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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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4
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4answers
1k views

Which aperture is the sharpest in the lens that come with Nikon d3100?

Wich aperture is the sharpest in the lens that come with Nikon d3100? I'm new to photograpy and I read about the "sharpest aperture" property that lenses have, but I read it changes depending on the ...
5
votes
1answer
624 views

Why do Canon lenses stay wide open when off camera, but Nikkor lenses keep tight aperture?

I have only noticed this for a handful of lenses so I am probably wrong in saying that all Nikon and all Canon lenses follow suit. But from those I have seen, Nikon tend to close the iris when removed ...
3
votes
1answer
233 views

How does the Dandelion chip affect the aperture lever with old lenses on Nikon D3200?

I'm trying to understand how adding the Dandelion chip to an old lens works in practice. I understand that the chip is programmed by the user with the focal length and max and min aperture. Am I right ...
7
votes
3answers
992 views

Why is F/8-F/11 called a “Who cares aperture”?

I've read for the second time this morning that whenever we don't know which aperture would fit best, we should take something between f/8 and f/11. Now my logic would dictate me to set an aperture ...
2
votes
3answers
2k views

Can I use a large aperture of f/2.8 while shooting landscape photography?

Can I take a picture of a wide area such as a big house at 10m, in low light, using a large aperture of say f/2.8, at a focal length of 50mm? I will have no subject between my camera and the house.
1
vote
1answer
98 views

Correct aperture to manage precisely blur and focus zones

There is something that bugs me about aperture... I understood that aperture will influence my picture on both light and focus zone. Now when taking a picture, I find it difficult to know precisely ...
0
votes
2answers
924 views

Settings for the Canon EF 100mm f/2.8L IS USM Macro Lens (both macro and portrait)?

I have a crop body camera (Canon T3i) and I'm renting the Canon EF 100mm f/2.8L IS USM Macro Lens for the weekend. I hope to use it for both macro shots and portraits. Can you recommend an aperture ...
8
votes
2answers
654 views

Do lenses with the same f-stop but different focal length gather the same amount of light? [duplicate]

I'm taking images of a light source in a scientific labratory, and I thought I had a good grasp on all these things, but now i'm second guessing myself after some results. The most important thing is ...
3
votes
5answers
554 views

Are there ultra-wide angle (<24mm) lenses faster than f/2.8? If not, why?

I started looking for an UWA lens (something in the mid-teens), particularly for doing milky way shots. Learning that you get trails with too long of exposure, I figured I'd try and find the largest ...
5
votes
2answers
730 views

What is a good rule of thumb to use large aperture for portraits vs showing more background?

I recently got a Canon 50mm and have found myself probably over-using the large apertures for portraits. I'm curious if anyone has a good rule of thumb for when to avoid it. My sense is that its ...
0
votes
2answers
126 views

Does a larger aperture automatically mean a bigger shot?

Say I take a photo with a camera that has the aperture and lens of, say, a camera specifically designed for wide-shots and large display ratios to capture more elements, such as a motion picture ...
2
votes
2answers
366 views

How do metering and aperture setting play together in manual mode (Minolta X-700)?

I have been playing around with my mother's Minolta X-700 (objective: Minolta MD 50 mm f/1.7) and though I read the manual (here it is: Manual X-700), I am still unclear about one thing: When I use ...
3
votes
4answers
558 views

How to fix a Nikon 100mm f/2.8 Series E lens not being properly recognized on a D300?

I have a Nikon 100mm f/2.8 Series E mounted on my D300. When I set the aperture on 2.8 on the lens, it is seen as 1.8 on the D300. At its maximum, when set at f/22 on the lens, it is seen at f/16 on ...
2
votes
4answers
549 views

Are there any lenses have smaller apertures than f/32?

While most photographers prefer fast lenses that range down to f/1.2, are there any lenses that go smaller than f/32? If there are, what is so special about those lenses that an aperture of f/32 ...
2
votes
1answer
177 views

Aperture value appears as '- -' in Olympus E410

I have just started using manual focus and prime lenses with my Olympus E410 (four-thirds). Intermittently, the aperture value is invisible, both through the viewfinder and in the LCD display. ...
2
votes
1answer
447 views

How to fix stuck aperture?

I have a Micro-Nikkor 55 mm 1:2.8 lens. The aperture appears to be stuck. Is it worth trying to repair the lens? Are there any good guides for disassembling the lens?
1
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3answers
312 views

How is the F stop number derived?

How are F Stop numbers derived? I have both a Canon 50d and a Panasonic DMC-LZ8k, a compact with full manual mode. When I set all settings but shutter speed identically between cameras, I end up with ...
11
votes
4answers
607 views

Why aren't lenses designed with extra large apertures for autofocus beyond what's used for imaging?

Historically, designing large-aperture lenses has been difficult because correcting the optical aberrations that arise from large apertures requires complex designs and very large amounts of glass. ...
2
votes
4answers
785 views

What is the best order to set exposure parameters (ISO, aperture, shutter)? [duplicate]

Let's say that you're in a very controlled environment, there is no hurry to get the shot, and you're shooting manual. In order to correctly expose the photo, what order should you alter the ISO (if ...
1
vote
0answers
41 views

Why is aperture built into the lens and not the camera? [duplicate]

Maybe this is physically impossible, but I'm curious why cameras have been designed where the aperture is controlled in the lens rather than in the camera like the shutter. Wouldn't building this in ...
9
votes
3answers
291 views

Whats the approximate aperture of a pinhole camera?

