Split 2 ISO'S
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Old 1 Week Ago   #1
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Default Split 2 ISO'S

This one I did by setting my ISO to Auto in Program Mode and facing my Grey Card to the window and pressing the Shutter Button Half Way down. This Manual ISO I received- I noted. Then I held the G C to the Shady Side of the face and did the same - noting the ISO. After totalling the ISO's and Splitting the ISO Total in Half, I used the closest ISO to the Half ISO Total for this. (Sadly I did not keep the ISO"S).

Along with that, I set my White Balance - not on White Paper - but on the Grey Side of the Grey Card.
Also, this is "0" Default of a 3 Image Bracket.

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Old 1 Week Ago   #2
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Default Re: Split 2 ISO'S

Averaging the ISO would produce a result somewhere between the higher ISO and half the higher ISO. The most extreme case of a big spread in ISOs, say three or more stops, the result would be almost identical as halving the higher ISO. If the two contributing ISOs were about the same, averaging them would not make that much difference over just choosing one of the nearly identical ISO readings. If the lower ISO is about three-fifths of the higher one or about two-thirds stop below the higher one, the average would be about a third of a stop below the higher ISO.
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Old 1 Week Ago   #3
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Default Re: Split 2 ISO'S

Thanks for the info. I will note it and keep it for reference.
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Old 1 Week Ago   #4
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Default Re: Split 2 ISO'S

Help me understand, because this technique is new to me... why do all this, when you could just shoot one frame of RAW and have God's power over tweaking? Honest question, thanks your your response.

Andrew
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Old 1 Week Ago   #5
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Default Re: Split 2 ISO'S

Andrew

I just aimed a Grey Card in A couple of Directions - found the ISO's - and Divided the total by 2 - as stated above. Then - as above - I just used the closest ISO to the Average ISO I got dividing my ISO's above

I admit I know of, but have not learned, RAW. I have always liked to try different
things - slow as they may be - to see what I can achieve.

In my film days, I always used a Grey Card and Incident Meter - so have just stayed with this system - as close as I can with my digital cams. I find it easier to use for all I need to do.

I do not do any work for money or time limits - so I just stay with my old methods.
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Old 1 Week Ago   #6
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Default Re: Split 2 ISO'S

`

Quote:
Originally Posted by ShutterKlick View Post
Help me understand, because this technique is new
to me... why do all this, when you could just shoot
one frame of RAW ........
Your minor befuddlement is 100% justified. All that work is
toadally unneccesary. But "unneccesary" is NOT at all the
same as "useless". No way !


Breaking a task, a simple task, out into seemingly pointless
extended number of steps is an analytical or learning thing.
Sometimes it "just clicks" and you gain understanding about
something that you had been doing just by rote instruction
without real understanding. Gaining real understanding will
lead to operating more intuitively, makes you more flexible
in how you apply procedures.



`
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Old 1 Week Ago   #7
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Default Re: Split 2 ISO'S

Quote:
Originally Posted by nldunne View Post

Thanks for the info. I will note it and keep it for reference.
Uh huh. The only scales that allow "splitting a difference" by
grade school arithmetic are linear scales and in practice few
scales are that simple. Most are log scales. Frequently, the
deal is to square both numbers, add them, derive the new
root, etc. Basic trig, but not basic arithmetic.

On a linear scale 32 is not the midpoint between 22 and 45
but 32 is the f/stop between f/22 and f/45. In practice not
a huge deal, but small errors sometimes add up ... acoarst
with any luck, small errors can also cancel each other out
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Old 1 Week Ago   #8
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Default Re: Split 2 ISO'S

Norm has been around here a long time, posts every now and then, and does things "differently". Where we look at his experiments and scratch our head at why (like why not just set it to auto-iso and shoot the image instead), Norm has always tried to think at it differently, without using all he tools and/or techniques... none of that experimentation is all bad. He learns, and educates himself, and probably more importantly, he has fun and it is a hobby that satisfies his curiosity. And for that, I'm always found him to be interesting, which is also not bad. Plenty of real weirdos out there that are the opposite side of weird than Norm is...

Plus, him and his wife always struck me in the images as the quintessential "On Golden Pond" couple....
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Old 1 Week Ago   #9
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Default Re: Split 2 ISO'S

Mr. P

My kind and humble thanks for all the kind words you post. They are true and most of all appreciated. Like you state - we too have seen some real "different" people - and their work - on all forums and in other places - not the folks you would find "On Golden Pond" - that is for sure.

I have taken this image - color and b and w - and matched the bottom of Anne's shirt (Darkish Red) as a Dead Ringer to the Red color of clothes in the photo reproduction of paintings in my Painting Exhibition Catalogues. I put my hard copy on top of the Catalogue Image to do this in even light. This is another way I learn how to check my work. I know this is not for everyone - and I accept that too.

Major European Galleries are my second home when we Cross the Atlantic Pond. This is another way that I - learn - albeit differently - from many folks.

Thanks again.
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Old 1 Week Ago   #10
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Default Re: Split 2 ISO'S

Hi Norm, its nice to see you posting again.


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