Why high ISO?
Dec 10, 2017 21:44:32 #
Couldn't let this go without a comment. There's another post this image should have been in, Integrity in Photography.
PhotoKurtz wrote:
High ISO can save the day. 5:00 am one day in June I arrived at an air race to meet with media and hosts. Off to the west was a totally unplanned full moon. No tripod. I braced my 100-400 zoom on the hood of the truck. Shutter speeds were wayyyy to slow to deal with. When I cranked up to 6400, f13 and found 1/400th. (Canon 7D)
Lots of grain, but for the event coffee mug things worked well. #22 is my buddy from the day before.
Lots of grain, but for the event coffee mug things worked well. #22 is my buddy from the day before.
Dec 10, 2017 22:19:00 #
Fotoartist wrote:
Couldn't let this go without a comment. There's another post this image should have been in, Integrity in Photography.
I let it go... Not worth the time.
Dec 11, 2017 15:42:18 #
Fotoartist wrote:
The test shows that the photos are virtually identical as to noise. What is this camera you speak of?
These were taken with a NIkon D810.
Dec 11, 2017 18:54:42 #
Rongnongno wrote:
I am puzzled by the number of folks using high ISO. Why not slow down a bit and use what the base ISO has to offer.... Like incredible dynamic range in some cameras...
Ron, thank you for your post. I've been thinking about this, and based on your post, I went out to experiment in my back yard. I shot a series of pictures at ISO 64 (camera is a D850) with desired shutter speed and aperture, followed by ones with the ISO adjusted to get a 'zero' on exposure. While the ISO 64 images were very underexposed, they proved much better than the higher ISO images after some simple slides in Lightroom. Here is an original after adjusting exposure in LR (original was like a black image) and a 100% crop of the same image.
Dec 11, 2017 19:03:53 #
jkatpc wrote:
Ron, thank you for your post. I've been thinking ... (show quote)
Well, thank you for taking the time to verify.
Dec 12, 2017 08:46:36 #
jkatpc wrote:
Ron, thank you for your post. I've been thinking ... (show quote)
I think it would contribute to the discussion if you posted 3 unaltered shots with EXIF information intact - the “underexposed” shot, the same shot with only the gamma level raised (no curves or other alterations such as contrast, highlights, shadows, etc), and the shot taken with the “correct” exposure, all with exactly the same camera settings except ISO.
Dec 16, 2017 09:08:41 #
Tomcat5133
Loc: Gladwyne PA
This question seems strange to me. We use high ISO when we want a shot or video that
can be shot in lower light situations of any kind. And we know our camera's different interpretations
of different ISOs. Test you camera out at different ISO's and see when the artifacts start coming
in and judge when you do not want that ISO.
The ISOs you can shoot at with some of today's camera's frees us to shoot way more situations.
My Sony a7s II makes some shots look like movie lighting in films.
can be shot in lower light situations of any kind. And we know our camera's different interpretations
of different ISOs. Test you camera out at different ISO's and see when the artifacts start coming
in and judge when you do not want that ISO.
The ISOs you can shoot at with some of today's camera's frees us to shoot way more situations.
My Sony a7s II makes some shots look like movie lighting in films.
Dec 17, 2017 14:12:05 #
I read through this topic a couple of days ago and wanted to experiment, this morning I had a chance to play. The sky is over cast but there is snow all over so, plenty of soft light. Working with that I shot a series of images the first at metered exposure and then 4 more each one a stop faster than the last. One set emphasized the snow the next the darker areas. In both cases I was able to pull up the exposure on the image that was 5 stops under to almost precisely match the histogram on the image that was properly exposed.
I am jazzed! As an old dog with not so steady hands anymore, just knowing that if the situation calls for it I can use faster shutter speeds with out raising the iso(noise) makes me a happy man. It also means smaller apertures are back in play!!
I am jazzed! As an old dog with not so steady hands anymore, just knowing that if the situation calls for it I can use faster shutter speeds with out raising the iso(noise) makes me a happy man. It also means smaller apertures are back in play!!
Dec 17, 2017 14:20:17 #
Rich1939 wrote:
I read through this topic a couple of days ago and... (show quote)
Now using luminosity masks play with the dynamic range.
Dec 17, 2017 14:25:00 #
Rongnongno wrote:
Now using luminosity masks play with the dynamic range.
I'll want more contrasty conditions for my next play day.
Dec 17, 2017 16:37:19 #
Rich1939 wrote:
I read through this topic a couple of days ago and... (show quote)
Off course you can move the histogram in post of the underexposed shot to match that that of the “correctly” exposed shot, but that doesn’t tell you anything about the noise or DR or IQ; and you can just as easily raise the shutter speed along with the ISO rather than “underexposing”. The real question is, does the resulting image look BETTER and have less noise with this technique, ie: does it really buy you anything, especially in bright sunlight? (and is it useful/possible to “chimp” a 5 stop underexposed image?)
Dec 17, 2017 16:42:53 #
TriX wrote:
Off course you can move the histogram in post of t... (show quote)
Whil I pay attention to many of your posts here you are pushing your luck.
IF you have one of the newer camera, you should try and see the difference. The technology has changed dramatically. Do not stay behind with contrived ideas of what is right.
Please note: This works ONLY if the camera uses the newer sensor technology (invariant) and if you shoot raw.
Dec 17, 2017 16:45:01 #
TriX wrote:
Off course you can move the histogram in post of t... (show quote)
Does it look better? NO!
Does it look just as good? YES! And that is the point of the exercise. Gene demonstrated it with his photos, I needed to prove it to myself. Noise ,not apparent
DR, the day didn't lend itself to judge that. IQ, equal.
Try it, you might like it.
Dec 17, 2017 18:20:38 #
Rich1939 wrote:
Does it look better? NO!
Does it look just as good? YES!
Does it look just as good? YES!
So, what is the benefit?
Dec 17, 2017 18:25:57 #
I've asked myself this before. What is the advantage of having ISO invariance?
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