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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
0answers
108 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
1answer
62 views

what is the barriers of making fast lenses? [duplicate]

I know there are lenses like f/0.7 However as a beginner I'm wondering what's the barrier of making ultra fast lenses like f/0.01 ? Also if lens manufacturers willing to make wide aperture lenses, ...
0
votes
1answer
176 views

Which of my lenses to choose for shooting the Milky Way? 17mm 2.8 or 10mm 4.5?

Next week I hope to get a good chance to do my first Milky Way shoot. Last thing I struggle with is which of my lenses to use. I want to avoid startrails. In the final round are: Sigma 17-50 2.8 ...
0
votes
1answer
80 views

Where can I find tables of common shutter speed and aperture values? [duplicate]

I'm working on image processing software (mind that I'm a programmer and when talking about photography, I'm "tabula almost rasa"). In this software, I'm using a RAW decoder that returns a data ...
5
votes
6answers
701 views

Difference between short/long exposure for faraway objects?

Say I want to take a landscape-type photograph of some large object in the distant (focus at infinity); for instance a mountain range at the horizon, or even the moon. Suppose no closer objects appear ...
2
votes
0answers
74 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
4answers
96 views

What is the limiting factor of picture resolution?

What is the limiting factor? E.g (thought experiment) If we are 200m away from a tree (let's pretend it's perfectly stationary) and we take an exposure for a week, shouldn't we collect enough photons ...
2
votes
1answer
83 views

How to find numerical aperture of lens

I need to find the precise collection cone angle of an arbitrary objective at an arbitrary (but known and finite) object-side focal length. This is typically given as the "numerical aperture", defined ...
0
votes
1answer
38 views

How to view a thumbnail for each lightroom folder in a catalog?

I'm trying to convert from Aperture to Lightroom. The first thing that does not make sense to me is how do you get an overview of your entire library (called catalog in lightroom)? In aperture, this ...
1
vote
1answer
108 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 ...
0
votes
0answers
71 views

Aperture? Have i got this wrong? [duplicate]

At the widest aperture the depth of field was shallow. So the object was clear, sharp and the background was blurry. And the shutter speed was shorter. The larger the aperture, the smaller the area in ...
3
votes
4answers
161 views

Are the aperture, ISO and shutter speed stops perfectly interchangeable? [duplicate]

Imagine you have an scene with shutter speed 1/60, f/8 and ISO 200. Then you change the configuration to get an equivalent exposure: speed 1/120, f/5.6, ISO 200 (plus one stop in speed, minus one stop ...
0
votes
2answers
97 views

How does a camera in an automatic mode choose what exposure, aperture and ISO to use? [duplicate]

For example: Does the camera detect if the scene contains fast-moving objects and if so use a shorter shutter speed? Does it detect if the entire scene is beyond the hyperfocal distance, and there's ...
-1
votes
2answers
215 views

Why doesn't an f/1.8 lens result in a lower ISO than an f/2.8 lens?

When I bought my Sony NEX-5R, I had a choice of an f/1.8 or an f/2.8 lens (both are prime, normal lenses). I was told the 1.8 will work better for low-light photography since it will let in lot more ...
1
vote
1answer
77 views

Is there a way to quickly take two photos at different apertures?

I would sometimes like to take two shots quickly, at different apertures, such as f/2.8 and f/4, but with the same exposure value (EV). Is there a way to do this with the Sony NEX-5R? In some ...
0
votes
3answers
271 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
106 views

How can I set the aperture manually when using an old teleconverter on my Nikon D80?

I have a Nikon D80, and I use it with the Tamron 70-300 and an old 2x teleconverter. When I mount both of them on my camera in Manual mode, I can change the shutter speed but I can't set the aperture. ...
1
vote
1answer
115 views

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

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 ...
0
votes
1answer
149 views

What is the smallest f number possible? [duplicate]

I've quite a few questions in this regard: Is there a theoretical limit? What has been achieved till date? What is commercially available today? If there is a sudden exponential increase in price ...
1
vote
1answer
95 views

Can I make custom bokeh shape using a 18-55mm Nikkor lens?

Custom bokeh shapes need a large aperture. The max aperture my lens can reach is f3.5. Is it big enough for a custom bokeh? I tried but it doesn't work.
1
vote
1answer
134 views

How do analog photography light meters work?

I have a Canon AE-1 film camera. It works well and I've several FD, FL and Vivitar lenses. For recent digital cameras, I know how the light meter works. However, with this old camera, I would shed ...
1
vote
2answers
273 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 ...
0
votes
1answer
82 views

Aperture and field of view - percepted by eye vs camera

I very well informed and I know about how aperture works and why is it not restricting field of view, but I somehow cannot get around the following: Aperture doesn't restrict field of view for the ...
0
votes
2answers
67 views

The aperture size of my camera ( Fujifilm Sx1) is minimun of f11 can i use a filter or something to get images similar to f16 or f22

The aperture size of my camera ( Fujifilm Sx1) is minimum of f 11 can i use a filter or something to get images similar to f16 or f22
0
votes
1answer
109 views

Night photo with Leica 25mm: blur at f/1.4 [duplicate]

I have an Olympus OMD EM5 and a Leica 25mm which takes wonderful pictures in daylight. I was trying to take night pictures with this setup and I had the following results (after several tries and ...
1
vote
2answers
156 views

How does Rokinon 24mm f/1.4 image quality compare between f/1.4 and stopped-down to f/4?

I have a Rokinon 14mm f/2.8 lens that I use as my go to for dark sky imaging with my full frame camera and it is amazing. However, I just bought a Rokinon 24mm f/1.4 lens for my crop sensor camera so ...
2
votes
3answers
150 views

What do the specifications mean on the Canon G15's lens?

