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Tagged Questions

ISO is the measurement of the camera's sensor/film sensitivity to light. It is one of the 3 ways to create a well exposed image (The other two being Aperture and Shutter Speed). Typically, a higher ISO for a correctly exposed image will result in the image being more noisy/grainy.

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2answers
65 views

Can someone explain film speeds to me? [duplicate]

I know the whole 200 400 800 is based on the speed of the film & say youre in a dark room with dim lighting, 800 would be a better choice to use.. But i have searched through flickr and i see most ...
2
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2answers
130 views

Does it make sense to “Expose to the Right” except at base ISO?

I have read in a number of places that exposing to the right (ETTR) only makes sense at your camera's base ISO, with the justification being that if you are boosting the gain in camera (by raising the ...
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4answers
2k views

Why is it called ISO “speed”?

As I understand it, the ISO value indicates how sensitive the sensor/film is to light. How is this related to speed? Is it something to do with how fast old chemical film developed?
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0answers
54 views

Difference between shutter speed, iso and Aperture [duplicate]

What are the main differences between shutter speed , iso and aperture? 1.How are they interdependent? 2.Because every three of them are controlling the light,it gets very confusing how? ...
3
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2answers
83 views

Why does ISO sensitivity affect sequential burst mode duration?

I have an Olympus E-PM2 and while testing a new SD card I learned that the camera's ISO setting affects the number of pictures that I can take using sequential burst mode. When shooting raw at 8 fps ...
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12answers
3k views

Why use higher ISO when using a tripod and the object is static?

Sometimes when I see a photo such as this one, I wonder why the photographer chose such a high ISO (640), despite using a tripod with a static subject. As far as I know, a lower ISO means less noise, ...
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4answers
106 views

Can exposure parameters be kept high even at high ISO sensitivity, to keep image quality up?

Following is from Film speed Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ...
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3answers
131 views

Optimum ISO? How can I tell? [closed]

I Own a Canon 60D what is the optimum ISO can reach without getting much Noise?
4
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3answers
501 views

Digital ISO vs Post-Exposure Correction

As far as I know, a ISO setting on a DSLR camera corresponds to a mixture of both analog and digital settings set before a shot is taken and governs how much amplification the incidence luminosity is ...
6
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4answers
240 views

Are the aperture, ISO and shutter speed stops perfectly interchangeable?

Imagine you have an scene with shutter speed 1/60, f/8 and ISO 200. Then you change the configuration to get an equivalent exposure: speed 1/120, f/5.6, ISO 200 (plus one stop in speed, minus one stop ...
2
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2answers
793 views

Stopping down in manual mode with automatic ISO?

I am using a Canon 5D MKIII. I take a lot of low-light fotos and want to achieve low DOF while keeping the photos sharp with fast-moving subjects (musicians), using a 5mm 1.4 lens. So far, I always ...
0
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2answers
137 views

How does a camera in an automatic mode choose what exposure, aperture and ISO to use? [duplicate]

For example: Does the camera detect if the scene contains fast-moving objects and if so use a shorter shutter speed? Does it detect if the entire scene is beyond the hyperfocal distance, and there's ...
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2answers
311 views

Why doesn't an f/1.8 lens result in a lower ISO than an f/2.8 lens?

When I bought my Sony NEX-5R, I had a choice of an f/1.8 or an f/2.8 lens (both are prime, normal lenses). I was told the 1.8 will work better for low-light photography since it will let in lot more ...
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2answers
271 views

Exposure compensation or ISO sensitivity? [duplicate]

If ambient light isn't enough and I don't have a tripod with me for long exposure, which one should I prefer to increase the brightness of my photo? I know high ISO comes with noise. Is there any ...
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vote
1answer
3k views

What is the Base ISO of a Canon 5D MK III?

