Is Fuji ISO range - a fake ???

Hi,

Few days ago on another forum found a message that whan guy (quite experienced photographer I suppose) in his studio made some test and measurements with different analog and digital cameras and he found that ISO in Fuji S7000 is fake . This guy says that ISO 200 is like ISO 64 in other cameras etc ...

Does anybody of other S7000 users made such tests or heard about this situation ??? .

I know it is difficult to discuss about subject without reading original message , but the problem is it was in Polish - so I'll try to translate it to English and post here in few days ....
--
SebX - Fuji S7000

I do not think so. My s7000's iso 200 match the iso 200 in my vivitar flash fairly good if not perfect. Maybe iso 160 fits better, but definitely not depart to iso 64.

SebX_A60 said:

Hi,

Few days ago on another forum found a message that whan guy (quite
experienced photographer I suppose) in his studio made some test
and measurements with different analog and digital cameras and he
found that ISO in Fuji S7000 is fake . This guy says that ISO 200
is like ISO 64 in other cameras etc ...

Does anybody of other S7000 users made such tests or heard about
this situation ??? .

I know it is difficult to discuss about subject without reading
original message , but the problem is it was in Polish - so I'll
try to translate it to English and post here in few days ....
--
SebX - Fuji S7000

Click to expand...

--
Fuji s7000
vivitar 283

SebX_A60 said:

Hi,

Few days ago on another forum found a message that whan guy (quite
experienced photographer I suppose) in his studio made some test
and measurements with different analog and digital cameras and he
found that ISO in Fuji S7000 is fake . This guy says that ISO 200
is like ISO 64 in other cameras etc ...

Does anybody of other S7000 users made such tests or heard about
this situation ??? .

I know it is difficult to discuss about subject without reading
original message , but the problem is it was in Polish - so I'll
try to translate it to English and post here in few days ....
--
SebX - Fuji S7000

Click to expand...

Don't know about the 7000 but my 602 is about half it's rated iso compared to every thing else I have. Depends how he measured and what metering pattern he used. Presumably he knew enough not to use multi-spot/matrix as that could throw in exposure compensation.

Hi SebX

The Fuji ISO 200 is a middle point between ISO 100 and ISO 200 of the nikon CP5400.
Cheers,
Guilherme

SebX_A60 said:

Does anybody of other S7000 users made such tests or heard about
this situation ??? .

I know it is difficult to discuss about subject without reading
original message , but the problem is it was in Polish - so I'll
try to translate it to English and post here in few days ....
--
SebX - Fuji S7000

Click to expand...

So the subject is interesting i think . I'll try to do translation of this guy's
post ...

In my opinion it is possible that Fuji Film did some "trick" . Before S7000 I
used Canon A60 and for me it is no difference - Fuji's ISO200 vs Canon's
ISO64 ????
One of that guys conclusion was that Fuji's SuperCCD sensor need's higer
ISO than others to reproduce picture in the same why ))
--
SebX - Fuji S7000

I compaired my S602 to my Canon AE-1 and they are very close.

Morris

SebX_A60 said:

Hi,

Few days ago on another forum found a message that whan guy (quite
experienced photographer I suppose) in his studio made some test
and measurements with different analog and digital cameras and he
found that ISO in Fuji S7000 is fake . This guy says that ISO 200
is like ISO 64 in other cameras etc ...

Does anybody of other S7000 users made such tests or heard about
this situation ??? .

I know it is difficult to discuss about subject without reading
original message , but the problem is it was in Polish - so I'll
try to translate it to English and post here in few days ....
--
SebX - Fuji S7000

Click to expand...

--



http://qcpages.qc.edu/~morris/POD

ISO is based on the film itself, you purchase whatever ISO you're after.

Digital ISO is a "closest" to film setting.
There is no actual thing as native digital ISO....you're shooting digital.

There are going to be variations of ISO 100 from "every" digital camera manufacturer, it's up to each company to determine their settings.

Your "Is Fuji ISO range - a fake ???"....is simply a misinformed conclusion.

SebX_A60 said:

Hi,

Few days ago on another forum found a message that whan guy (quite
experienced photographer I suppose) in his studio made some test
and measurements with different analog and digital cameras and he
found that ISO in Fuji S7000 is fake . This guy says that ISO 200
is like ISO 64 in other cameras etc ...

Does anybody of other S7000 users made such tests or heard about
this situation ??? .

I know it is difficult to discuss about subject without reading
original message , but the problem is it was in Polish - so I'll
try to translate it to English and post here in few days ....
--
SebX - Fuji S7000

Click to expand...

Liek Morris, I checked mine in a quick compare with my AE-1 and Gossen light meter and the s7000 was spot on both.

I guess a CCD can vary from one to another.

It is important to verify a lot of settings though, such as metering mode. You almost can't compare two cameras in their matrix or auto modes, since each manufacturer uses a different scene algorithm. You really need to check spot and center-weighted avg or some other mode where the modes are the same. The average mode on the S7000 matched the AE-1 which is also an average-based meter (if I recall).

marc

morris said:

Morris

SebX_A60 said:

Hi,

Few days ago on another forum found a message that whan guy (quite
experienced photographer I suppose) in his studio made some test
and measurements with different analog and digital cameras and he
found that ISO in Fuji S7000 is fake . This guy says that ISO 200
is like ISO 64 in other cameras etc ...

