Does flash have more exposure in manual than in auto?

Started Mar 17, 2013 | Discussions thread
seachicken2000 Veteran Member • Posts: 3,214
Re: Does flash have more exposure in manual than in auto?

dpyy wrote:

Do you know where I can read more about this fixed and variable power setting? It seems odd to me that they would build the flash in such a way that the camera has more power than the user?

I'm not sure if the TTL flash system for the NEX is well documented.

1/128 power is quite a lot of manual control for a flash. I guess you could control it further by blocking the light from it with some card or an ND filter.

1/128 is 7 stops dimmer than full power, so if you added an 7-stop ND filter, you could have full-1/128 without the filter, and 1/128-1/16384 power with the filter. That should be more then enough control.

With auto flash when you make the exposure, the flash sends out 2 pulses. The first is a measurement pulse that determines the exposure; the second pulse makes the exposure. I am guessing from your first post that the TTL system can reduce the power below 1/128 if necessary.

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