around and snap photos. I just purchased a Canon t3i and it comes with a 18-55mm kit lens. The ...
54
votes
4answers
55k views

What does f-stop mean?

What does f-stop mean? Is it the same thing when people say "2 stops" for example?