DPReview.com is closing April 10th - Find out more

Anyone using this flash? SAMSUNG NX SEF-20A FLASH

Started Apr 23, 2012 | Discussions thread
NewForce Senior Member • Posts: 1,263
Re: SEF-20A

Oh i see ISO200.

I did thinking of the 30mm lens, but then if you are on ISO100, so 20mm lens. So with the 30mm lens your shooting position should have been pushing back by some distance. So if you don't mind, below just for fun calculation and to prevent my brain go more rusty,

  1. SEF20A bounce flash return 50% = GN10. ISO200 mean GN10 x 1.41 = GN14
  2. Shooting distance now 2.3/2.5/3.1m, at 2x distance, 4.6/5.0/6.2m.
  3. GN14 / 4.6/5.0/6.2m = F3.0/F2.8,/F2.25

So again estimated GN vs distance come close to your aperture use. If you happened to be shooting at longer distance, like 3.0m then, GN20x50%xISO200 = GN14/6.2m = F2.25. With F2.8, +0.7EV FEV was needed. More flash calculation practices mean better results.

I too got an eye on Sony DSLR before. But due my horror experience with NEX-5N, I have dropped the idea. Should be fun using a Sony DSLR, if don't mind about the weight.

-- hide signature --

Kenny

Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow