Aperture is the opening in the diaphragm of a camera lens.
11
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3answers
2k 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
259 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
356 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
203 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
684 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
723 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
419 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
203 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
336 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
271 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 ...
4
votes
3answers
617 views
How important is a fast aperture in a wide angle lens?
I am looking for a good wide angle lens: I am looking at the Sigma 8-16.
It has great reviews, by far the widest angle I can get on my camera. Only thing I am worried about is the relatively low ...
3
votes
1answer
364 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
640 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
99 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 ...
1
vote
0answers
148 views
Sharing metatdata editing with Aperture and PhotoMechanic
Is it possible to have enable editing photo metadata (keywords, rating, stars, color) in both Aperture and Photo Mechanic if the files are stored in Aperture as "referenced" files?
I did a quick ...
-2
votes
1answer
237 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
517 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
175 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
548 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
306 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
1k 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
1k 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 ...
5
votes
5answers
2k 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 ...
2
votes
3answers
590 views
What are the types of aperture blades?
The Canon EF 24-105mm f/4 L USM IS lens has rounded aperture blades. What other types of aperture blades are there, and what are the advantages and disadvantages of each of them? Is the aperture ...
2
votes
3answers
173 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
445 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?
1
vote
1answer
117 views
My “flag” option is gone from Aperture
I have always used the "flag" option to tag my favorite pictures to go to later, but for some reason it's no longer there. Did I accidentally press on something that took it away?? Anyone know what I ...
10
votes
2answers
287 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 ...
15
votes
2answers
531 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
72 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 ...
18
votes
4answers
2k 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
215 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 ...
0
votes
3answers
3k views
What is the relationship of aperture, focal length, and ISO in a SLR?
I was using Nikon digital camera, and recently bought a Canon 550D. I am totally new to SLR.
I am not familiar with SLR terms: Aperture, focal length and ISO, and their relation to one another.
What ...
10
votes
2answers
3k 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 ...
11
votes
2answers
1k views
What is T-number / T-stop?
Usually, when discussing aperture of a lens, F-stop and F-number are used for quantifying. But some photographers, and especially videographers, also mention T-stop. The concept and numbering used ...
15
votes
7answers
826 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
402 views
How does aperture affect exposure?
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
302 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
390 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 ...
4
votes
4answers
340 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
276 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
101 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 ...
3
votes
4answers
384 views
What is the technical name of the lens which has a fixed aperture but zooms?
What is the technical name for a lens which has the same maximum aperture throughout the entire zoom range?
0
votes
2answers
195 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 ...
4
votes
4answers
489 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
338 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
583 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
758 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 ...
3
votes
5answers
2k views
In what kind of scenes does it make sense to use f/1.4 aperture?
I have been told that it is difficult to focus with an aperture of f/1.4.
So, in which kind of scenes does it actually make sense to use the f/1.4?
In portraits they say that it is important to keep ...
1
vote
1answer
375 views
Why does the max aperture change when use Nikon 60mm AF-D Micro on D90 camera?
I have found that my Nikon 60mm Micro AF-D changes aperture from 2.8 to 3.2 when used with a D90. I have tried both A and M mode. Is it by design? Why?
I intend to buy Nikon 50mm 1.4 AF-D, but it ...
