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WAHOO 203FE back from overseas With CFV ability now

Hi Isidor,

> The "upgrade" of the 203 or 202 change the electronic in the body. > The bus between back and body is previously used do informe the body > about the iso setting. Then after the "upgrate" the info go to the > other way. ... > The advantage of "E" back dispears with upgrated back !

I believe the interface between the body and the lenses and the body and the back is I2C, with the body being the master. The body simply asks the back and lenses for the ISO/aperture etc. information in a normal situation. I2C can also be used to write information, such as the trigger from the body to the back, and the ISO from the body to the back in the case of the digital upgrade. But, the body is still the I2C master, it just writes insteads of reads.

I'm not sure why they would have made the digital backs require the body to set the ISO, and not simply have the back set the ISO just like the film backs...but if that's the way they did it, IMO it seems silly, but so be it. But I fail to see why they would have had to disable the use of the film backs being able to set the ISO in this upgrade. That sounds like bad engineering on their part. Perhaps there's more to these limitations that meets the eye.

Regards,

Austin
 
I wrote 2 months ago to ask Hasselblad about upgrating. The answer was that an upgrated 203 or 202 body can no more use the "E-type" info advantage after upgrating. They add " but who still use film today ?"

So the iso is set in the body only, the back is the "slave".
 
Austin

These questions to HASSELBLAD engeneers were never answered . So we just have to accept that the modification will enable us to use the CFV back with the 203FE/205FCC and we loose the ISO setting from the magazine . I can live with that . No trouble at all .
 
You do vary the ISO by setting it on the CFV digital back. The back does not communicate the ISO to the camera's meter. You have to program the 203FE meter at the same ISO as the back. They are independent like when using a 500 series film back.

To be sure, I set ISO 200 on the CFV then checked the programed ISO on the 203FE that I had left on ISO 100 ... it was still reading ISO 100.

I then left the 203FE programed to ISO 100, took a meter reading ... then altered the CFV back to ISO 400, but the meter reading stayed the same as at ISO 100.
 
Marc

Yes you are right .

The ISO setting from the E12/E24 magazine switches is lost and the ISO setting is standard set to 100 in the 203FE . But can of course be altered in the camera .
So when using a CFV one has to alter the setting in the camera according to the setting in the CFV or vice versa .

This is what the HASSELBLAD technicians told me last year , but they did not tell me which particular part is replaced or modified .

On the other hand , it is of no interest to me any more , as long as the 203FE works fine with the CFV , as HASSELBLAD promises .
 
I then left the 203FE programed to ISO 100, took a meter reading ... then altered the CFV back to ISO 400, but the meter reading stayed the same as at ISO 100.>

Marc:

Did you do that for exposure compensation or is ISO 100 a default for use with the CFV?

My understanding was that the CFV would be treated the same as using a non E back.

Regards:

Gilbert
 
Hi Marc,

> You do vary the ISO by setting it on the CFV digital back. The back > does not communicate the ISO to the camera's meter. You have to > program the 203FE meter at the same ISO as the back. They are > independent like when using a 500 series film back.

I don’t believe it would have been difficult at all to have it work exactly the same as the E back. Thanks for that clarification.

It sounds to me like the only benefit of the modification is the trigger being added, which is of course a good thing, but I think it’s borderline shameful (and unnecessary) that they removed the ISO capability of the E backs. This might have been an unintended consequence, and they decided not to change it.

Regards,

Austin
 
I was told by a Hasselblad technician that they physically rewire the contacts, it is more than just reprogramming. Since the CFV is on the market I am not looking any more to buy an E12 back.

Ulrik
 
It sounds to me like the only benefit of the modification is the trigger being added, which is of course a good thing, but I think it’s borderline shameful (and unnecessary) that they removed the ISO capability of the E backs. >

Austin:

I agree that losing the handy ISO on the back is disappointing, it has a couple of advantages. The CFV application chart show the 200 series modifications are necessary only to use F lenses.

Is there more?

Regards:

Gilbert
 
Gilbert

The modification of the 203FE/205FCC disables the switch settings from the magazine switches to the camera and sets the ISO setting in the camera to a default of ISO 100 .
This value can of course be changed in the camera , using the setting procedure .
What you have to do is : set the ISO in the CFV BACK and set the same setting in the camera .

I believe , there could have been a way to have the setting of the film magazines still working , but that would have meant a bigger redesign of the 203FE/205FCC electronics .
 
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