Wallpaper i made of my car, nothing fancy, 1024 X 768
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Joined: Aug 2002
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From: Harris County, South East Texas
Just a nite shot i did, experimenting with ISO. This was taken with no flash, and a "bug lite" in the garage. ISO 400, i think, can't remember. I'll take more when the weather gets nicer.
Using the ISO at 400 was a mistake. That's the reason there's so much "noise" in the picture. The higher you make the ISO setting, the grainier the pic will get, and the image quality will also degrade, as you can see. Try again at ISO50 and the pic will be a lot cleaner.
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if you were being serious ISO stands for International Standards Organization, Its basically what was stated above by ebelp when u have a regular camera using film the ISO number determines how sensitive the film is to light, the higher the number the more sensitive it is. You would want a high ISO number if you were taking a picture of a car on the highway or your gf undressing, you would want a low number if you were taking a landscape shot and wanted have a longer exposure.
I dont really know how comparable a digital cameras interpertation of ISO numbers is compared to film, but i will have to take my digi out and mess around with it someday when i get time !
I dont really know how comparable a digital cameras interpertation of ISO numbers is compared to film, but i will have to take my digi out and mess around with it someday when i get time !
From http://www.dpreview.com:
"In traditional film photography the ISO (ASA) value of a film represents the film's sensitivity. A film with a lower ISO (eg. 25) requires more light to create the same image than a film with a higher ISO (eg. 800), therefore higher ISO films are suited to taking high speed (or low light) photographs. Faster films tend to be more grainy with poorer colour response than slower films. Most people typically use ISO 100 or 200 (sometimes referred to as cloudy) film.
In a digital camera the sensitivity depends on the sensor (CCD/CMOS device) which, compared to film sensors are relatively "slow" devices with an optimum sensitivity of about ISO 100. In a traditional camera you put in a film of a particular sensitivity and you're then stuck with it until you finish the roll (you can change the roll in the case of APS). On modern digital cameras you can select the ISO sensitivity on the fly. This ability to quickly switch sensitivity is another attraction of digital cameras.
Unfortunately, there is a price to pay for this flexibility. A CCD is an analogue device, this means it outputs a certain voltage (normally VERY small) for a certain amount of light which is subsequently digitised by the analogue to digital converter, when you increase the sensitivity you're really just turning up the amplification of this signal (like the volume control on a stereo amplifier), the trade off is that you also amplify the "dark current" (noise) and so higher ISO images from digital cameras often exhibit noise.
Some recently advancements in sensor technology have improved the situation with many higher end digital cameras capable of sensitivity above ISO 400 without impacting on image quality too greatly."
"In traditional film photography the ISO (ASA) value of a film represents the film's sensitivity. A film with a lower ISO (eg. 25) requires more light to create the same image than a film with a higher ISO (eg. 800), therefore higher ISO films are suited to taking high speed (or low light) photographs. Faster films tend to be more grainy with poorer colour response than slower films. Most people typically use ISO 100 or 200 (sometimes referred to as cloudy) film.
In a digital camera the sensitivity depends on the sensor (CCD/CMOS device) which, compared to film sensors are relatively "slow" devices with an optimum sensitivity of about ISO 100. In a traditional camera you put in a film of a particular sensitivity and you're then stuck with it until you finish the roll (you can change the roll in the case of APS). On modern digital cameras you can select the ISO sensitivity on the fly. This ability to quickly switch sensitivity is another attraction of digital cameras.
Unfortunately, there is a price to pay for this flexibility. A CCD is an analogue device, this means it outputs a certain voltage (normally VERY small) for a certain amount of light which is subsequently digitised by the analogue to digital converter, when you increase the sensitivity you're really just turning up the amplification of this signal (like the volume control on a stereo amplifier), the trade off is that you also amplify the "dark current" (noise) and so higher ISO images from digital cameras often exhibit noise.
Some recently advancements in sensor technology have improved the situation with many higher end digital cameras capable of sensitivity above ISO 400 without impacting on image quality too greatly."
With the photography, you're better off sitting it on a tripod, then using a slower shutter speed.
But about the camera.... for ISO 400 thats pretty damn ******* clean. My camera produces a shitload more noise at ISO 400 and i have to work my **** off to clean it in photoshop.
I only use ISO 400 when i have to, saves me alot of work in the digital darkroom later on.
But about the camera.... for ISO 400 thats pretty damn ******* clean. My camera produces a shitload more noise at ISO 400 and i have to work my **** off to clean it in photoshop.
I only use ISO 400 when i have to, saves me alot of work in the digital darkroom later on.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 14eight »</TD></TR><TR><TD CLASS="quote">oh and here is the car w/ the requested changes,
</TD></TR></TABLE>
Should clean up all the other stuff in the background too.
</TD></TR></TABLE>Should clean up all the other stuff in the background too.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ebelp »</TD></TR><TR><TD CLASS="quote">
Should clean up all the other stuff in the background too.</TD></TR></TABLE>
u got it boss!!
Should clean up all the other stuff in the background too.</TD></TR></TABLE>
u got it boss!!
Thread Starter
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Joined: Aug 2002
Posts: 601
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From: Harris County, South East Texas
Thanks a lot! That revised one looks pretty good.
My camera has the option for noise reduction, which i should have also used, but i forgot. I'm still learning.
My camera has the option for noise reduction, which i should have also used, but i forgot. I'm still learning.
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