• Welcome to Photrio!
    Registration is fast and free. Join today to unlock search, see fewer ads, and access all forum features.
    Click here to sign up

Without TTL, how to use a flash to light up an entire room with correct exposure?

Fusion Energy

A
Fusion Energy

  • 2
  • 0
  • 44
The Outhouse

A
The Outhouse

  • 2
  • 2
  • 54

Recent Classifieds

Forum statistics

Threads
203,473
Messages
2,855,307
Members
101,858
Latest member
FreeRanger
Recent bookmarks
0
How was the recycle time?

I presume flash would have fired at full power.

So, you may get good news...let's wait and see.
 
OK, well that's re-assuring, and yes I will post the results when I get them.

As for recycle time - I put brand new batteries in it this morning and it took 4 or 5 seconds to recycle, so I think it was maxing out. I don't recall a beeping sound but that's not to say it didn't make one.
 
However, in my panic, I had the flash set only to f8 - likewise with the lens which was set to f8 @ 1\125th (EV13). According to the dial, the maximum range is about 15 feet and I assume that's head on - I suspect it is more like 10 when bounced (though WillTW above says the flash compensates for that?)?

Whether using TTL or flash photosensor, the flash will simply send light until the camera or photosensor says 'enough light' has come back from the subject. So if direct flash needed 50% of available power, it might need to send 100% of stored power with bounce, before it detects 'enough light'. But if the flash is maxed out with direct light at a certain distance, there is no way you'd ever get the same intensity of illumination at the same distance when using bounce!

Now, all is not lost. Let us assume that with your subject at 15', using bounce the subject is underexposed by -2EV on that side of the face; that side of the face would be -2EV in brightness, but that is a GOOD thing! If f/8 output was available from the flash even with bounce, you'd have somewhat flat lighting that is too uniform across the entire face...not so good for flattering photos!
 
OK, the results are in!

Better than I expected, but not as good I was originally hoping for. Enough as a keeps sake for my friend though!

cnv00004-a.jpg

cnv00010.jpg

But thanks guys - I wouldn't have got this without you all. It is appreciated.
 
Last edited by a moderator:
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab Blue Moon Camera & Machine
Top Bottom