glasses

Glasses                                             
by Meysam                

Submit your Photo
Hall of Fame


Please participate in Meta
and help us grow.

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.

learn more… | top users | synonyms

0
votes
0answers
28 views

Is the Live View ISO setting only effecive for capturing a picture?

I put the Live View on tripod mode and in Live View by pressing the OK button, I can change the exposure value. But obviously in different light intensities, the EV changes automatically. I have the ...
0
votes
4answers
191 views

Native ISO vs Boost ISO. What kind of amplification corresponds to each of them?

As I understood, there's a native range for ISO in DSLR cameras and a boost mode which is usually a bigger range and contains the native ISO. I'm lost a bit here. Which of the following processes is ...
2
votes
2answers
77 views

Why are some ISO numbers greyed out on my Canon 7D Mark II?

I am only able to select ISO 100, 200, 400, 800, 1600, 3200, 6400, 12800, 16000. Everything else is greyed out. I can't find anything online about it. I find it hard to believe that I am the only one ...
0
votes
2answers
33 views

How does “Unity Gain ISO” differ from Native ISO?

Native iso is "the sensitivity you get without amplifying the analogue signal you get from the sensor". Unity gain ISO is "the ISO of the camera where the A/D converter digitizes 1 electron to 1 data ...
0
votes
3answers
60 views

What ISO setting to use with R72 Filter?

I am experimenting with shooting on infrared film for the first time. I have IR B&W Rollei 400 ISO film, Canon AE-1 camera, 28 mm wide lens, Hoya R72 filter. Would I set my camera to 400 ISO or ...
0
votes
3answers
86 views

What all techniques and best practices I should use or improve for these photos? [closed]

I am beginner in photography. These two photos are taken in manual mode and I feel it's perfect shot. Please have a look and let me what all things I should improve and what I shouldn't consider. ...
1
vote
1answer
85 views

Finding the real settings of my camera

I installed the CHDK firmware on my camera. One of the options it has is to show the "true" ISO that any given displayed ISO represents (eg. display ISO 80 is really ISO 45). This got me wondering: ...
0
votes
2answers
68 views

Does ISO 50 reduce the signal level from CCD/CMOS?

As I know, ISO (in digital photography) is simply a gain power of electronic amplification of an electric signal read from the sensor. Is it guaranteed that minimal ISO setting is just a "minimal ...
1
vote
1answer
59 views

Does MP influence ISO?

I use Sony Nex 6 and I noticed that on not really high ISO (let's say 1600) pictures get discernibly grainy. Also I know that the next's model main feature is larger image size (24MP comparing to 16MP ...
2
votes
1answer
71 views

How can I measure noise from the photo?

With higher ISO comes "bigger" noise. Is there a way to measure how much noise does the photo have? Maybe some programs can calculate it?
0
votes
0answers
21 views

Efficiency of DSLR's CMOS at constant ISO [duplicate]

Does the efficiency of CMOS change if one keeps the ISO constant but changes the exposure time?
1
vote
1answer
230 views

My photos are way too dark, must use 6000+ ISO inside

I have a problem. I recently got a new lens (18-105mm) and my pictures just gets dark. I am shooting in manual mode, I changed to automatic mode without flash and it got lighter. There must be a ...
0
votes
2answers
78 views

When to use the LV formula?

EV = log2(f^2/T) LV = EV + log2(ISO/100) Question is to those that this is already clear. It is not a math question, it is a photography question about using Light Value. My puzzlement is ...
8
votes
1answer
104 views

Who publishes standardized camera specs?

Is there any online resource that provides camera specs that adhere to ISO standards? ISO has published many standards for camera specs: Tonal response ISO 14524:2009: Methods for measuring ...
1
vote
1answer
106 views

Why is my ISO setting changing in manual mode?

I want to use Manual Mode but I don't understand why, when I set my ISO to 100, I see in the picture settings that the ISO changed to 3200. How can I set it up to be what I set and not what the ...
1
vote
2answers
186 views

What could cause very underexposed photos in daylight?

I just recently started toying with the manual mode on my Canon 70D. Everything was working fine for a few shots, then all of a sudden my newer shots all appear darker under the same settings. The ...
4
votes
4answers
468 views

What is the relationship between ISO, aperture, and shutter speed?

I know digital cameras have ISO options, and that ISO is the camera's sensitivity to light, but if you set higher ISO then you can get a noisy image. I also know there are two other camera options, ...
3
votes
2answers
218 views

Can I use chemicals for developing ISO 400 film to develop ISO 100 or 200 film as well?

In my black and white photography class, the teacher recommends us to use ISO 400 to develop our film and make prints. I found that ISO 400 is much too grainy for my liking, and as a result I want to ...
1
vote
0answers
44 views

What does changing the ISO value on a digital camera actually do? [duplicate]

I'm used to film photography, where the ISO value is an indicator of the speed that the chemicals on the film strip react to incident light. For the case of the electronic sensor, what is actually ...
6
votes
1answer
139 views

Why are shutter speed and ISO sometimes shown in strange fractions?

Sometimes, browsing 500px or any other photo site that holds EXIF info, I see some weird shutter and ISO tagging. Some EXIF says that the photo was taken with 80000 or 160000 ISO. Is it relevant to ...
1
vote
2answers
80 views

In my Canon t5, how much can I bring up the ISO without getting unacceptable noise? [closed]

Would you feel comfortable at 3200? Or maybe at 1600?
13
votes
3answers
2k views

If I want to shoot darker shots, is it better to increase the lighting and then darken in post to retain clarity?

