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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27 views

10 year old 35mm film roll 500T

Hello I have 50m of Fuji Eterna 500T from 2010. What ISO should I rate the film/canister? Should I rate it as an 200ASA or 400ASA?
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Why do some DSLRs have ISO less than 100?

The lowest ISO value in most cameras is 100. But some have less than 100. Why is that so? Does that mean these are more sensitive? And how low can the value be?
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What is the role of Shutter Speed while using a Manual Flash?

The relation that allows us to set the aperture or to choose the distance to take a photo with correct brightness while using a manual flash is this one: Guide number = f-number × distance, For a ...
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How can a camera with a small sensor have better low-light performance than a camera with a bigger sensor?

In Potato Jet's video comparing the Canon M50 versus the Panasonic G7, you can see at 8:51 that the Canon M50 has a more noisy image in low light compared to the Panasonic G7, even though the M50 has ...
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What are the practical differences between the exposure settings my camera picked for me in auto mode and my own choices?

I were using Fujifilm x-t20 and I took two photos: one with 'Auto' switch on and the other with 'Auto' switch off. I compare the two and I cannot find noticeable difference. and the settings Here ...
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Calculate the right ISO and exposure compensation based on the ambient light

I'm new to photography and I'm working on this project where I need to find the right balance between ISO and exposure compensation, to take pictures in different environments. This is an App for ...
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ISO how high is right at night

My only camera is my cell phone which is a good one however the ISO only allows up to 800 when I've seen plenty higher on other cameras. Is that a sufficient number to work with once evening falls or ...
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ISO changing accuracy of skin tones and white balance?

I'm wondering why the ISO has seemingly changed the white balance and its effect on the skin tones of the groom especially, when the only differences here are ISO and shutter speed. Both images are ...
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How to avoid noise in Aperture Priority mode arising due to auto-ISO?

I was taking photos of birds in a cloudy day and in an area of forest where light was even low under a tree as compared to other areas. I used 70-300 mm kit lens. When trying to take photo even at 1/...
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Why buy a Pentax K1-II over Pentax K1?

I have looking for my dream DSLR with sensor shifting thus pure color along with no low pass filter. I fail to see any differences other than tripled max ISO but why buy the second gen Pentax K1? ...
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Does doubling the ISO reduce the shutter speed in half? [duplicate]

Simple question really. When you double the ISO does it mean your shutter speed needs to be half of the original value to have the same brightness in the image?
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What settings to use for indoor sports (water polo) with Nikon D90?

I need to use high ISO for movement, but lighting is poor due to being inside and no flash allowed. What are my best options for a clear picture of action?
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Is there any reason to change the ISO manually?

Here's my understanding so far. When taking a photo with a digital camera, there are some tradeoffs: Aperture size: bigger aperture lets in more light, smaller aperture means less blurring in space. ...
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What are the ISO, exposure, and aperture settings for single frames from slow-motion video on the iPhone 6?

I filmed a video of myself swinging a tennis racket in slow motion and then used cv2 to make jpg's of some of the frames, ie. 8 frames from the start of the swing to follow-through evenly spaced, and ...
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Changing the camera ISO , Aperture, Shutter Speed with Android

I have a smartphone with Android 8.0. I need control over : ISO Aperture Shutter speed Could you please suggest the way to go forward? I do not know how to change any of them? I am using an ...
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Redscale/ yellow scale, is the following scheme true?

So I was looking on this tutorial about redscale, which is a term that describes loading color negative film with the base side of the film facing forward so that the film is exposed through the "back"...
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What does the ISO setting for mechanical 35mm film cameras actually do?

I am wondering if the ISO setting affects the aperture or does it just makes some shutter speeds unavailable to be used? Edit: I have a Konica Autoreflex T with a broken light meter.
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Does high ISO/ASA break the camera or detoriate it faster?

I don't know how strong the components are but amplifying electric signals seems like a great idea to exhaust the internals and there is also extended ISO values.. Like overcharging thin electricity ...
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What is the physical cause of increasing noise at high ISO?

Which is the physical cause of the increasing noise at high iso? I know that Iso represents the sensor/film sensitivity to light: at lower iso we need an higher exposure time to get the image of the ...
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Highest possible ISO? [closed]

What is the theoretical upper limit on ISO for a digital image sensor? (I imagine any limit must be a function of sensor pixel size, since once all electronic noise has been eliminated then shot ...
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What is happening with 35mm film after expiration date?

What is happening with 35mm film after expiration date? Will the ISO drop, so for example 200 ISO film one year after expiration date will be at an equivalent ~100 ISO?
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229 views

Why does ISO revert to Auto when set on 100 in manual mode on my Canon RP?

I'm new to photography and think I have a good grasp of the fundamentals of the exposure triangle. When using flash in a controlled studio environment, I want to set my ISO at 100 and compensate ...
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546 views

How to develop and scan film strip which only part of it pushed to higher ISO

I have a film strip with TMax-400. Out of 36 frames, I pushed 10 of them to ISO 1600. If I want it to develop in my local store. How should I instruct them to develop my negatives? Also what are ...
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How far to push ISO with Tmax 400 film?

I have a 400 ISO film (Kodak TMax). If I want to push the ISO on my FM2, what is the best setting? Is it ISO 1600, 800 or something else. I notice that pushing to 1600 is very common. Why is that ?
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173 views

How to get rid of brighter dark areas of the object while taking photo or by editing it later?

I'm having a little hard time taking photos of my pencil drawings. I recently posted a question about noise & blurriness. Here the thing is, my art looks much better on paper but when I take ...
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How can I use 400 ASA film in a Leica IIIf, which does not have options higher than 100?

I bought 400 ISO (color) for my Leica IIIf, but found out the highest setting is 100 ASA/80 Weston. What should I keep in mind when taking photos regarding other settings? It’s going to be rather ...
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Is the following video explaining ISO accurate? [duplicate]

So, I was searching for the exact mechanism behind the workings of ISO (or film speed) in digital camera. I found this video and it was pretty simple. But i was wondering if this video is accurate and ...
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What is causing these stripes in my images?

Please don't mind the edited faces. All over the image are visible white stripes horizontally. What could cause them? The image was taken without a flash on a Canon 5D Mark II. Could this be a sensor ...
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Astrophotography-what wrong I am doing here?

I am beginner in photography.I clicked this photo in RAW, f3.5, ISO1000, S15", Manual focus without tripod.Lens: Nikon AF-P 18-55mm. I think it is out of focus. I varied ISO from 1000-2500. Shutter ...
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1answer
345 views

Ektar 100 pushed to 800 ISO and standard development on High Street

If I change the Dx code for Ektar 100 to 800 ISO. Take pictures at night/ cloudy day and then develop it at the High Street studio (without letting them know about ISO), will I get good results?
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What is the possible optimal range for shutter speed, aperture, and ISO settings in product photography setting on white background?

I have an e-commerce store where I have to take product photography on a white background and I want to actually have a "standard" set-up for this. I know there is no one right answer to this because ...
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2answers
416 views

Which ISO should I use for the cleanest image? [duplicate]

Assume the case of a Canon 6D Mark II. Its lowest ISO is regulary 100. If expanded, I can set it to L, which is ISO 50. Until now, I was always under the impression the lower the ISO the cleaner the ...
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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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1answer
165 views

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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4answers
2k views

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
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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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342 views

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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1answer
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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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3answers
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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
520 views

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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1answer
222 views

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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1answer
196 views

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 ...