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Questions tagged [iso]

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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Auto Iso Scan Problem

I have an Akica Ez View that automatically scans film from ISO 100 to 400. Can I still use my ISO 50 film?
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Does red noise even at low ISO values mean a hardware problem with my camera's sensor?

I have an Canon 200D (Rebel SL). I am concerned about the red noise in the darker parts of the picture, at low ISO values. Especially in the blue sky. Could this be a hardware problem with a sensor? ...
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Why is same image exposed at 100 ISO noisier than 3200 ISO? [duplicate]

I used to believe that ISO adds noise as a drawback to increasing exposure, but after researching the topic I arrived at the conclusion that it is a misconception. By amplifying the existing signal ...
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What causes grainy film pictures?

So I got a film roll developed, Kodak Colorplus 200. The results aren’t what I expected. Most of my pictures are either grainy, overexposed, or underexposed. I thought it was because I shot most of ...
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What is DX film encoding?

What is "DX encoding" of roll film, such as 135 format film used in 35mm cameras? How does it work? When was it introduced? Is there anything else I need to know about using DX encoded film in a ...
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How do I figure out what ISO to use when shooting film?

I'm new into film and I recently bought a pack of 200 film. I'm just not sure what ISO to use. I don't want my photos to come out over or under exposed. (I have a Minolta X-700)
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What is the relationship between film speed and the ISO setting on my film camera?

What is the relationship between the speed number of the film you put into your film camera and the ISO adjustable setting on the camera itself? Do you put them on the same number or do you adjust ...
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1answer
109 views

Why does a non-linear relationship exist between noise level (of dark frame) and ISO setting

According to Does changing the ISO of a modern digital camera really change the gain of an electronic amplifier?, the ISO physically amplifies signal in analogic way, so it is more effective than ...
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Overexposed and not clear photos Olympus stylus 1

I am having some issues when taking photos with my Olympus Stylus 1. When setting things in auto photos are overexposed and a bit blurry. I have taken the same photo with a GoPro5 all in auto and the ...
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If I use my digital camera (w/min. ISO of 200) as a light meter, how do I set exposure for ISO 100 film?

I have a Fuji X-T100 and its lowest ISO setting is 200. Now, I’d like to shoot some slides like Provia 100 or Ektachrome 100 as well as Portra 160, using my Fuji as a light meter (it works pretty well ...
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Why does push processing seem to be so popular?

It seems that many people are very eager to push their film. If you check sites such as Flickr or other communities discussing film photography, it can feel like almost as many people are shooting at ...
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How can I guess a film's specifications?

In order to try and identify the correct type of "Mystery Film" that I bought and mentioned here, I would like to make a few tests. 1 - Can I shoot several photos on the same roll with a different ...
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Is there a technical reason for low ISO settings to disappear?

Compact superzoom cameras, for obvious optical reasons, have stuck remarkably constantly at the 1/2.3" sensor size. CCD has been superceded by BSI CMOS but light gathering did not change all that ...
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Increase ISO or use Photoshop post production exposure correction ? [duplicate]

With some slow lens, and in some situation I tend to under expose. Situation like action where i need to freeze movement, I use obviously fast shutter. When I open my RAW in Photoshop and I click ...
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1answer
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Can I set non-full stop ISO values on my D3400?

I recently got into photography and use a Nikon D3400. I have started shooting in Aperture Priority and Manual modes about 2 weeks ago and I noticed something strange regarding the ISO. When I am ...
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Red noise in lower edge and corners

I would like to ask for your opinion whether in your past experience you have seen similar kind of red noise in lower parts of your pictures in low-light settings? It shows up in lower edge and ...
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1answer
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How to shoot thinner light trails using an iphone app

I have taken several photos using an iPhone8 plus, tripod and using a procam app that allows control of the shutter speed in order to shoot light trails which I have successfully done, however the ...
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Canon DSLR photos underexposed [duplicate]

I have a canon DSLR and even in Manual mode or with proper settings, I have to bump aperture, shutter speeed AND ISO to get photos to be even CLOSE to the right exposure. Currently have my ISO set to ...
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Comparison of camera sensitivity

There are different ways to quote the sensitivity of cameras. Usually it's quoted in ISO or ASA. ASA and/or ISO is usually reasonably well-defined in the absence of any deviating statement as ISO ...
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Will digital exposure above unity gain result in raw file with full bit depth?

