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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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9
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3answers
3k views

How do I manually set the aperture and shutter speed, while auto selecting ISO with the Nikon D90?

I have a Nikon D90 and would like to set the aperture to f/1.4 and the shutter speed to around 1/60, all while having the camera compute what ISO is required for the current light conditions. I am ...
8
votes
5answers
4k 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 ...
15
votes
8answers
905 views

Would a prime be redundant with a fast zoom?

Now that I am finally getting a fast zoom (Tamron 17-50mm 2.8) I've been considering a fast prime to go with it, specifically a Sigma 50mm 1.4. Despite its shortcomings, it still does really nice ...
12
votes
4answers
747 views

Is there a noticable difference in sharpness between a 1.8 lens and a 2.8 of similar design?

I recently bought a second-hand Carl Zeiss Jena PANCOLAR MC 1.8/50mm Lens off eBay (still waiting for it to arrive though) and am going to mount it to my Canon 7D via a M42 adaptor. I primarily shoot ...
5
votes
4answers
947 views

DIY pinhole lens' aperture is ƒ00, which can't be changed and pictures turn out mostly black

I just made a pinhole lens for my Canon EOS 1000D (Rebel XS), but now I have no idea what to do next. The bulb-mode is on and ISO is 400. Camera says the aperture is ƒ00, which I can't change. What ...
19
votes
3answers
1k views

Do smaller apertures provide more depth of field past the diffraction limit, even if peak sharpness suffers?

In Understanding Exposure (3rd edition, on page 48), Bryan Peterson has what might be called a rant against modern on-line conventional wisdom about diffraction limits. Answers on this web site are ...
5
votes
4answers
11k views

What shutter speed to use when shooting video?

My camera is Canon 60D and I will be using it to shoot a short parkour video, that means: a lot of motion, moving subjects, moving camera focal length usually from 24 mm to 75 mm, but there will ...
6
votes
2answers
1k views

How to control “starbursts” around light sources?

How can you control the size of "starbursts" from light sources in photographs? For example, the lights on the shore in this photo have very sharp and long starbusts: ...
1
vote
1answer
192 views

Photography concepts using SX20

I've bought a Powershot sx20 half a year ago and I'm quite happy with it although I know it doesn't compare to a DSLR. I've learning photography on my own: bought a 58mm ring and some filters (cpl, ...
17
votes
6answers
2k 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 ...
16
votes
5answers
2k 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 ...
1
vote
2answers
641 views

What is the quantitative relation between f/# of the lens (aperture), exposure, and ISO?

Let's say we shoot with a DSLR camera and we have two interchangeable lenses. Lens #1 has aperture f/X, X between 1 and 2 (see below). Lens #2 is f/4.5. Same focal length and other characteristics as ...
13
votes
5answers
3k views

What is the meaning of “stopped down”?

Was reading this answer (emphasis mine): It also tells us that the lens was stopped down, as if it were wide open there would be no corners to cause diffraction, regardless of the number of ...
20
votes
4answers
4k views

Why do compact digital cameras not 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 Cannon G10 or Panasonic LX5. Is there some practical or ...
19
votes
4answers
9k views

Why is the aperture ring removed from new Nikon lenses?

Maybe I'm wrong, but I notice that Nikon's newer lenses don't have an aperture ring. For example, an older AF 35 mm f/2D is now replaced by AF-S DX 35 mm f/1.8G, or AF 50 mm f/1.8D is replaced by a ...
0
votes
2answers
388 views

True or False: A two full F/stop change to either side of the starting F/stop will either double or half the amount of light from the original F/stop

Explain. A two full F/stop change to either side of the starting F/stop will either double or half the amount of light from the original F/stop.
7
votes
0answers
249 views

depth of field varies with distance?

I am wondering if there is a difference in the depth of field if I stand near the subject or far from it with the same aperture (like f1.4) ? Thanks for responses
4
votes
2answers
3k views

What are the best settings for black and white film portrait photography?

trying to do some "daily shots" thing, and I was wondering what's the best setting for black and white portraits in areas that are well-lit and sometimes not (fastfoods, restaurants, malls) I want to ...
6
votes
4answers
697 views

Is depth of field and bokeh influenced by distance to the subject?

I know that the aperture size has a direct effect on the depth of field. However, what about distance to the subject? Let's say I took two pictures, one at 24mm and one at 70mm, using the same lens ...
4
votes
6answers
308 views

Recommendation for low-priced faster fixed-focal-length lens for Nikon D50

I'm looking for a lens for portraits and closeups (leaves, branches, icicles) that would be fast enough to get a blurred background. Any suggestions? I'd like to get something for $200 or less. ...
7
votes
7answers
17k views

Why is my Nikon 50mm f/1.8 giving me an fEE error?

I have a AF Nikkor 50mm f/1.8. When I have the aperture setting on the lens to 22 I can take photos. But when I change the dial to anything other than 22(lowest f/stop) then I get a flashing fEE ...
44
votes
7answers
6k 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 ?
5
votes
1answer
1k views

Why Must I Lock The Aperture On My AF Lens On My Nikon D40

I am using the Nikon 50mm f1.8 AF lens on my D40 and the photographs look excellent - I have to manual focus, but this suits me just fine for the portrait shots I'm taking. The problem is that to use ...
14
votes
3answers
1k views

Do the same camera settings lead to the same exposure across different sensor sizes?