I'm just getting started - in my last shoot, I was using a 6D with a 50mm/1.4. In low light, the pictures looked fantastic on the viewfinder but on the computer screen, appeared extremely grainy. ...
0
votes
1answer
99 views

How does ISO setting change CCD/CMOS sensor behavior? [duplicate]

In order to understand the technology in a digital camera, I considered the following question: How does ISO setting change CCD/CMOS sensor behavior? For example, does ISO setting affect the amount ...
1
vote
3answers
268 views

How can I change the ISO value on a Nikon D300S without taking my eye from the viewfinder?

I came from a Canon 450D to Nikon D300S and I have one minor complaint. The Canon allowed me to change all exposure settings while looking through the viewfinder and shooting in manual. In the Nikon, ...
3
votes
2answers
384 views

Does anyone make an ASA 1600 or 3200 color film?

I have never found anything more light sensitive than 800 in color film. Wondering why that is.
3
votes
1answer
461 views

Why are ISO settings not available/grayed out on Nikon 5100 in auto mode?

I have a Nikon 5100 and the option to change the ISO settings on Auto mode isn't available. The option is grayed out and it's stuck on auto. The ability to change ISO setting is only available when ...
2
votes
3answers
169 views

how many stops different are a 100 ISO film stock and an EI 320 film stock, and which is faster

how many stops different are a 100 ISO film stock and an EI320 film stock , and which is faster?
1
vote
2answers
741 views

If I shot Tri-X 400 at ASA 800, should I develop at 800, and can I go all the way to 1200?

I shot 8 rolls of tri-x 400 on an olympus xa-2. I set the asa on the xa-2 to 800, 1 stop over. Should I develop at 800? ie push 1 stop? I would like to develop at maybe 1200, ie push 1.5 stops. ...
2
votes
1answer
96 views

Why are there shiny bits in my night photo?

Fisheye lens, so no UV filter installed that can mirror it. ISO 800, 10s shutter, Canon 40D my guess is in-camera high ISO reduction algorithm gone awry. could be? Edit: I was talking about the bits ...
4
votes
2answers
251 views

Is analog gain really actually power-of-two only?

Context I'm using a Nikon D5200, which features extra ISO values between powers of two, that the Nikon D60 did not offer. D60 offers 100, 200, 400, 800, 1600 (1-stop interval). D5200 offers two ...
2
votes
4answers
1k views

Sony a7: Is there more noise for ISO <100?

I have a Sony a7 (original). And on the camera it has a feature my old Canon DSLRs never had: it allows me to select ISO values LOWER than 100. I understand the point of these lower ISO values: I ...
2
votes
0answers
334 views

Why does my Canon 24-70mm L Lens appear to produce higher noise/grain than my 50mm f/1.4 in similar environments?

I just purchased a brand new 24-70mm f2.8 II for my upcoming trip. I've been testing out this lens for the past few days, and have noticed something that I'm a bit confused by. It seems by my tests, ...
3
votes
6answers
3k views

How can I see the photo settings like f-stop, ISO etc. of a image?

I am new to photography and enjoying shooting with my Nikon D3200 camera. Once I take a photo, is there any tool by Nikon or a third party which can give me info like F-stop, ISO, Shutter speed, etc? ...
1
vote
1answer
95 views

Paper ISO with no filtering

I'm looking at the Fomaspeed VARIANT paper's technical sheet. I want to learn what is the ISO speed of this film (I need this to evaluate the exposure time in a pinhole camera) - and the spec says ...
5
votes
1answer
166 views

Can I get Photographic Paper with lower ISO?

I have been playing around with pinhole cameras using photographic paper (instead of film). Great fun. But when I buy photographic paper, I don't seem to have any options for different ISOs, like I do ...
0
votes
2answers
247 views

How do shutter speed, ISO and aperture work together to control exposure?

When shooting in natural or ambient artificial light (without flash, basically), how do light, shutter speed, ISO and aperture work together to control exposure?
11
votes
3answers
2k views

How can I reduce noise at ISO 100 in photos taken in the twilight?

I shoot with a Canon EOS Rebel T5 and sometimes see noise even when shooting at ISO 100. Is this just because there is not enough light in the dark portions of the picture (seen below)? Is this a ...
0
votes
1answer
73 views

How to shoot the sequence of adjusted exposures wanted for a ColorChecker?

I'm trying to shoot a sequence of photos needed for calibration. As instructed, I'm in manual mode, with fixed ISO 100 (camera dafault), and other values read from the lightmeter ... and now: Can you ...
5
votes
1answer
273 views

What do “dark current” and “sensitivity” mean for a camera module?

I am looking at a camera module to be used for a project which deals in shooting frames in dark areas and night conditions. This is a camera used from a circuit board. I have the following light ...
1
vote
2answers
156 views

System Gain vs ISO [duplicate]

Does the "system gain" (i.e. electrons/ADU) change when one changes the ISO of a digital camera? To put this another way is there an analog amplifier between the sensor and the ADC whose gain is ...
5
votes
1answer
665 views

Why can't I set my Pentax K-5 IIs to ISO 100?

I recently got a K-5 IIs, and found that it can't be adjusted to under ISO 200. Even with expanded ISO mode, 160 is the lowest possible value. Can anyone help me out?
0
votes
2answers
139 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
votes
2answers
328 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 ...
12
votes
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?
0
votes
0answers
57 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
votes
2answers
188 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 ...
26
votes
10answers
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, ...
1
vote
4answers
127 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 ...
-5
votes
3answers
220 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
votes
3answers
1k 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 ...