Can anyone tell me what the base ISO is of a Canon 5D MK III? I was reading this great piece on ETTR (1) and (2) and it repeatedly mentions how important shooting at Base ISO is when using ETTR. I ...
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7answers
410 views

Are these photos ruined because of ISO? [closed]

I took a lot of photos during a family get-together and I really liked many of them. My girlfriend then edited the photos to make them look better. The photos looked GREAT on her iMac monitor but when ...
17
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2answers
829 views

Why do I see this yellow color shift at high ISOs and fast shutter speeds? [duplicate]

I recently purchased a full-frame DSLR with a reported highest ISO of 204,800. I’m intrigued by the possibilities of the high ISO range and how far Lightroom and Aperture (I use each of them) can ...
0
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1answer
206 views

I have acquired an old Minolta Freedom Dual point-and-shoot. What ISO does it shoot at?

I have acquired an old Minolta Freedom Dual point-and-shoot camera. It's a straightforward enough device, and pretty automatic: no user set aperture or shutter-speed settings. But obviously it's ...
2
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1answer
149 views

What does fast/normal/slow mean for Pentax auto-iso?

I'm very confused about the Pentax auto-iso implementation. What does "fast/normal/slow" mean for the Auto-iso in the menu settings? The camera in question is a K-3, but I think it applies pretty ...
6
votes
1answer
451 views

Fuji X100s: Why are high ISO settings (>6400) only available in JPEG and not in RAW?

Reading an article about the Fuji X100s, I came across this quote: [...] the high ISO setting is only available when shooting in Jpeg Fine format. When shooting in Raw the highest ISO setting is ...
7
votes
2answers
230 views

Do low ISO photographs need Long Exposure Noise Reduction?

I usually took long exposure photo with ISO 100, so do I really need to turn on Long Exposure NR on? It really take time for processing.
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0answers
96 views

What is happening in the sensor when you change the ISO? [duplicate]

I understand the relationship between ISO, aperture and shutter speed. What I'd like to know is what actually happens in the sensor when you raise or lower the ISO number? In other words, what is ...
3
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3answers
231 views

Shooting objects under glass with pop-up flash

I sometimes need to take photos of new devices kept behind glass at trade shows. Currently I have to depend on my camera's in-camera flash. Often the picture is spoilt because of the flash's reflected ...
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3answers
236 views

Why does the live view switch off for a long time and my photo is of low quality when I take a picture in low light?

I have Nikon D3200. I am trying to take picture in A mode. I have set Aperture f/3 and ISO to 200. I am taking a picture in very low light. The problem I am facing is that when I press the shutter ...
6
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4answers
457 views

What “influences” the ISO sensitivity of the camera?

In comparing, let's say Canon's 600D and 100D (which are by explanation from my store guy, practically the same camera) I noticed that they have different ISO sensitivity declarations. Since, they ...
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1answer
262 views

How to denoise a dark photo with extremely high ISO?

There are situations where I would reluctantly have to turn the ISO to the larger extreme. Nevertheless I can get some photos that I pretty much like under these circumstances. Here is an example. ...
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2answers
105 views

How do i select right exposure? [duplicate]

I have canon EOS 600D and also I have following lenses: 18-55mm 55-250mm 40mm f/2.8 How do I select correct exposure. what is the sequence of priory. currently I first changing the iso, ...
2
votes
1answer
154 views

What is the fastest film (highest ISO) made commercially?

On wikipedia there is a reference to Polaroid 612 which is ISO 20000. Was there faster film? Was there faster film made for specialized purposes (say military, astronomy etc)?
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2answers
196 views

How about high ISO (low light) performance testing of sensor with camera's auto-ISO option?

I'm in the market for a camera with better high-ISO capability than my current ones. There are more than enough reviews on the internet that measure cameras' high ISO performance. They usually pit one ...
13
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1answer
720 views

Is it really better to shoot at full-stop ISOs?

The second half of this answer says Notice that I only shot full-stop ISO which is important with Canon DSLRs because the gain to obtain the 1/3 stops in between is applied in software by the ...
1
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3answers
3k views

What is the highest acceptable ISO to use for weddings with Canon 7D?

I recently had my first wedding shoot(yippie!). For a person like me who usually shoot still life and landscape, weddings is a whole new world. I am used to shooting at low ISO's (800 or less) but the ...
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5answers
383 views

For night photography with lots of unexposed areas, should I go with high iso and low exposure, or low iso and high exposure?