Let's say I have a micro-4/3rd camera and a full frame camera, both set to 1/60 at f/2.8, taking a picture of the same scene in the same lighting. Will the exposure be the same across both cameras ...
8
votes
5answers
2k views

How do different aperture and shutter settings affect a photo with the same overall exposure?

Ok, here's my doubt. Suppose I want to get a certain exposure for an image. Keeping the ISO constant, there are two tentative possibilities here: Put the camera at f 1.4 (say) and at 1/1600 shutter ...
31
votes
5answers
5k views

How do constant aperture lenses work?

Cheaper zoom lenses usually are faster at the wide end and slower at the long end (for example, the $150 Canon EF-S 18-55mm f/3.5-5.6). More expensive constant-aperture zoom lenses have the same ...
9
votes
8answers
5k views

What is the fastest lens available for a DSLR?

I've seen references to f1.2 lenses. I was wondering, are there any faster lenses available for a DSLR mount?
19
votes
9answers
2k views

What's the benefit of a tiny aperture?

In this answer to another question Rob Clement wrote: Think background first. What story do you want to tell? Epic background, big mountains. Looking to deliver a sense of grandeur with your ...
6
votes
6answers
4k views

What aperture should I use to photograph people and why?

What f/# do you use to photograph people, and why? I know this varies from shot to shot. Let's suppose that you are photographing either a single person or a couple, that it it outside on a somewhat ...
12
votes
8answers
3k views

Will using a lens at max aperture (“wide open”) result in poor images?

I’m looking to add a second lens to my kit lens I got with my Nikon d7000. I have read several reviews on both the 35 and 50 mm lenses made by Nikon in particular that said using either lens at the ...
26
votes
7answers
5k views

When to use shutter priority instead of aperture priority?

Under what circumstances would you use aperture priority vs. shutter priority and vice-versa? I typically don’t use shutter priority (ever) and favor aperture priority to try to get a max aperture ...
4
votes
2answers
302 views

Is “slow” focusing/shutter release normal on a “fast” lens?

I just received a 35mm prime lens for Christmas (Nikkor 35mm f/1.8) and it is painfully slow to take pictures at times. Sometimes the shutter release is almost instantaneous, like with my other (kit ...
-5
votes
5answers
4k views

How can I get bokeh with an aperture of 3.5 as my max?

I am trying to get DOF portraits of my daughter with my Nikon d7000, as per my previous post. I have zoomed in to 100mm or so and tried to get a large aperture but as I zoom, the camera decreases f# ...
14
votes
3answers
3k views

Does a bigger aperture create better photos?

I have observed that the wider the aperture, the more expensive the lenses are. However, I would like to know whether it really makes a difference in your photos or not?
18
votes
4answers
3k views

Why is the depth-of-field preview in the optical viewfinder of my Canon 500D inaccurate?

I have noticed that in my Canon 500D, the depth-of-field preview in the optical viewfinder is inaccurate with large aperture settings. If I press the DoF preview button, there is very little ...
10
votes
4answers
488 views

Focusing on moving target with large aperature?

I have read about difficulties getting focusing right when using a large aperature (because of depth-of-field issues). If I am using a fast prime wide open (say F1.4 or F1.8) to shoot a target in ...
5
votes
7answers
2k views

Is there any way to stop down the aperture of a Canon PowerShot SD780 IS?

I have a Canon PowerShot SD780 IS point-and-shoot which I use as my carry-around-everywhere camera when I don't want to drag my SLR about. This tiny little camera works great and takes fabulous ...
25
votes
4answers
4k views

How do you find out the “sweet spot” of a lens?

I've tried googling this, but have never found a satisfactory answer. I've heard the term "sweet spot" thrown around by some photographers to mean the f-stop of a lens which results in the highest ...
9
votes
3answers
407 views

Are fast lenses only fast when shot wide open?

Given two lenses with different max apertures but the same size image circle (say, full frame on a Nikon FX DLSR camera) and taking shots at the exact shutter speed and focal length under the same ...
28
votes
4answers
2k views

How does aperture work without “cropping” the image hitting the sensor?

I've been teaching myself the various settings in cameras and now have a much fuller understanding of how to use my camera effectively, but one thing is still bugging me. When the aperture size is ...
13
votes
6answers
567 views

Does lens speed still increase meaningfully when the physical aperture is larger than the sensor size?

This question came to me this morning, thinking about 50mm lenses. I have the Pentax 50mm f/1.7 (manual) and it's a very nice lens, but would be considered (relatively) slow on 35mm film, and many ...
11
votes
1answer
276 views

What are the limits of extension tubes?

Given lighting is not a problem, can you hit a limit where you have too much extension tubes (a very long tube) and the quality of the image will suffer? For example a diffraction limit will be hit ...
51
votes
3answers
34k views

What does f-stop mean?

What does f-stop mean? Is it the same thing when people say "2 stops" for example?
6
votes
7answers
10k views

What are some common ISO, aperture, and shutter speed settings for street photography?

I recently purchased a Panasonic GF1 with the 20mm pancake lens. It's by far the nicest camera I've ever owned and I'm really excited to learn the basics of digital photography (primarily street ...
32
votes
10answers
2k views

What are some tips for shooting in low light?

I own a Canon 450D with just the standard lens kit that comes with it (poor so won't be buy a new lens for a while) and one thing I tend to struggle with is shotting in lower light conditions, indoors ...
35
votes
8answers
30k 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?
60
votes
11answers
23k 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 ...