As I understand, digital cameras have a unity gain ISO: an ISO setting at which no gain is applied. Below this ISO negative gain is applied, in effect ignoring some of the photons, and above positive ...
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Can different ISO settings be preserved when switching between different Exposure Modes on Canon DSLRs?

Aperture settings are independent in Manual (M) and Aperture (Av) mode on a Canon body, meaning if we set the aperture to F/1.8 in Av mode, M exposure mode wouldn't copy the same aperture ...
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2answers
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How to get bright concert photos?

I've been starting to shoot some live music recently and have been doing an okay job and see an improvement with each time I shoot. However recently I was shooting and all of my photos have come out ...
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Can I use a higher ASA / ISO with a point and shoot film camera which says it only goes to 400?

If I have a film camera (point and shoot) that only goes to ASA 400 can I still shoot with film that is higher ASA like Porta 800 or 1600? I’m trying to shoot at night? Mostly looking for dark tones ...
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Why are my Portra 400 pictures darker than Portra 160? Shouldn't higher ISO result in brighter pictures?

I'm trying to gain a better understanding of taking pictures in film. I usually shoot in Portra 400 and I love how contrasty the pictures are, but iI can't help but notice that when I shoot with ...
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2answers
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ISO to shoot very very dark object with a tripod [duplicate]

I want to take a picture of a (almost) pitch black landscape at night. Like a mountain or trees at night. The object will not be moving and I will have a tripod. I am not sure what is the best way to ...
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Why do different ISO images have different file sizes? [duplicate]

I set the ISO on my Canon 6D to 200: 1081 estimated shots remaining. I set the ISO to "auto": 728 estimated shots remaining. I'm shooting in RAW, if that makes a difference.
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How is it possible to have shallow depth of field in very bright conditions?

When setting the aperture at f1.8 you are for sure going to overexpose the image. When I'm out at the beach I set my GH5 at f1.8 with the shutter speed 1/8000 and my iso at 200, but I still get an ...
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5answers
628 views

Is it technologically possible for a sensor to run two ISO's at once?

This question (Why don't digital cameras have better dynamic ranges?) combined with a typical sunset photo got me thinking... Exposure differences between sky and ground in a sunset shot are ...
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1answer
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Why does the Canon SX60 HS restrict ISO to 100 with exposure times longer than 1.3 seconds?

After trying unsuccessfully to take pictures by night with my Canon SX60 HS, I noticed that I could not set the ISO to more than 100 with long exposure (> 1.3"). This behavior is well explained in ...
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What is considered High ISO?

So reading the questions I came across this Why do cameras include very high ISO settings even though they are so noisy? and my comment on this answer led me thinking, how do we qualify high ISO? Is ...
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Why do cameras include very high ISO settings even though they are so noisy?

Why do they make DSLRs' ISO settings go so high? I own three different Nikon cameras and every one of them, once you pass a pathetic 320 ISO, the noise in my photos is lousy and — all 3 cameras cost ...
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If I push film can I keep all other settings such as aperture and shutter speed the same or do I have to change them as well in some way?

If I push 160iso film by 2 stops, and shoot a scene at 1/500 @ f16 as if I would have shot it with 400iso film at 1/500 @ f16, will I get a similar exposure by pushing the 160iso film? Basically, if ...
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Why am I getting color bands at high ISOs?

