SpeedLight interface

Wifi, USB, GPS, Grips, Mics, Ext Power, Lens, Flash

SpeedLight interface

Postby leegong » Fri Apr 19, 2013 5:54 am

Most part of task0x7 (sub_BFC43FCC) is decoded , task0x7 is the interface which controls Speedlight ,
but i just wonder about what could be hacked for Speedlight .
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Re: SpeedLight interface

Postby Simeon » Fri Apr 19, 2013 4:49 pm

Hi speed sync on the lower end models would be neat, if this is just a software controlled functionality.
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Re: SpeedLight interface

Postby leegong » Fri Apr 19, 2013 10:15 pm

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Re: SpeedLight interface

Postby leegong » Mon Apr 22, 2013 12:00 am

Hi , all ,
What's the general principle about how to increase Hi-speed flashing sync ?
Although i could understand most part of Flashing control code in FirmWare , but didn't find how to increase
sync speed yet , do you think that sync speed only depends on how fast curtain opens and close ? if so , i have to
trace sub_functions which control curtain for speed sync .
Best Regards
Leegong
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Re: SpeedLight interface

Postby Simeon » Mon Apr 22, 2013 12:32 am

Hi-speed sync, is a special mode (not present in D5100) where the flash is made to flash at a lower power, but many times, to improve the coverage of the fast shutter. ie at faster speeds the curtain is never fully open, so there needs to be many pops to illuminate the scene across the shutter movement. so at higher model camera A firmware will need to be usertood know where/how this is triggered.
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Re: SpeedLight interface

Postby Fried Crispy » Mon Apr 22, 2013 1:49 am

http://mmorrispictureco.wordpress.com/hi-shutter-speeds-without-synch-speed-tech/

If anyone wanted an illustration of the curtains during different speeds without highs peed synch, these were taken with a D5100 and off camera strobes.

I encountered this by mistake with a customer's shoot.

It's the only real contribution to this project I can make
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Re: SpeedLight interface

Postby leegong » Mon Apr 22, 2013 8:12 am

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Re: SpeedLight interface

Postby leegong » Mon Apr 22, 2013 8:20 am

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Re: SpeedLight interface

Postby Fried Crispy » Mon Apr 22, 2013 5:03 pm

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Re: SpeedLight interface

Postby leegong » Tue Apr 23, 2013 1:53 am

Can not open it :( , even in the wayback machine .
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