Photo untitled by d e a n

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photo:

untitled

photographer:

d e a n add to favorites

section:

+ discussion

categories:

misc.

published:

Wed 4 Aug 2004 20:57

equipment:

digital camera Sony DSC-F828

permanent link:

https://www.photoforum.ru/photo/131635/

comments (15 from 17)

all comments descending

HASSAN V. #1 Wed 4 Aug 2004 21:50

Great at all.

Jacob Lopes #2 Wed 4 Aug 2004 22:14

original presentation
well done

Natalia Norland #3 Wed 4 Aug 2004 22:50

wonderful capture!

Andre #4 Wed 4 Aug 2004 23:18

I like the concept dean, strong context!

Best regards

Andre

Regina Lopes #5 Thu 5 Aug 2004 00:24

Beautiful image.

Sanjin Lopatic #6 Thu 5 Aug 2004 00:33

Nicely done and composed.
Strong contradiction and powerful meaning.

Regards
Sanjin

samo izgleda mi da ima dosta poznate digitalne buke ili to meni zuji u glavi smile

d e a n #7 Thu 5 Aug 2004 00:49

vidim i ja buku, kako da je se rjesim?
thanx man
d

Sanjin Lopatic #11 Thu 5 Aug 2004 09:50

Mislim da ti treba malo bolja oprema za ovakve stvari kao na primjer dobar objektiv 100-400mm ali ima tu jos dosta sitnih zavrzlama na koje treba paziti i racunati.

Causes of Noise

There are a number of sources of noise contamination.

Heat generated might free electrons from the image sensor itself, thus contaminating the "true" photoelectrons. These "thermal electrons" give rise to a form of noise called thermal noise or dark current.

Another type of noise is more akin to the `grain` obtained by using a high ISO film. When we use a higher ISO, we are amplifying the signal we receive from the light photons. Unfortunately, as we amplify the signal, we also amplify the background electrical noise that is present in any electrical system.

In low light, there is not enough light for a proper exposure and the longer we allow the image sensor to collect the weak signal, the more background electrical noise it also collects. In this case the background electrical noise may be higher than the signal.

So why is using a larger image sensor better?

Each photosite itself generates electrical noise that can contaminate its neighbor. In a larger image sensor, the photosites can be physically further apart and thus be less affected by that contamination.

A larger image sensor also means that the photosite can be larger, thus have a larger light gathering capacity. It is therefore able to generate a larger signal to noise ratio.

That is why a digital camera with 6 million pixels crammed into a 1/1.8 in. image sensor has more noise (especially at high ISOs) than a 6MP digital camera using the much larger half-frame image sensor.

d e a n #12 Thu 5 Aug 2004 10:02

thanx man:)
Na ovoj slici, ISO speed je bio 64, a i svjetlo je bilo skroz OK...zato me zacudilo da je ispalo noisy. Objektiv na ovom aparatu ne bi trebao rezultirati u ovakvoj slici .....Naravno, ne moze se porediti sa 100-400, ali ne mislim da je problem u objektivu,
Pozdrav
Dean