There are plenty of different pinholes you can make! Assuming I am being a little bit less creative and I am making a matchbox pinhole camera lens using a drawing pin in a sheet small sheet from an ...
9
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4answers
2k views

What is a “small” aperture?

It happens a lot. People refer to the aperture being small (or big!). By default does this imply a small opening of the iris (literal aperture), or a small f-value (how the aperture is measured, for ...
10
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3answers
423 views

ND filter vs stopping down for long exposures?

To achieve long exposures in daylight, one might need to stop down, or use an ND filter. By stopping down, the depth of field increases, but at some point the image quality/sharpness will suffer, due ...
5
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5answers
755 views

How can I shoot in a studio at the widest apertures?

I ran into a limitation while shooting a newborn baby this weekend. I was indoors next to a set of windows. I was also using an off camera flash on a stand through an umbrella. The flash was a Canon ...
2
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4answers
2k views

What is the best way to photograph a marathon?

I've had trouble finding information on how to best photograph action at a marathon. I don't mean tips for finding locations, ideas, etc, but rather technical tips for a beginning photographer to ...
3
votes
4answers
399 views

How is it possible to have shallow depth of field with a small aperture? (The tele-macro paradox.)

Some longer tele lenses have a macro mode that allows for really shallow depth of field that have a lot of background melting when using relatively narrow apertures; like f/4.5-6. I have tried and ...
0
votes
3answers
380 views

Image stabilization versus aperture [duplicate]

I want to do hand-held, natural-light photography in low-light situations, e.g. inside a room with a small window on a rainy day. No tripod, no flash. Canon claims that their "Optical Image ...
3
votes
2answers
531 views

What's the difference between real and effective aperture?

I understand that the simple idea that f-stop is focal length divided by aperture really applies to a simple single-glass lens, not the compound lens systems used to provide good image quality in ...
3
votes
4answers
1k views

Does micro 4/3 have an advantage in low light due to aperture equivilence?

Recent Micro Four/Thirds sensors seem to have improved their noise performance significantly. I own a Canon 5D Mark 2 full frame DSLR and am considering purchasing an Olympus OM-D EM5 micro four ...
3
votes
1answer
305 views

How do I properly understand what f-stop is? [duplicate]

I don't quite understand why most lenses seem to have approximately the same diameter aperture regardless of focal length. F-stop is, by definition, a ratio of focal length to diameter, so a 20mm ...
4
votes
5answers
718 views

How do I find the right motion blur/depth of field trade off in sports photography?

I could be wrong but when doing sports photography I'm always thinking about the following trade off: A fast shutter speed to freeze the action. A small(er) aperture to increase DOF and thus ...
4
votes
4answers
870 views

What is the optimal “default” aperture value in AV mode?

This is a very basic question.I am trying to learn how to use AV and TV modes with my T3i (after 2 years of shooting in Auto). What should I set my aperture to in order achieve the best results? I ...
0
votes
1answer
180 views

What are the biases in daytime and nighttime landscape mode?

What are the biases in day and nighttime landscape auto modes in terms of aperture, iso and shutter speeds?
6
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3answers
164 views

Does the time required to stop down the aperture affect the shutter response time?

In a (D)SLR. When pressing the shutter release button the camera must first move the diaphragm to the required setting. When a small aperture is selected it has to move it more than when you shoot ...
1
vote
4answers
285 views

Does an aperture value exist, where a lens creates a brighter image than the real view?

So (without limitations of the viewfinder for example) looking through the viewfinder creates a brighter image than normal view would be. The lens would then work like a funnel(collects light from ...
15
votes
2answers
835 views

Does a specific f number across all lenses denote same amount of light?

When we say a light source emits 1500 lumens of light, it does not really matter if the light source is incandescent, CFL, diode etc. Similarly, when I say f/1.8 can I assume that all lenses pass the ...
4
votes
2answers
2k views

Why does higher aperture (less light) make an image sharper?

Why does higher aperture, less light, make an image sharper? Or rather make everything in focus? And how does this lead to lenses having a sweet spot in sharpness?
1
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3answers
434 views

What's the difference between a closed and open aperture diaphragm for night street photos?

I'm capturing a picture during night and to a street with a lot of cars running over the street. What happens (in general, from a theoretical point of view) if I shoot the same photo under the ...
3
votes
1answer
113 views

Can custom (or any) function override aperture on a Canon 7D?

I'm a new owner (1 week) of a Canon 7D and a 28-135 USM lens. While experimenting and just shooting randomly, I was surprised to see my aperture setting (through the viewfinder) showing me a 2.8. Is ...
1
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1answer
18k views

How to change Shutter Speed and Aperture on Canon T2i?

I have a Canon T2i and I am having a hard time figuring out how to change the shutter speed and aperture. I have tried reading the manual but it seems to be a little unclear. Can someone please point ...
1
vote
3answers
375 views

Is it possible to calculate focal length if you know the aperture?

I need focal length (for my IA homework), but I didn't know that in real world I would only get the aperture. Ok, my camera is an Olympus X-21, and manual says: -----Olympus lens: 6.3 to 18.9 mm, ...
10
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2answers
1k 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
238 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 ...
-2
votes
1answer
476 views

Why are some original files unavailable for export from Aperture?

I started using Aperture a year ago. I never spent any time watching Lynda.com or anything else, I just thought I figured the darn thing out, as far as downloading images. I plug my phone or Canon ...
1
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1answer
363 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, ...
14
votes
2answers
940 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
754 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
288 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?