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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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6
votes
3answers
508 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
79 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
35 views

Make the best decision - choosing compacts [closed]

I would like to ask to take a look at this few compact cameras. goo.gl/SFS7Wn I need to buy a new camera, but i don't know which one is the best decision. All of this cameras similiar features ...
0
votes
0answers
40 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
55 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
153 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
85 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
375 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
164 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
392 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
69 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?
3
votes
0answers
108 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
99 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 ...
1
vote
2answers
182 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
138 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
39 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
116 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
224 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
252 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
79 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
382 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
200 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
92 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
96 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
0
votes
2answers
94 views

How do i select right exposure? [duplicate]

I have canon EOS 600D and also I have following lenses: 18-55mm 55-250mm 40mm f/2.8 How do I select correct exposure. what is the sequence of priory. currently I first changing the iso, ...
2
votes
2answers
98 views

How do I determine the actual calibrated specifications of a Holga?

I've decided to get back to using my Holga, and while in the past I've been happy with the the pics I have taken, I started thinking about how "accurate" the settings on the camera are. (Yes I know ...
-1
votes
1answer
67 views

What is the difference between f/6 in dx and fx lens? [closed]

What is the difference between f/6 or f/1.8 in dx and fx nikkor lens?
2
votes
2answers
71 views

How can I use control over the aperture to take better photos?

I upgraded from a point-and-shoot to a Sony NEX a few months back. I think I've made substantial progress with regards to many aspects of photography like composition, the rule of thirds, ISO, ...
4
votes
4answers
245 views

Why does the Canon G7 allow faster shutter speed settings only at slower apertures?

I have a Canon PowerShot G7 camera. In Manual mode it supports 1/2500s shutter speed at f/8.0, whereas at f/2.5 it supports only upto 1/1600. But, should it not support higher shutter speed at higher ...
3
votes
2answers
399 views

Why didn't I get bokeh with my 50mm f1.8?

Recently I took a photograph at an aperture of f/1.8, but there was very little bokeh. The shot was of a wave with a few boats in the background. Everything seems to be clear even at f/1.8. Can ...
0
votes
1answer
106 views

Nikon D70, can I use manual aperture ring without getting the FEE error?

I'm trying to use a Nikkor AF 35-105 zoom lens on a Nikon D70, and if I try to move the aperture ring from the minimum (f/22) I get the FEE error. Now, I seem to understand that it means that the ...
4
votes
4answers
396 views

Who tells my camera which apertures my lens has

When I mount one of my lenses on my camera, my camera knows which apertures the lens has. So I ask my self: Why does my camera know that for example lens XY has a max. aperture of 2.8 and a min. ...
1
vote
1answer
174 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 ...
1
vote
2answers
72 views

How does aperture/DOF affect continuous autofocus?

When the autofocus system is deciding to adjust the focus, say in a situation of the subject getting closer to or farther from the lens, does it take into consideration the current depth of field, ...
4
votes
5answers
235 views

Should I refocus if I change the aperture in a DSLR?

The title pretty much says what I want to ask.
0
votes
2answers
139 views

how to select a proper aperture for 50mm portrait lens? [duplicate]

I am using 50 mm 1.8 potrait lens with my canon 600D. But when i take a portrait with f1.8 on Av mode using autofocus, only subjects eyes are sharp and rest of the other face is slightly blurry. How ...
1
vote
2answers
222 views

How significant is the difference between Canon 5D and Canon 5D Mark II when using the same lens at open aperture?

Recently I've asked about the difference between two lenses on open apertures: Why do two lenses with the same F-number give different amount of light? We realized that DSLRs gain the real ISO ...
18
votes
5answers
629 views

Why do two lenses with the same F-number give different amount of light?

Why do the following two lenses provide different amount of light? In both images we have fixed focusing distance, distance to the object, ISO, shutter speed and F-number.
1
vote
2answers
219 views

Help me understand effective f-number

If I set a lens to, say, f/2 but my focus is set to its closest point, my effective f-number won't be f/2 any more but it will be higher by a factor that depends on focal length, image magnification ...
4
votes
3answers
319 views

What are the disadvantages of super-zoom cameras compared to binoculars?

Maybe it is clear from my question that I don't know much about lenses, both on binoculars and super-zoom cameras, for example I don't know how can I compare the light that enters a binocular with a ...
1
vote
1answer
218 views

Size of the entrance pupil vs size of the 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 ...
2
votes
2answers
165 views

Why does oil leak from the aperture ring of old lenses?

I'm assuming that the oil was there initially to lubricate the aperture blades, but why does it leak out?
0
votes
3answers
193 views

Can I estimate the light gathering power of a lens by measuring size of entrance pupil?

Supposing I have an unknown lens of which I don't know f/# and focal length. I want to estimate the total amount of light that my lens can collect which, I believe, is given by the solid angle that my ...
0
votes
7answers
363 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 ...
3
votes
1answer
81 views

Lens f-number and speed on adapted lenses

A lens has a focal length, and its entrance pupil has a diameter. The ratio of these is an f-number. The size of the entrance pupil is limited by the size of the front element, and we describe lenses ...
13
votes
2answers
2k 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 ...
1
vote
1answer
255 views

My Brand New Nikon 50mm f/1.8D giving problem

My lens is Nikkor 50mm f1.8D and camera is Nikon D7000. I bought the lens yesterday. (24.09.2013) In spite of setting the lens aperture locked at f22, as recommended, my Nikon D7000 camera apertures ...
1
vote
3answers
220 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 ...
1
vote
2answers
130 views

Does aperture affect a cameras vignetting?

I'm hoping I can get some better insight into how my camera works and how I can apply it in the future. I have a custom built camera with a Canon EF 200 lens mounted to it. The camera allows me to ...
0
votes
5answers
685 views

is the Nikon 35mm f/1.8 worth it after i have the kit lenses? [duplicate]

I have a Nikon DX (D5100) camera with the two most basic kit lenses: 18-55mm f/3.5-5.6 VR and 55-200mm f/4-5.6 VR. These two lenses cover lots of scenarios, but I'm starting to believe there is more ...