Aperture is the opening in the diaphragm of a camera lens.
5
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7answers
6k 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 ...
3
votes
4answers
280 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
185 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
263 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
146 views
What is the best order to set exposure parameters (ISO, aperture, shutter)?
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 ...
6
votes
4answers
343 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 ...
14
votes
5answers
6k views
What is an easy way to remember the full stop scale?
If you were teaching someone new to photography the full stop scales, is there a better way then flat out memorizing these values? Does anyone have an easy way that they remember the scale? Would it ...
1
vote
0answers
35 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 ...
31
votes
3answers
6k 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 ...
5
votes
6answers
6k 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 ...
5
votes
1answer
117 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 ...
10
votes
3answers
261 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
votes
5answers
366 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 ...
13
votes
6answers
1k 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 ...
2
votes
4answers
247 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 ...
2
votes
1answer
158 views
Why do the Nikon V1 lens' websites seem to give different f-stops than the lenses? [duplicate]
Possible Duplicate:
How can aperture be f/11 on a lens with an aperture range designation of 3.5-5.5?
I am a recent (and so far quite pleased) owner of a Nikon V1. I am in the process of ...
0
votes
3answers
140 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
108 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
1answer
242 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 ...
3
votes
4answers
225 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 ...
4
votes
4answers
185 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 ...
4
votes
5answers
201 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 ...
17
votes
4answers
2k 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 ...
0
votes
1answer
94 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?
32
votes
6answers
3k 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 ?
6
votes
3answers
143 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 ...
7
votes
6answers
2k views
Technically, why is the out of focus area blurred more when using a bigger aperture?
I'm wondering, technically, why and how does the out of focus areas blur more when using a bigger aperture. I think it'd help a lot if I presented a problem that's been driving me nuts for a long ...
1
vote
4answers
202 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
393 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 ...
11
votes
5answers
908 views
How can aperture be f/11 on a lens with an aperture range designation of 3.5-5.5?
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 ...
26
votes
4answers
1k 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 ...
17
votes
3answers
925 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 ...
4
votes
2answers
308 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?
0
votes
3answers
164 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 ...
4
votes
2answers
569 views
What's the base f-stop when counting an ideal f-stop for lens?
I've read a lot around this site that an ideal quality of the lens is achieved when using f-stop roughly 2 stops slower than the fastest value of the lens.
Firstly, I'm not exactly sure what "2 ...
3
votes
1answer
94 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 ...
12
votes
3answers
961 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 ...
0
votes
1answer
731 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 ...
-2
votes
1answer
134 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 ...
0
votes
3answers
194 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
votes
2answers
470 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
116 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
162 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
433 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 ...
13
votes
2answers
509 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
762 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 ...
3
votes
9answers
688 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
32 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
247 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 ...