Does anybody of other S7000 users made such tests or heard about
this situation ??? .

I know it is difficult to discuss about subject without reading
original message , but the problem is it was in Polish - so I'll
try to translate it to English and post here in few days ....
--
SebX - Fuji S7000

Click to expand...

--



http://qcpages.qc.edu/~morris/POD

Click to expand...

MarcD said:

Liek Morris, I checked mine in a quick compare with my AE-1 and
Gossen light meter and the s7000 was spot on both.

I guess a CCD can vary from one to another.

It is important to verify a lot of settings though, such as
metering mode. You almost can't compare two cameras in their matrix
or auto modes, since each manufacturer uses a different scene
algorithm. You really need to check spot and center-weighted avg
or some other mode where the modes are the same. The average mode
on the S7000 matched the AE-1 which is also an average-based meter
(if I recall).

marc

Click to expand...

Strange. My 602 checked against a Canon T90, an A1 and a Gossen meter comes up about 1 stop slower. I used a grey card to check, you need to try and eliminate different metering angles.
Which Gossen were you using?

George Brown said:

Digital ISO is a "closest" to film setting.
There is no actual thing as native digital ISO....you're shooting
digital.

Click to expand...

I think this assertion is not quite correct.

ISO 5800 for film defines film ISO and how it should be tested..

but

ISO 12232 defines a single speed metric for digital imaging applications: The ISO speed rating for a digital camera should require the same exposure and aperture settings as the identical speed rating for a film camera. Following ISO 12232, tests are performed using controlled exposure time and operating temperature, and the analysis accounts for contrast amplification (gain), as well as the noise spectrum of the test target, and the noise result for different color channels.

So you see, Virginia, there is a digital ISO. the real question is: which camera manufacturers are testing speed to ISO 12232? Perhaps we should ask them.

George Brown said:

ISO is based on the film itself, you purchase whatever ISO you're
after.

Digital ISO is a "closest" to film setting.
There is no actual thing as native digital ISO....you're shooting
digital.

There are going to be variations of ISO 100 from "every" digital
camera manufacturer, it's up to each company to determine their
settings.

Your "Is Fuji ISO range - a fake ???"....is simply a misinformed
conclusion.

Click to expand...

I don't agree with you !!! ISO is a norm and it should be maitained by all
manufacturers I think . ISO is a reference standard in photography ....

--
SebX - Fuji S7000

HI,

I just make a test with my eos500rebel and my F700 and it work well as the value is the same for all camera.

--
Bests regards
PhilippeM

A little reading may help.......
ISO is a "film" standard, no such thing as "digital ISO" only estimates.

SebX_A60 said:

George Brown said:

ISO is based on the film itself, you purchase whatever ISO you're
after.

Digital ISO is a "closest" to film setting.
There is no actual thing as native digital ISO....you're shooting
digital.

There are going to be variations of ISO 100 from "every" digital
camera manufacturer, it's up to each company to determine their
settings.

Your "Is Fuji ISO range - a fake ???"....is simply a misinformed
conclusion.

Click to expand...

I don't agree with you !!! ISO is a norm and it should be maitained
by all
manufacturers I think . ISO is a reference standard in photography
....

--
SebX - Fuji S7000

Click to expand...

I tried to download the ISO 12232 standard from the ANSI comitties website but it carried a proce tage of $58.00. Anyhow, here is an excerpt from another link that describes the Digital ISO Standard. The entire document can be found at:

http://www.cis.rit.edu/museumSurvey/documents/StandardsReview_tp.PDF

Excerpt:

"ISO 12232, Photography – Electronic still-picture cameras – Determination of ISO speed
This standard specifies a method for assigning exposure index values, ISO speed

ratings, and ISO speed latitude ratings to electronic still-picture cameras, so that they

relate, as much as possible, to current traditional photography standards. ISO speed is

defined in the standard as the numerical value calculated from the exposure provided at

the focal plane of an electronic camera to produce specified camera output signal

characteristics using the methods described in the standard. It should correlate with the

highest exposure index value that provides peak image quality for normal scenes. The

exposure index is defined in the standard as the numerical value that is inversely
proportional to the exposure provided to an image sensor to obtain an image."

Dosn't sound very exacting, only like a loose approximation for what is defined only as "normal" which can be very subjective.

Regards,

Neil

George Brown said:

SebX_A60 said:

George Brown said:

ISO is based on the film itself, you purchase whatever ISO you're
after.

Digital ISO is a "closest" to film setting.
There is no actual thing as native digital ISO....you're shooting
digital.

There are going to be variations of ISO 100 from "every" digital
camera manufacturer, it's up to each company to determine their
settings.

Your "Is Fuji ISO range - a fake ???"....is simply a misinformed
conclusion.

Click to expand...

I don't agree with you !!! ISO is a norm and it should be maitained
by all
manufacturers I think . ISO is a reference standard in photography
....

--
SebX - Fuji S7000

Click to expand...

Click to expand...