I am quite new to photography, but spent some days understanding aperture, timing, zoom and ISO. Now I see the values printed on the Canon Powershot G15´s lenses, and I can´t interpret them. I ...
6
votes
4answers
639 views

Is f/number more relevant than aperture and/or shutter speed?

I've seen on Flickr that the photographers specify values for four settings about their photos (where exif data is available) - Shutter speed F number ISO Focal Length An example can be found ...
0
votes
3answers
99 views

Canon Film SLR 28-80 mm lens with sunfilter; what should be my aperture settings and distance

With the Canon Film SLR 28-80 mm lens with sunfilter (I think it has zero impact on focal length) what should be my aperture settings, if I have to take pictures of people in crowd and restaurant to ...
0
votes
0answers
41 views

Connection between aperture and depth of field? [duplicate]

I want to know what's the relationship between aperture and depth of field. Why depth changes as aperture is changed?
1
vote
1answer
86 views

Nikon P7800: Why is that different apertures result in different shortest shutter speeds?

While testing my new Nikon P7800 i came across the fact, that it cannot shoot at 1/4000 s through its entire aperture range, which is f2 - f8 @ 24mm (full frame equivalent). At f2 i can only go down ...
2
votes
1answer
195 views

What is the largest aperture on a commercially available lens? [duplicate]

Out of pure curiosity, what is the largest aperture, or lowest f-stop, a commercially available lens has. I have seen the 50mm prime lens from canon with 1.2, but not lower than that. What are the ...
3
votes
2answers
104 views

What will be my aperture with a 2× teleconverter? [duplicate]

I have a Canon 60D (crop factor 1.6x) and an 85mm f1.8 prime lens. Now I want to add a 2x teleconverter and attach the 85mm lens to it. My question is: What will the effective aperture be?
4
votes
3answers
414 views

Why do landscape photos with large apertures have dark corners?

I'm currently reading Bryan Peterson's Understanding Exposure and wanted to test his suggestion that f/11 or larger for landscapes can produce sharper photos. Perhaps not the best test but I took a ...
3
votes
2answers
184 views

How to compare the speed of lenses taking transmission into account?

When comparing the speed of two lenses, you almost exclusively hear about the maximum aperture. This of course makes sense, since at a certain lighting condition, a larger aperture in general allows a ...
9
votes
2answers
469 views

When using an Extender, does it actually change the Aperture of the lens?

I just bought a Canon 2X Extender and I always believed that It would only result in 2 Stops loss of light and not change the aperture. When I tested this extender on a Canon 135mm F/2 lens, the ...
0
votes
0answers
82 views

What is the basic relationship between aperture and focal length? [duplicate]

How does a photograph vary with a decrease or increase in aperture as well as focal length?
4
votes
1answer
200 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 ...
1
vote
3answers
143 views

Wide angle with low F stop number (eg.F2.8) in relate to depth of field

What is the purpose of having a wide angle lens like the Nikon AF-S 14-24mm f/2.8G ED with a low f/stop? For example I am shooting a landscape mountain scenery shots or group photos, why would I use ...
2
votes
2answers
220 views

What does the aperture range in a lens name mean?

Regarding lens descriptions, what does the relationship between aperture range f/3.5-6.3 and focal length range 18-270mm mean? How does this work?
0
votes
3answers
159 views

Night photography settings

I have watched a few YouTube videos now and one guy states that you should have a smaller aperture but to compensate for the lack of light coming through, you should set the shutter speed higher, ...
2
votes
2answers
65 views

I have a Fujifilm HS25 EXR and its minimun aperture is F2.8. Is there a way of getting a lower aperture for my camera?

I have a Fujifilm HS25 EXR and its minimum aperture is F2.8, but I want it to be F1.8 (my dream is to achieve the bokeh effect) Is there a way of getting a lower aperture for my camera; maybe a lens ...
0
votes
3answers
191 views

Why does the live view switch off for a long time and my photo is of low quality when I take a picture in low light?

I have Nikon D3200. I am trying to take picture in A mode. I have set Aperture f/3 and ISO to 200. I am taking a picture in very low light. The problem I am facing is that when I press the shutter ...
4
votes
1answer
303 views

What are some good examples of using ND filter with wide apertures?

Usually pictures shot with ND filters look like this one. The typical recommendation is to combine ND filter with narrow aperture to get slower shutter speed. This results in a very big depth of ...
2
votes
3answers
670 views

What does “maximum aperture” mean in a camera spec? Where can I get the full aperture range?

I own a Canon S95, and am considering getting a newer model (e.g. Canon S110 or S120), and I'm comparing the specs. According to DPReview.com, the S95 has a maximum aperture of F2.0-F4.9, and the S110 ...
0
votes
1answer
166 views

How to know the F-Stop in a Webcam? [closed]

I'm looking for a Webcam with large aperture and shallow depth of field, similar to the F 1.8 Canon lenses, so far It has been really difficult since most of the specifications for any webcam are ...
2
votes
6answers
435 views

Why are fixed-aperture lenses not more popular?

Lenses come in different varieties: zoom and prime, different focal lengths, different zoom ranges, with and without optical stabilization, and so forth. Why don't we have fixed-aperture lenses for ...
0
votes
6answers
233 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 ...
3
votes
1answer
150 views

How to calculate the optimal pinhole size?

As far as I've understood, optimal diameter for pinhole size is calculated by formula where d - the optimal diameter for pinhole c - constant f - focal length (distance between pinhole and ...
-3
votes
1answer
102 views

How to use 75-300mm lens [closed]

I have 75-300mm lens but I don't know how to set the aperture,ISO,,shutter speed Can I get better shots with this lens Can I get some tips to use this lens