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by Bart Arondson

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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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10
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2answers
897 views

How to stop a high F number from appearing blurry?

I have been out taking some evening photos (just after sunset) and I have noticed that in a number of instances the higher f numbers ( 14+ ) are appearing more blurred than the lower f numbers ( < ...
3
votes
1answer
217 views

RAW export in Aperture giving square “grid” pattern over noise

I have a RAW photo in aperture that has quite a lot of noise. When I export the photo to JPEG (and TIFF/PSD, 16 bit) I get a strange square grid like pattern on the photo. Here is an example of the ...
1
vote
1answer
314 views

Aperture not stopping down on Tamron lens

I have an EF-mount Tamron 70-300mm f4-5.6 lens that seems to have developed a problem. On all focal lengths from 70mm to approx. 200mm, the lens works flawlessly. When the zoom ring goes above 200mm, ...
10
votes
4answers
481 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 ...
14
votes
2answers
799 views

DSLRs with separate controls for aperture and shutter?

I just bought a Nikon D3200 DSLR and I'm going to return it. It's fine if you always want to use in fully automatic mode, but in Manual mode, it's much less convenient. You have to set the shutter ...
6
votes
6answers
2k views

How does aperture size or shutter speed affect color temperature?

With all other parameters assumed constant, does aperture size or duration of exposure have any effect on the resulting color warmth or vividness? (Even slightly.) While answering please also ...
4
votes
9answers
742 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 ...
0
votes
0answers
36 views

Solid explanation behind the physics of the relation between aperture size and depth of field [duplicate]

Possible Duplicate: Technically, why is the out of focus area blurred more when using a bigger aperture? Many of us know that there is a relationship between the aperture size (f-stop) and ...
8
votes
2answers
281 views

Why dont I see a difference in the brightness through my viewfinder when I change the aperture?

If I change the aperture for a particular photo, why don't I see a change in the brightness of the image in the viewfinder?
6
votes
6answers
1k views

Is it important that the Canon 1DX isn't specified to autofocus with lenses slower than f/5.6? [closed]

Seeking the lens market AND the related info WRT Canon 1D X, I found some things which seems concerning: 1st, a note from Canon's Chuck Westerfall (see here) saying: “AF is unavailable on the ...
11
votes
3answers
3k views

What settings should I use to photograph aurora borealis with a wide angle f/4 lens?

I've tried my first night photography of the stars last week. Most articles I've seen were recommending a fast lens, fully opened, @ ISO 800 and about 20 - 30s exposure, etc. Unfortunately, my only ...
6
votes
4answers
619 views

Does the same aperture at a shorter focal length allow for faster shutter speeds?

I was about to ask why the new Canon 24-70mm F/2.8L II doesn't have IS, but then I came across the answer to Why there is no Canon 50mm *IS* lens? and it got me thinking... (The short version of the ...
6
votes
1answer
633 views

Why does wide angle lens adapter + large aperture make images blurry?

I have a kit 18-55mm lens on my Canon. I also have a .45 wide-angle lens that I use on the kit lens. The results are fairly sharp. When I try to use the .45 wide-angle lens on the 50mm @ f/1.4, it ...
5
votes
1answer
659 views

What is the relation between shutter speed and exposure compensation in aperture priority?

I was using a manual focus lens with canon 600D and notice something in aperture priority mode. When I was applying the exposure compensation of -2EV, I had a shutter speed of 1/20 sec and when the ...
4
votes
3answers
1k views

How to make the faces clear and bright in dim light photography?

I have a Fujifilm Finepix S2980 with which I do a lot of experiments. One thing which really bothers me is taking pictures in dim light. I wish to take decent quality pictures in dim light without ...
9
votes
3answers
1k views

Small Aperture difference - A big difference?

I had a second a second thought about asking this question because I have already asked a very similar question here but then I decided to proceed and make this one as different as possible. I ...
1
vote
1answer
668 views

Why does my DSLR's viewfinder ignore the aperture ring on a legacy lens?

