Tagged Questions
4
votes
1answer
169 views
How can I calculate the effect of non-TTL flash on exposure?
I recently got an old Canon AE-1 film camera back in working order. I'd like to use my modern 430EXII Speedlight flash with it, however since there is no TTL metering, I have no idea how much the ...
2
votes
2answers
119 views
Old Flash from the 70's
I have an old Consul 400 flash. It was distributed by Braun North America. I would like to figure what is the GN number at ISO 100, f/4, 10 feet.
2
votes
1answer
322 views
What is the relationship between Guide Number and flash power level?
From this post, I understand that the flash guide number (GN) is given by the following formula:
Guide Number = Shooting Distance × f-number ÷ ISO factor
I'm assuming that the GN calculated via the ...
