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Iso
Apr 3, 2014 16:07:35 #
it electronically adjusts the signal gain from the sensors - Grain is not the same as pixels. What you are seeing is the result of electronic noise, not pixels. The pixel count does not normally change. In some cameras that do pixel binning, you will see a drop in pixel count, as pairs of pixels are grouped and seen as one, that admits twice the light per location, but at lower resolution. Fuji cameras with EXR processors do this very effectively.
Apr 3, 2014 16:45:50 #
Back in the day I always used 100 or less, 64 for slides. My criteria was how grainy was I prepared to live with.
I've tried some of the faster ISO speeds with the digital stuff now and the same rule seems to apply.
So for me, if I care about a grainy image, which I do especially if the picture will be enlarged, ISO 100 is where I'd default to.
I try to operate using the old axiom of getting the best image quality you can, in the camera, before resorting to darkroom (now PC) adjustments.
I've tried some of the faster ISO speeds with the digital stuff now and the same rule seems to apply.
So for me, if I care about a grainy image, which I do especially if the picture will be enlarged, ISO 100 is where I'd default to.
I try to operate using the old axiom of getting the best image quality you can, in the camera, before resorting to darkroom (now PC) adjustments.
Apr 3, 2014 16:47:05 #
Gene51 wrote:
it electronically adjusts the signal gain from the sensors - Grain is not the same as pixels. What you are seeing is the result of electronic noise, not pixels. The pixel count does not normally change. In some cameras that do pixel binning, you will see a drop in pixel count, as pairs of pixels are grouped and seen as one, that admits twice the light per location, but at lower resolution. Fuji cameras with EXR processors do this very effectively.
Thank you Gene. So its the amplification of the signal from the sensor that changes. Does a high ISO mean greater of less amplification? Also, I have a FUJI camera. Is what you are saying about Fuji cameras a good thing or a bad
thing?
It is really great to have all this knowledge willingly given out to clueless people like me by people like yourself. Thanks again
Apr 3, 2014 16:47:37 #
I routinely shoot ISO 1600 and on occasion, to 3200 with results that are better than I used to get with TriX or HP4. Things have changed.
Apr 3, 2014 16:50:57 #
Frosty - high iso turns the volume way up. Like when you turned up the volume on your stereo, you start to hear noise that you didn't hear before. All sorts of non-musical stuff. The music gets louder, but so does the noise. It's a really rough analogy, but it gives you a better idea of what's going on.
Apr 3, 2014 16:52:34 #
Hi, Normally on cropped sensor 400 ISO set constantly. on FF 250, raising it to 32,000 or whatever I need to get the shot! I always manually set ISO on either camera but noise is always harder to control on 1.6 x sensor .
Apr 3, 2014 16:59:29 #
Well written post nightsky. Good lesson for all photographers using SLR or DSLR.
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Apr 3, 2014 17:10:19 #
The only time I worry about my ISO setting is when I need a really fast shutter-speed. That's it. When I am shooting on a tripod, or sports and need a really fast(stop-action shutter-speed). The higher the ISO setting or more sensitive you set your camera's sensor, and the more noise you are going to have. That's why I shoot at the lowest ISO I can get away with. Especially in low-light. I am shaky when shooting hand-held, so the cut-off point for me is 1/60 of a second. It's a matter of determining how steady you are with how much noise you are willing to put up with.
Apr 3, 2014 17:17:54 #
Gene51 wrote:
Frosty - high iso turns the volume way up. Like when you turned up the volume on your stereo, you start to hear noise that you didn't hear before. All sorts of non-musical stuff. The music gets louder, but so does the noise. It's a really rough analogy, but it gives you a better idea of what's going on.
Great explaination. Thanks--Frosty
Apr 3, 2014 18:47:58 #
Martin wrote:
Do you use auto Iso or manual. I recently switched to auto ISO
since the camera is much smarter than me. Images are coming out much better.
since the camera is much smarter than me. Images are coming out much better.
Manual ISO all the way. I shoot mainly in manual or aperture priority, but I like to control my ISO.
Apr 3, 2014 19:02:36 #
Hi been watching this post with some interest! Go out and spend a day shooting at say 4,000 ISO or whatever? Get rid of that brained washed mentality. You are using an instrument that has a billion pound development budget at the back of it, shoot raw and process in whatever soft ware you use and see how different it looks in shooting compared to shooting in say ISO 100! Granted if you are using a cropped sensor you will see noise more readily but you can process it in PP or other ? If you see noise using a FF sensor bin your camera and buy a proper one!
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Apr 3, 2014 19:23:35 #
big d wrote:
Hi been watching this post with some interest! Go ... (show quote)
Big, I didn't see any smiley faces, does that mean you are actually serious?!
Just wondering since those are some pretty reckless statements to make.
Everybody has their photographic goals, depending on the intended purpose of their shooting.
One mans treasure at ISO 4000 is another mans BIN material.
And there are those that simply don't know the difference. :lol:
I'll assume you were joking.
SS
Apr 3, 2014 19:28:44 #
SharpShooter wrote:
Moss, most of us(MOST, not all), are concerned wit... (show quote)
SharpShooter: I hand hold my camera most of the time and when I'm photographing people (or animals) on the move, changing from one ISO setting to the other does take my attention away from the subject so I can see where Auto ISO would be helpful. Will set that up next time I'm shooting action. It is a better trade off than loosing shutter speed or aperture setting.
Thanks Bobster for your reply, too.
Apr 3, 2014 19:35:54 #
Apr 3, 2014 19:55:54 #
brokeweb wrote:
O.K.N Cali boy... with your smart-ass remarks. What's your solution?
Broke, is that intended for me?? ;-)
If so, I'm glad to respond, when I know what the question was!!
SS
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