Spring 2012

Spring 2012
by ani

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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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3
votes
6answers
312 views

Can photos taken with high ISO be fixed?

Please see the the attach photos. Our wedding photographer shot all of our pictures in shutter priority mode and ISO 6400. They are grainy, poor . Is there ANY way to fix them?
2
votes
2answers
69 views

ISO or EV compensation? what to use

I have a Nikon d7100. I was shooting random shots in my room yesterday evening with my 35mm lens. I notices that if I use ISO 1000 for properly expose the image, due to grains, details of the object I ...
0
votes
1answer
74 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 ...
1
vote
4answers
128 views

Why is ISO counted as part of the exposure triangle?

My understanding of ISO is that it is electronic gain from recorded light in a sensor, ie it doesn't actually change the sensitivity of the sensor (because that is dictated by the quantum efficiency ...
5
votes
2answers
12k views

How do I see settings afterwards on my Nikon D5100?

I am quite new to DSLR photography. What I can't figure out is how to see the settings for the photo after I have taken it. For example, if I take a photo with 1/200, f5,6 and ISO 200. Can I see it ...
-4
votes
2answers
84 views

Sharp DSLR with big dynamic range and low iso noise [closed]

I'm looking for my first DSLR and I want it to be sharp (I mean, 5DsR is really sharp but it has low dynamic range), has high dynamic range (like the D810) and has low iso noise. Canon is the one and ...
0
votes
0answers
37 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 ...
1
vote
4answers
213 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
88 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
36 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 ...
16
votes
4answers
3k views

What exactly is “base ISO” and how do I find what is base ISO on my camera?

If I understood correctly, base ISO is in full stop steps from the lowest possible ISO setting on my camera. For example if the lowest setting on my camera is ISO 100, than the following table would ...
0
votes
3answers
65 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 ...
1
vote
1answer
88 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: ...
1
vote
1answer
108 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 ...
0
votes
3answers
87 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. ...
6
votes
7answers
5k views

Is noise related to shutter speed as well as ISO?

I understand that as I increase ISO, I'll increase the amount of noise in the resulting image. With a constant aperture I can decrease ISO and slow the shutter speed (assume a non-moving subject, ...
4
votes
2answers
197 views

Why does raising ISO make image quality appear lower even though my measurements suggest it shouldn't?

I know this may be rehashing one of the most discussed topics, but I would like to take it a slightly different direction and solicit input. First of all, I am familiar with the electrical ...
1
vote
2answers
71 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
78 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
3answers
274 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, ...
1
vote
1answer
243 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 ...
5
votes
4answers
6k 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 ...
22
votes
7answers
3k views

Is high ISO useful for photography?

I started photography sometime back, and always wondered when is high ISO handy in photography? Also can it be used to get any special effect in pictures? My camera has Max ISO of 800 but I see some ...
0
votes
2answers
80 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 "what ...
8
votes
1answer
107 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 opto-...
1
vote
2answers
210 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
510 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, ...
29
votes
5answers
12k views

What is the difference between digital high ISO noise and film grain?

What is the difference between digital high ISO noise and film grain? Why does one "eat detail" and the other does not?
2
votes
0answers
341 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, ...
1
vote
3answers
9k views

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

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 ...
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. ...
3
votes
2answers
228 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 ...
10
votes
5answers
850 views

Is it possible to use a lower ISO instead of ND filters?

I've seen on the CHDK page, that you can change the ISO values, and put lower ones. Now let's suppose I want to shoot a waterfall in the daytime, and I also want a long exposure time (e.g., 10 seconds)...
54
votes
7answers
7k views

How is ISO implemented in digital cameras?

If I change the ISO settings on my camera, obviously the gain of the system is increased, amplifying the signal from the sensor. What's not clear to me is where the amplification takes place. I see ...
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 ...
28
votes
4answers
4k views

Why can't the ISO level on most digital cameras be set below 80?

Why is it that the ISO level on most digital cameras doesn't seem to go lower than ISO 80? I understand (vaguely) that the sensors adjust the gain in order to achieve the equivalent of a high ISO ...
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 ...
3
votes
2answers
414 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.
0
votes
1answer
107 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 ...
3
votes
1answer
483 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 ...
40
votes
7answers
16k views

What are the advantages and disadvantages of using auto ISO on a DSLR?

What are the advantages and disadvantages of using auto ISO on a DSLR? Using manual ISO obviously gives you more control, but auto ISO may mean that you get "the shot" under quickly changing ...
0
votes
3answers
4k 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 ...
5
votes
1answer
167 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 ...
2
votes
3answers
173 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
771 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 ...
14
votes
1answer
3k 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 ...