Before the rush

Before the rush
by evan-pak

Submit your Photo
Hall of Fame

Please participate in Meta
and help us grow.

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.

learn more… | top users | synonyms

1
vote
2answers
101 views

Why can't I change my Nikon D3200 aperture in Live View? [duplicate]

I removed the lens to show to the shutter release. While putting the lens back on I didn't place it correctly on the first attempt. Also, when I removed the lens, the camera was on and possibly in ...
0
votes
2answers
52 views

Does a teleconverter lose one stop of light from both ends of a variable aperture zoom?

If I add a Canon 1.4x III extender to my new EF 100-400mm f/4.5-5.6L lens, I believe I lose one stop of light. So what happens to the f/4.5-5.6 part? Does the f/5.6 part become f/8, for example, at ...
0
votes
2answers
31 views

Aperture, Canon Eos 1200D, Am a beginner [duplicate]

If we change aperture..does it affect on lighting conditions? Or only shutter speed affects light..?
18
votes
6answers
4k 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
votes
2answers
73 views

Does focal length affect coordinate estimation?

I am using a webcam mounted on the ceiling to track some markers. I measured the area on the ground that the webcam is able to see, it is roughly 2.61m x 1.46m. The output of the coordinates right in ...
2
votes
2answers
88 views

How does a manual lens know when to adjust the aperture?

When I look through a viewfinder before I take the photo, the lens is "wide open" - at its largest possible aperture (unless the depth of field preview is used). The aperture is adjusted to whatever I ...
1
vote
3answers
166 views

From a user perspective, is a stopped down variable aperture zoom lens equivalent to a constant aperture zoom lens?

Let's say that I have a 24-70 F3.5-4.8 variable aperture zoom lens. If I were to stop down that lens to 4.8, would it then be equivalent to a 24-70 F4.8 constant aperture zoom lens from a user ...
0
votes
3answers
731 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 ...
5
votes
8answers
2k views

How to take a tunnel photo with a model inside the tunnel?

I recently bought Nikon D7200. A good camera. But I feel a great challenge while taking a photo of a model standing in the middle of the tunnel. The tunnel is short and outside the tunnel is a ...
2
votes
1answer
112 views

Why do zooms have small apertures even around 50mm?

A 50mm f/1.8 prime from one of the major manufacturers can easily be found for $200 or less, but zooms that include 50mm in their range always seem to have much smaller apertures even at 50mm until ...
0
votes
2answers
96 views

How do I correctly convert from aperture diameter into f-stops?

I'd like to know whether it's possible to convert the radius of the focal point into f-stops properly. The following equation illustrates that the diameter is dependent on the f-stop: aperture ...
23
votes
7answers
6k views

Why don't compact digital cameras have the aperture range of DSLRs?

Why is it that on compact digital cameras the aperture never seems to go any smaller than about F8 ? Even on high-end compacts such as the Canon G10 or Panasonic LX5. Is there some practical or ...
-6
votes
1answer
61 views

Widest f1.8 canon full frame lens?

What is the widest lens offered for canon (by any manufacturer) that has an aperture of 1.8 or lower?
1
vote
7answers
2k 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 ...
0
votes
1answer
157 views

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

Your article "What apertures are required to enable autofocus, including cross-type or high-precision focusing, on Canon DSLR cameras?" is most useful. Would the new Canon autofocus technology, in the ...
6
votes
1answer
10k views

Why does my aperture setting change as I zoom on my DSLR kit lens?

I am new to the photography field, there are few things which I am not able to understand. I am playing around with my Nikon D90 along with its kit lens (18-105mm). While reading about Depth of ...
11
votes
1answer
1k views

Does focal length affect diffraction, in addition to aperture?

The reason I ask is that f/18 on a 24mm lens = 1.5mm, and f/18 on a 180mm lens = 10mm. I thought diffraction is due to the small physical size of the aperture, rather than the f-ratio, yet I only ever ...
1
vote
2answers
596 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
1answer
2k views

Does maximum aperture change with focus distance with the Canon 60mm f/2.8 macro lens?

This site says The Canon EF-S 60mm f/2.8 Macro USM Lens loses 1/2 stop at 1:5, 1 stop at 1:3, 1.5 stops at 1:1.5 and 2 stops at 1:1 (lifesize). Can anyone confirm that at 1:5 magnification, ...
1
vote
3answers
111 views

tokina at-x pro 100mm f/2.8 macro for Nikon - aperture automatically changes while in manual mode

The max aperture on my Tokina 100mm at-x pro is f/2.8 but when I focus on anything closer than around 9 feet, the aperture automatically starts to close down and get progressively smaller (higher f-...
1
vote
2answers
77 views

When stopped down, does light still pass through all of a glass element behind the aperture blades

When you stop down and look through the lens, the iris (circle of light) gets smaller. Does this mean that light only passes through the middle of each lens element behind the aperture blades? What ...
-1
votes
5answers
314 views

Which equipment and settings were used for this kiteboarding photo?

My question is how was this picture taken. And I've got a few assumptions I made regarding the photo, please correct me when I am wrong. Quite open aperture, like 1.4-2.0 Quite high shutter speed, ...
0
votes
4answers
99 views

Aperture iris in front of lenses (in object space)

This question discusses the iris placed in camera body and this question does not reveal too much details about external iris. I recall from scattered information that I have read that iris placed in ...
19
votes
7answers
4k views

Can a smaller sensor's “crop factor” be used to calculate the exact increase in depth of field?

If APS-C and similar crop-sensor digital cameras have a focal length multiplying effect such that a 50mm lens has an apparent focal length closer to the field of view of an 80mm on a full frame camera,...
2
votes
1answer
120 views

Why do DPReview's charts show the G7X II as having an aperture around f/8?

