Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Read More.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Photography Talk by Genre Glamour & Nude Talk
Thread started 25 Sep 2008 (Thursday) 22:34
Prev/next

Lighting

 
themirage
Senior Member
themirage's Avatar
611 posts
Joined Dec 2005
Marion, Iowa
Sep 30, 2008 23:41 as a reply to post 6413812 |  #16

Okay Bieber, I may have my terminology wrong but I think what I'm trying to say is sound. Below are two images with the same aperture and ISO. The only difference being the shutter speed. You can see that the one with the slower shutter speed lets the light 'spread' far enough to hit the gray paper 8ft back and make it lighter than the other photo.

Faster Shutter Speed

HOSTED PHOTO
please log in to view hosted photos in full size.

Slower Shutter Speed

HOSTED PHOTO
please log in to view hosted photos in full size.

-Michael

Gear List

Designs of Utopiaexternal link
SmugMug Galleryexternal link
˙ǝɹnʇɐuƃıs ʎɯ uı pǝʇsǝɹǝʇuı ʎllɐǝɹ ǝɹɐ noʎ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı

LOG IN TO REPLY
themirage
Senior Member
themirage's Avatar
611 posts
Joined Dec 2005
Marion, Iowa
Sep 30, 2008 23:43 as a reply to themirage's post |  #17

Anyhow here's a pic kind of like those he was trying to create using the same model used above.

HOSTED PHOTO
please log in to view hosted photos in full size.

-Michael

Gear List

Designs of Utopiaexternal link
SmugMug Galleryexternal link
˙ǝɹnʇɐuƃıs ʎɯ uı pǝʇsǝɹǝʇuı ʎllɐǝɹ ǝɹɐ noʎ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı

LOG IN TO REPLY
bieber
Goldmember
bieber's Avatar
1,992 posts
Joined Dec 2006
Bradenton, FL
Oct 01, 2008 06:46 |  #18

That's not the light from the strobe "spreading," that's ambient affecting your exposure. Most of it probably from your strobe's modeling light, which is giving you the impression that the strobe itself is somehow burning in longer.


EOS 20D w/ BG-E2 grip
Nifty fifty, EF 28mm f/2.8, EF 70-200mm f/4L USM
Speedlights SB-25/SB-26/580EX, Pocket Wizards and such
My Galleryexternal link

LOG IN TO REPLY
Mark1
Cream of the Crop
Mark1's Avatar
6,725 posts
Joined Feb 2008
Maryland
Oct 01, 2008 09:42 |  #19

My guess it is something like this....

IMAGE NOT FOUND IMAGE IS A REDIRECT OR MISSING!
http://img258.imagesha​ck.us ...2033/lightingsetuph​j8.jpg (external link)
HTTP response: NOT FOUND | MIME changed to 'image/png'


Big box to soften the light, but far enough away to make it a bit directional again.

www.darkslisemag.com (external link)

LOG IN TO REPLY
themirage
Senior Member
themirage's Avatar
611 posts
Joined Dec 2005
Marion, Iowa
Oct 01, 2008 10:30 |  #20

bieber wrote in post #6415245external link
That's not the light from the strobe "spreading," that's ambient affecting your exposure. Most of it probably from your strobe's modeling light, which is giving you the impression that the strobe itself is somehow burning in longer.

The modeling light is off when the photo is taken. I've tried it again without the modeling lamp, dark room so I had to lock the focus, and the result is the same.

Now that being said, you can reduce the amount of light the spreads out that way by gridding the softbox to keep the direction of the light more focused on the subject.


-Michael

Gear List

Designs of Utopiaexternal link
SmugMug Galleryexternal link
˙ǝɹnʇɐuƃıs ʎɯ uı pǝʇsǝɹǝʇuı ʎllɐǝɹ ǝɹɐ noʎ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı

LOG IN TO REPLY
bieber
Goldmember
bieber's Avatar
1,992 posts
Joined Dec 2006
Bradenton, FL
Oct 01, 2008 10:53 |  #21

themirage wrote in post #6416321external link
The modeling light is off when the photo is taken. I've tried it again without the modeling lamp, dark room so I had to lock the focus, and the result is the same.

Now that being said, you can reduce the amount of light the spreads out that way by gridding the softbox to keep the direction of the light more focused on the subject.

The modeling lamp is off when the strobe goes off, but it should come right back on again afterwards. There is no way for light from a strobe to "spread" over time. It travels at, well, the speed of light, and it's gone its course in a much, much shorter time than even the 1/250 of a second that your shutter is open at the max sync speed. Anything that comes in after that is ambient.


EOS 20D w/ BG-E2 grip
Nifty fifty, EF 28mm f/2.8, EF 70-200mm f/4L USM
Speedlights SB-25/SB-26/580EX, Pocket Wizards and such
My Galleryexternal link

LOG IN TO REPLY
themirage
Senior Member
themirage's Avatar
611 posts
Joined Dec 2005
Marion, Iowa
Oct 01, 2008 12:04 as a reply to bieber's post |  #22

Alright. I'll leave this one alone. I don't think we are going to come to a census on this. I think the Thread Author got his answer.


-Michael

Gear List

Designs of Utopiaexternal link
SmugMug Galleryexternal link
˙ǝɹnʇɐuƃıs ʎɯ uı pǝʇsǝɹǝʇuı ʎllɐǝɹ ǝɹɐ noʎ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı

LOG IN TO REPLY
mdmedicgod
Senior Member
498 posts
Joined Sep 2004
Salisbury, MD
Oct 06, 2008 06:13 as a reply to themirage's post |  #23

The one variable that wasn't asked.. What aperature were you shooting? I can use strobe in the broad daylight and have my subject lit but the background falls to black


Canon 1D Mark II
Canon 20D
Canon 300D
Canon 70-200 F2.8L IS
Canon 24-70 F2.8 L
Canon 50mm F 1.8
Sigma 70-200mm F2.8 EX DG
2 kit lenses MKI and MKII
http://www.fithp.comexternal link

LOG IN TO REPLY

6,248 views & 0 likes for this thread
Lighting
FORUMS Photography Talk by Genre Glamour & Nude Talk

Not a member yet? Click here to register to the forums.
Registered members get all the features: search, following threads, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, settings, view hosted photos, own reviews and more...


AAA

Send feedback to staff    •   Jump to forum...    •   Rules    •   Index    •   New posts    •   RTAT    •   'Best of'    •   Gallery    •   Gear    •   Reviews    •   Polls

COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Privacy policy and cookie usage info.

POWERED BY AMASS 1.4version 1.4
made in Finland
by Pekka Saarinen
for photography-on-the.net
Spent 0.00156 for 7 database queries.
PAGE COMPLETED IN 0.02s
Latest registered member is shimi85
709 guests, 455 members online
Simultaneous users record so far is 6106, that happened on Jun 09, 2016