I have been doing so much research on iso, and for awhile I've been going with the theory that low iso= less noise, so I've been shooting at iso 100 and then adjusting my flashlights and increasing ...
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3answers
220 views

Can we always talk about noise difference between crop and full frame?

Let's say we have two systems: 1) full-frame camera, 80 mm lens at f/2.2 2) APS-C camera, 50 mm lens at f/1.4 The subject is the same, as well as the camera position, focus distance, shutter speed ...
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2answers
117 views

How to take a moving object(far distance) in outdoor low light situation?

It's always been tricky to me how to take a far distance picture(moving) in a low light situation. I don't think flashlight would help in this case since it can't reach to the moving object. For ...
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5answers
307 views

High ISO or faster lens for a distant evening portrait?

There's a kid in the apartment across the street from my west-facing house. She comes out to their balcony at about 5pm. It's a delight to see her play and I have often tried to capture her smile, but ...
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4answers
2k views

What ISO should I use on my Nikon D5200 to avoid visible noise in 4×6 prints?

I recently bought a Nikon D5200. For several of the photos taken the ISO setting I have used has been high — in the range of 1000 to 4000 (most of them were in poor light, without flash and in manual ...
2
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4answers
834 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 ...
12
votes
7answers
1k views

Can someone give a simple explanation of ISO?

Can someone please explain to me what ISO means in the camera settings. In an answer to a question about taking pictures at a dance party, I was told to use ISO 1600. What does that number really ...
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9answers
1k views

Should higher ISOs really be preferred (all other things being equal)?

My understanding of the ISO setting on digital cameras is that, unlike film-cameras, changing the ISO does not evoke any physical change in the camera. Rather, it simply tells the camera to multiply ...
2
votes
2answers
257 views

Image stabilization versus ISO speed

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. I assume that compared to a tripod, image ...
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 ...
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1answer
494 views

Why doesn't the Nikon D90 use ISO lower than 200 in very bright areas? [duplicate]

I've got a D-90 Nikon and a f1.4 lens and I've found in very bright areas like beaches in the Caribbean, when I have the camera doing auto ISO and speed and fixed f-stop, sometimes I get overexposed ...
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1answer
174 views

Why is high speed (ISO) film more expensive than low speed film?

And why is film much more expensive than paper? Is it the silver content? Production volume? Does is it take more effort to produce larger grain?
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1answer
186 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?
5
votes
2answers
1k views

Why isn't expanded ISO settings (L / ISO50) enabled on Canon DSLR's by default?

It bothers me a bit when I have to hunt through menus to find the 'enable expanded ISO settings' setting in my 5D mkIII. I'd like to know why the low ISO's are disabled however and if there is any ...
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9answers
16k views

Is it better to shoot with a higher ISO, or use lower ISO and raise the exposure in post-processing?

Suppose there are two photos taken in the following scenario: Scenario 1 - Photo taken using ISO of 3200. Scenario 2 - Photo taken using ISO of 100. Both photos are taken in a medium light ...
4
votes
5answers
372 views

Why is a low base (minimum) ISO desirable in stills cameras?

Why is low base ISO so desirable in stills cameras, when the opposite seems to be true for digital motion picture cameras, for instance Arri Alexa, Sony F65 and F55, Canon C300, C500? As an amateur ...
2
votes
1answer
216 views

Why is my ISO so high in auto mode?

New user of a Canon 7D - less than 50 shots taken. Last night, I needed to take a quick picture of something that was on my cell phone with my Canon 7D I propped the phone up against a white pillow ...
3
votes
7answers
587 views

Can ISO vary on different cameras?

We all know that [ISO] + [shutter speed] + [aperture] = a great picture. Now, let's take two different (very!) cameras: Nikon D3100 vs Nikon D800 and set them on Aperture priority. Settings for the ...
0
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1answer
923 views

What does ISO stand for? [duplicate]

I've recently been learning how to use a camera, and was wondering what ISO stood for?