I have an old Nikon D80 with me. When I shoot with higher ISO, like 800, vertical color bands are produced in the image. Why does it happen and is there any way to eliminate it? Example with high ...
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Portrait photography [duplicate]

Is there any advice for shooting portrait in dark room, using only lamps. I am little bit confused with iso,aperture and shutter speed because i photographing with analog film.
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Dealing with exposure time during sports photography

I am very new to photography and trying to improve my skills (I don't even know if I have creativity required for photography). I captured some shots of sports. The link to my album (just 6 pics) is ...
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7answers
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Why am I getting a lot of noise at 1000iso when my camera says it can go up to 6400?

My Nikon D7100 is getting a lot of noise when I bump up the ISO to even 1000. How do I reduce that? It says it can go up to 6400 which is one of the reasons I got the camera.
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4answers
167 views

How to take photo of water splash without photo getting dark? [duplicate]

I just got my beginner DSLR (Nikon D3300) and tried to take a photo of a water splash. I read about aperture, ISO and shutter speed and I know if I set high shutter speed I need to set low aperture ...
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2answers
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Is ISO 800 too less for taking pictures in a room with lights on?

This question is related to this camera (Point and shoot): Canon SX 430 IS It looks good for me but many of my friends are saying it's good for only day light photographs. I want to shoot in day ...
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Why did the shutter speed increase when I raised ISO and lowered exposure compensation in Aperture Priority mode?

I have a Sony A6000 camera and I am studying photography. I was experimenting with ISO and exposure compensation while in Aperture Priority mode and encountered this situation: I set the aperture to ...
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Exposure compensation after images are taken

I have a stack of image tiles (taken from a drone) that I want to mosaic to a single image. I want to do exposure compensation to reduce the variation in illumination between the image tiles before ...
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4answers
264 views

Is this an ISS capture?

I am not sure my question is on topic but I am going to fire it likewise. I was wondering about the straight line captured in the picture posted at the bottom left side. If not mistaken, I 've seen ...
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1answer
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Camera calls some ISO settings extended, but the technical specifications do not

I am looking at a late-model Olympus digital camera and my curiosity is piqued by seeing that, although the camera itself specifies that ISOs of 8000 and higher are extended, neither the technical ...
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4answers
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Is it true that the best images from all digital cameras can be obtained at ISO 200?

Recently a very professional photographer who shoots stunning pictures told me that the best images can be obtained from digital cameras at ISO 200. He also stated that this is what all the ...
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3answers
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Recommended ISO setting when shooting with Ilford Delta 400 Professional film?

I am shooting with a Canon EOS Rebel X S and I am using Ilford Delta 400 professional B&W for the first time, any recommendations which ISO setting I should use? I have heard 320.
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2answers
441 views

Does changing the ISO of a modern digital camera really change the gain of an electronic amplifier?

The question Why would using higher ISO and faster shutter speed yield more noise than using lower ISO and slower shutter speed? currently has five answers, and four of them contain the word amplify ...
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7answers
376 views

How do I know which combination of aperture and shutter speed yields enough light to have pictures with minimal noise?

This is a kind of continuation of this question. I'm shooting a poorly lit object. Camera has fastest ISO value of 3200. I set aperture to some specific value and don't alter it, the object is ...
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7answers
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Why would using higher ISO and faster shutter speed yield more noise than using lower ISO and slower shutter speed?

I'm trying to see how this answer correlates with practice. That answer basically says I need to let enough light into the camera and then use the highest ISO value and I'll get the lowest noise then. ...
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2answers
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Why is ISO so low in iPhone?

I am noticing that the ISO setting is quite low, usually 20 or 32 ISO when I take photos with iPhone. Why is it so low? How come a prosumer DSLR cannot get that low ISO?
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6answers
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Why use ISO instead of Aperture and Shutter speed? [duplicate]

I am a beginner in photography and I don't have the right understanding for some things. As I understand, with the ISO the camera is more or less sensitive light, with a darker image, a higher ISO (...
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2answers
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Bluish hue on the edge of the photo

I really do not know what and how this happened to my Panasonic Lumix FZ40 after using it for about 4 years (still not intelligible enough on using it), and I do not know the right term for it to be ...