I have a Nikon D3100, and I am borrowing an old Nikkor 50mm SLR lens (http://www.destoutz.ch/lens_50mm_f1.8_1828564.html). I've had a lot of trouble with that lens, in that pictures that appear ...
3
votes
1answer
241 views

How is aperture handled when in live view mode?

When you are using the viewfinder, whatsoever the aperture value is, the lens will be in widest aperture until DOF-preview button pressed or half-shutter button.But what about the aperture value when ...
3
votes
3answers
742 views

How do I photograph the moon with a compact camera?

I have a point and shoot digital camera, with a 26x optical zoom and 10 mega-pixel resolution. What are the adjustments that I should do to get a nice photograph of moon in the night? What are the ...
8
votes
1answer
360 views

Why does my Zeiss Hasselblad Distagon lens have a 5 blade diaphragm?

As we are all aware, the more blades there are in a lens’s diaphragm, the rounder the resulting hole can be made, and in turn this gives a more natural looking bokeh. So on receiving my recent ...
3
votes
1answer
477 views

Can a consumer-grade camera take good aurora pictures?

It's generally hard to take clear pictures of auroras because they are fairly dim and move around. To get enough light for a good picture, you need a long exposure. But then your picture will be ...
3
votes
2answers
1k views

What would be a good indoor setup to find a lens's sharpest aperture?

I read the whole of How do you find out the "sweet spot" of a lens? — great question and answer, but it didn't discuss a potential homemade rig for finding the sharpness aperture of my ...
2
votes
1answer
163 views

How do aperture and the tilt portion of a tilt shift lens relate?

I have found that you can use the tilt feature of a tilt shift lens to do some pretty neat things with depth of field. I can throw it 8° to the right and everything on the left side of the image drops ...
-2
votes
1answer
263 views

Is there a way to create a tilt-shift photography effect without changing aperture? [duplicate]

Possible Duplicate: How to get a miniature effect on pictures without special equipment? I recently asked a question that was closed, and this question is not the same. I am still trying to ...
1
vote
2answers
875 views

Fixing F number in Manual Focus 50mm lens on a D7000

I have a 50mm f/1.2, this lens: http://www.nikonusa.com/Nikon-Products/Product/Camera-Lenses/1435/NIKKOR-50mm-f%252F1.2.html that I got used from a guy I know. When I mounted it in my D7000 though, ...
3
votes
2answers
218 views

Is there a difference in sharpness between aperture stops?

Is there a notable difference in sharpness between aperture stops of a lens? If so, where can I find that information for my Canon 550d Kit lenses?
7
votes
3answers
900 views

how the camera determines correct aperture and ISO in bulb mode?

Consider that the camera is in shutter priority and the exposure time is set to bulb mode. Now the camera doesn't know how long the shutter is going to be open in advance and so how does the camera ...
1
vote
3answers
572 views

How to calculate f-stop and ISO equivalents for a Lomography Spinner 360°?

In this review, there's this paragraph explaining f-stop and ISO equivalents: The two aperture settings are marked with the sunny and cloudy symbols which equate to f16 and f8.0 respectively ...
4
votes
2answers
2k 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 ...
9
votes
2answers
3k 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 ...
2
votes
3answers
188 views

DOF and picture quality

Is it possible to say that picture quality is better with small f number but on very small DOF, so this perfect quality degrades very quickly? So basically is there any reason to shoot with big ...
0
votes
1answer
971 views

What impact on image resolution does the aperture have?

What is the effects on depth of field, signal to noise ratio and image resolution when reducing the aperture?
10
votes
2answers
393 views

Max aperture on zoom lenses - stepwise or linear?

When zooming with lenses without a fixed max aperture, the change in aperture* that the camera displays is stepwise, usually in steps of thirds. But, is the max aperture really the same all the way as ...
16
votes
2answers
768 views

Do rounded edges on aperture blades improve image sharpness, and how?

