-----Ursprungligt meddelande-----
Från: John Hermanson <omtech@xxxxxxxxx>
Till: olympus@xxxxxxxxxxxxxxx <olympus@xxxxxxxxxxxxxxx>
Datum: den 7 mars 1998 18:01
Ämne: Re: [OM] OTF in IS-3?
>Per Nordenberg wrote:
>
>> -----Ursprungligt meddelande-----
>> Från: John Hermanson <omtech@xxxxxxxxx>
>> Till: olympus@xxxxxxxxxxxxxxx <olympus@xxxxxxxxxxxxxxx>
>> Datum: den 1 mars 1998 22:41
>> Ämne: Re: [OM] OTF in IS-3?
>>
>>>At a factory set combination of asa-distance the camera switches between
>>>top flash tube (low power) and >>>bottom flash tube (higher power.) There
>>>is no otf flash control or cell to read flash exposure as in a regular
>>>>>>auto flash (thyristor).
>>>The IS-3 will set f stop with flash based on distance but also which flash
>>>tube is going off., but that is the >>>only control it has.
>> >
>> >John
>> >Camtech
>> >
>> When the built-in GN28 flash and the optional G40 flash are used together
>> the G40 fires full emission, but the built-in GN28 flash is compensated by
>> -3EV. I know what exposure values means, but what exactly does this mean? It
>> can´t be that compensation is by aperture value, because that would effect
>> the G40 as well. Is just the upper GN20 tube fired in this situation?
>>
>My experience with the G40 is limited. But based on your letter, it sounds
>like that the built in flash automatically underexposes by 3 stops when the
>G40 is used.
>
Thanks John. Isn´t there anyone else out there with IS-3/G40 experience that
can elaborate on this? How can the built-in GN28 flash underexpose 3 stops and
not the G40, ie. without reducing the output?
Best regards,
Per Nordenberg
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