20D and ISO 3200

I am wondering why Canon made 3200 a special function. Does that make
sense?


--
Mark

Photos, Ideas & Opinions
http://www.marklauter.com

Mr. Mark wrote:
I am wondering why Canon made 3200 a special function. Does that make
sense?

Hi Beach Bum,

My guess is: to make people think about it before using it.
Canon have probably made some compromises to get
such high gain.

-Mike

"Mike Warren" wrote in
message n

I am wondering why Canon made 3200 a special function. Does that make
sense?

Hi Beach Bum,

Hi Mike, small world.

My guess is: to make people think about it before using it.
Canon have probably made some compromises to get
such high gain.

Like a sort of built in disclaimer I guess. FWIW, the noise at 3200 is
about the same as my F717 was at 800. The noise at 1600 is like the 717 at
100.

--
Mark

Photos, Ideas & Opinions
http://www.marklauter.com

"Zed Pobre" wrote in message
...


I am wondering why Canon made 3200 a special function. Does that make
sense?

Yes, because it's the only ISO setting not actually based on analog
gain. It's just ISO1600 with the final RAW values doubled, and the
only time you ever want to use it is when you're shooting straight to
JPG.

If you're shooting to RAW (which the 20D is based around), don't go
above 1600, and just use the EC in the raw converter to get the same
effect with more control.


Ah hah! Thanks for that info. I'll explore RAW in a few weeks.

--
Mark

Photos, Ideas & Opinions
http://www.marklauter.com

Mr. Mark wrote:

I am wondering why Canon made 3200 a special function. Does that
make sense?

Same on the Maxxum 7D, and no it doesn't make sense.

I suspect that on the the Maxxum 5D, it will not be special, just
another setting. (From the way it's described by Minolta v. the way it
was described for the 7D).

Cheers,
Alan


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In message ,
"Mr. Mark" wrote:

I am wondering why Canon made 3200 a special function. Does that make
sense?

They probably don't want people to use it carelessly, and blame the
noise on the camera, so they set it up in such a way as to keep the
"____ for dummies" crowd from using it.

The 20D's ISO 3200 is really its ISO 1600 under-exposed by a stop, with
a stop of highlights thrown away as it doubles the the RAW capture
values. Some offer this as the answer to your question, but the 10D did
not have ISO 1600 hidden, and its ISO 1600 was the same type of thing
(800 pushed to 1600), so that can't be the real explanation.
--


John P Sheehy

In message ,
"Mr. Mark" wrote:

Like a sort of built in disclaimer I guess. FWIW, the noise at 3200 is
about the same as my F717 was at 800. The noise at 1600 is like the 717 at
100.

I have the 20D and F707, which has the same sensor as the F717, and I'd
say the 20D's 1600 is about as noisy as the F707 would be if it had an
ISO 250.
--


John P Sheehy

In message ,
Zed Pobre wrote:


Mr. Mark wrote:

I am wondering why Canon made 3200 a special function. Does that make
sense?

Yes, because it's the only ISO setting not actually based on analog
gain.

I dopn't think that's the reason, though, as the 10D's 1600 isn't
hidden, and is pushed 800.

It's just ISO1600 with the final RAW values doubled, and the
only time you ever want to use it is when you're shooting straight to
JPG.

Another possibility is that you've decided that you want to shoot with a
fixed EI setting of 12,800, which is only possible with 3200 and -2 EC.
It keeps the flash exposure scaled properly as well.
--


John P Sheehy

Like a sort of built in disclaimer I guess. FWIW, the noise at 3200 is
about the same as my F717 was at 800. The noise at 1600 is like the 717
at
100.

I have the 20D and F707, which has the same sensor as the F717, and I'd
say the 20D's 1600 is about as noisy as the F707 would be if it had an
ISO 250.

It's probably one of those YMMV things. I had a lot of trouble with the
717 - 4 times to the warranty repair shop for major failures. I think mine
was made on Monday.

--
Mark

Photos, Ideas & Opinions
http://www.marklauter.com

Yes, because it's the only ISO setting not actually based on analog
gain.

I dopn't think that's the reason, though, as the 10D's 1600 isn't
hidden, and is pushed 800.

When you say pushed you mean via on-camera software, right? I guess it's
time for me to read up on exactly how sensors emulate specific ISOs.
--
Mark

Photos, Ideas & Opinions
http://www.marklauter.com