I have a Canon G7X II camera, which has a 24-100mm f/1.8-2.8 lens. Why does DPReview's chart show it having an aperture of around f/8 at a focal length of 100mm?
1
vote
3answers
246 views

Why did Pentax change to open-aperture metering when this causes the need to stop-down for old lenses?

On my Pentax ME Super with a legacy lens (Pentax SMC 50mm 1.7) my camera meters at all aperture ring settings. Yet, if I transfer this lens to a modern Pentax DSLR, I need to stop down the lens to ...
1
vote
6answers
4k views

What are the pros and cons of constant-aperture zoom lenses, for a relative beginner?

I use a Sony NEX-5R, and I bought the Sony 18-105 F4 constant-aperture lens. I'm aware that the constant-aperture F4 gathers more light than, say a F3.5 - 5.6, and it gives you more control over the ...
0
votes
1answer
67 views

Can you adjust Aperture in [Tv] mode on a PowerShot G7 X?

I do not own a PowerShot G7 X, but my friend does. We want to know if it is possible to adjust the aperture when in [Tv] mode, so that she can try for milky water on a waterfall. Is this possible?
0
votes
0answers
51 views

Why do I get the “Press Shutter Release Button Again” error when my D3200 isn't set to max. aperture?

I know there are quite a few posts out there about the famous "Press Shutter Release Button Again" error. But mine seems to be quite weird. I own a Nikon D3200 with the standard 18-55 mm lens. It ...
0
votes
1answer
67 views

How can I maximizing dynamic range without postprocessing?

How can I maximize the amount of detail captured in both dark and light objects in the same photo? I don't have the option of post-processing, so "traditional" HDR is not possible. If I reduce ...
4
votes
2answers
4k views

Why doesn't the background become blurred when I change the aperture on my Fujifilm S4000?

I am sorry if my question is too naive, but I am a complete beginner in photography, and I think I still need to understand well what aperture is. I have a Fujifilm S4000 camera, and I know I can't do ...
57
votes
4answers
85k views

What does f-stop mean?

What does f-stop mean? Is it the same thing when people say "2 stops" for example?
1
vote
1answer
88 views

Finding the real settings of my camera

I installed the CHDK firmware on my camera. One of the options it has is to show the "true" ISO that any given displayed ISO represents (eg. display ISO 80 is really ISO 45). This got me wondering: ...
0
votes
3answers
93 views

What all techniques and best practices I should use or improve for these photos? [closed]

I am beginner in photography. These two photos are taken in manual mode and I feel it's perfect shot. Please have a look and let me what all things I should improve and what I shouldn't consider. ...
1
vote
2answers
503 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
2answers
123 views

zoom or aperture which one decreases DoF?

When I want to decrease my DoF and have Bokeh in my photos, I always stuck between choosing either opening the aperture or zooming. Should I start zooming or should I decrease the aperture? Edit: I'...
0
votes
2answers
169 views

Does F number stay the same between 35mm and Medium Format?

Rented a medium format camera to see "what is this medium format look" everyone talks about! and evaluate if it is awesome enough to start saving money for it or not. So my own camera is a Nikon D-...
19
votes
5answers
2k views

What are the practical advantages of fast lenses when shooting landscapes?

I'm still using my 18-105 kit lens on my Nikon D5300, and the (lower) quality of the photo on edges is bothering me, so I want to get some lens that produces good quality through the whole photo. ...
4
votes
11answers
1k views

Why would a serious photographer buy a lens slower than f/2.8?

It seems to me that the general idea is that, once you start getting to become a decent photographer and are really moving beyond your kit lenses, you shouldn't be looking at anything slower then f/2....
0
votes
1answer
295 views

Why can't I set the aperture on my Nikon D7200?

I have just recently bought the Nikon D7200 and am having trouble using aperture priority mode. I have been doing exactly what the manual says - I switch the mode to A but when I turn the dial on the ...
3
votes
1answer
139 views

Scrum photo technique

I remember seeing some photos taken of children which had been staged by getting the kids to form a rugby scrum - all in a circle with arms around each others shoulder and leaning in to look at the ...
0
votes
3answers
195 views

Which smartphone camera would give better low-light picture results?

Just interested in choosing the right smartphone for lowlight photography I have following contenders. Option 1 has 16 MP, Aperture f/1.8, OIS, with sensor size 1/2.6" and 1.12 μm pixel size Option ...
43
votes
4answers
25k 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
4answers
246 views

Why doesn't the f-stop on my D7100 change when I hold +/- and change the dial in manual mode?

On my Nikon D7100, the f/stop will not go down from 14 when I hold down the +/- button and turn dial. All I get is a little number below but the photos do not change exposure when I change this number....
2
votes
2answers
2k views

Will a faster lens, like f/1.4, help get better Milky Way images?

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 ...
-3
votes
2answers
234 views

Reverse Engineer this processing in lightroom

Wondering if anyone can put a quick eye on these photos below and share what develop edits in Adobe Lightroom they think could help create a similar style in other photos. These were taken by ...
1
vote
2answers
153 views

Why my dslr takes more time to process pictures shot at high apertures?

Using the same setting, my 600d takes about 10 secs from flash to preview picture if I shoot with a high aperture of f/22. But if I shoot with the same settings at f/3.5, I can see the picture preview ...
9
votes
2answers
1k views

Landscapes: why *narrow* aperture?

In an earlier question, several people suggested that for landscape photography, you want a small aperture, “to maximise the depth of field”. I'm not sure I understand that… Surely if you're ...
3
votes
2answers
565 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 ...