In the description for the XF lenses for its new X-Pro system, Fujifilm crows: The [XF lenses] all offer precise control over depth-of-field and deliver excellent out-of-focus bokeh thanks to the ...
3
votes
0answers
73 views

Forgive my ignorance: Aperture changes as I zoom in why? [duplicate]

Possible Duplicate: Why do zoom lenses and compact cameras have varied maximum aperture across the zoom range? Just starting out with lacrosse pictures on my new Canon EOS 60D and zoom lens ...
20
votes
4answers
3k 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 ...
2
votes
2answers
372 views

Why are the area of aperture, focal length, and amount of light specified in these terms?

So I'm looking at the wikipedia article on Aperture, and I'm a bit confused. I understand aperture to be the diameter of the hole that lets light in. In the article, someone states that The ...
11
votes
2answers
5k views

Why does Canon and Nikon limit or disable autofocus beyond certain f-numbers?

One thing that I've noticed with Canon DSLR camera is they will disable or limit autofocus when the lens is below certain aperture values, which are specified in my answer to What are the aperture ...
16
votes
7answers
1k views

Why isn't my variable-aperture photo more interesting?

I took a photo where I changed the aperture of the lens during the exposure. I was hoping to get a cool or unusual effect, but I didn't. Why not, and is there any really interesting effect that I ...
-2
votes
1answer
889 views

How does aperture affect exposure? [duplicate]

I've heard that aperture can change the exposure, but I would like to know if this is true, and how it does it. P.S. I hope this question isn't dumb like my last two.
13
votes
3answers
328 views

How to test what aperture is actually used?

It seems odd to me that Canon EF 100-400mm f/4.5-5.6L does away with a front element of only about 63 mm, as reported by @jrista - which would be enough for only f/6.3 at 400mm, missing the spec by ...
-2
votes
1answer
475 views

How can I use aperture to make my pictures better? [duplicate]

Possible Duplicate: What is aperture, and how does it affect my photographs? I've recently started trying to change the aperture level on my camera to get cool effects, and I would like to ...
5
votes
4answers
357 views

How can I take hi-speed photos of water rockets?

How can I take a picture of water rockets as they fly through the air? What settings would be best under normal daylight conditions? What is the slowest shutter speed I can use that the lighting will ...
2
votes
1answer
365 views

autofocus and maximum aperture of 60D [duplicate]

Possible Duplicate: What are the aperture limits for autofocus on Canon DSLR cameras? It is mentioned on page 79 of the EOS 60D manual that the center point AF is twice as accurate at ...
2
votes
1answer
123 views

Why does an aperture crop the image when you look through a lens itself but not when you look through the viewfinder?

I have been studying lenses for two days now and the aperture is very confusing. Based on the question here it appears that the aperture should not crop the image at all but when I look through a lens ...
0
votes
2answers
233 views

What aperture should be preferred while shooting the subject which is close enough, to get maximum sharpness?

From here: http://photo.stackexchange.com/a/20930/5205 f/8 sounds like a small aperture, and it might be good enough to get everything in focus in a landscape, but the closer (more magnified) your ...
7
votes
4answers
995 views

Do bigger focal lengths capture more light?

I never understood what the f really stands for in the f-stop values, like f/1.8. Wikipedia explains it in various articles, but I still find it very confusing. What I understand, though, is that it ...
6
votes
2answers
503 views

What is the effective aperture of two stacked lenses for macro?

Is there a way to calculate the aperture of two lenses stacked together for macro? In my specific case, I have 90mm f/2.8 and 18mm 1/3.5 lenses.
5
votes
1answer
1k views

Why does my camera show “f00” when using extension tubes for shooting close ups?

As a beginner in close up photography, I am using extension tubes with my Canon 550D and standard 18-55mm lens. I noticed that when I use this, the f-stop meter in the camera does not work and always ...
7
votes
4answers
1k views

Why are my photos taken at f/11 less sharp than those taken at a wider aperture?

I am new to photography. I have Fujifilm FinePix HS10 camera. Lately I was trying my hands on landscape photography. I learnt from different tutorials that setting high aperture value gets most of ...