Originally posted by fotonow I'm not sure I'm understanding you.... if I'm outdoors and my exposure is f16, 1/800s @ iso100 how is setting the camera to the X setting going to let me sync my strobes at the 1/800s assuming I'm not willing or able to stop down anymore?
This could be like the Classic day at the beach flash issue ..
The 645Z camera will not synch at faster than 1/125 …….at F16 ……and ISO 100……..you probably can't get the background dark enough .
1. Always start with the ambient light first …... what is required to produce the background exposure you want ....starting with 1/125 as your top shutter speed .
2. You will need an ND filter of about 3 stops in order to cut the ambient light down to what you want, i.e., going from ⅛00 to 1/125.
3. The flash exposure is secondary ….its whatever you need to get F16 using ISO 100 …..again assuming you want a perfect flash exposure of the subject requires the use of either a flash meter or TTL Or you can do that by trial and error based on experience.
4, You have two ways to alter the flash exposure …(1) the power setting and (2) the distance between the subject and the flash .
That's my 2 cents.