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

 
FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 11 Aug 2008 (Monday) 12:14
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

how to auto focus in dark situation

 
psxindo
Senior Member
419 posts
Joined Mar 2007
Location: So Cal
     
Aug 11, 2008 12:14 |  #1

I'm using off camera flash 580ex II with V2 trigger.
My camera is the 30D.

What is the best method of focusing?

The 30D doesn't have an AF assist beam???
I think it uses the built in flash for the assist beam and the light in front of the camera is for red-eye reduction, am I right???

Can the 580ex II on a cactus trigger emit an AF assist light?

I had a shoot a couple of weeks ago in a dark parking garage and I was really really having a hard time auto focusing. I had to do manual focus. But with a f2.8, I had to be dead on, I kind of missed the focus because of it.
I did try to hold a small flash light on one hand and the camera on the other, not easy to do.

just a rant, my friends cheaper Nikon d40 have an assist beam while using off camera flash with v2 trigger.


5D mkIII | 5D mkII | 6D | EOS M | 16-35L | 24-70L | 70-200L 2.8 IS mkII | EF-M 22 | 50 1.4 | 85L | 100 2.8 macro | Tamron 17-50 2.8 | 2x 580 ex II | 580 ex | 2x sunpak 383 | 134GB CF |
Wishlist | 14L | 24L | 35L | 50L | 100L macro | 135L | 15 2.8 FE | 17L 4 TS | 45 2.8 TS | 90 2.8 TS |

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
jgogums
Senior Member
729 posts
Joined Jan 2007
     
Aug 11, 2008 12:27 |  #2

The 580exII has an assist beam.

Check to see that Cfn 5 on your 30D is set to "0" which means the flash is enabled to fire the assist beam.

Also, check Cfn 8 on your 580exII and make sure that is set to "0" (the default) as that also controls the use of the assist beam.




  
  LOG IN TO REPLY
mattograph
"God bless the new meds"
Avatar
7,693 posts
Joined Jan 2008
Location: Louisville, KY
     
Aug 11, 2008 12:31 |  #3

hmmm...


This space for rent.

  
  LOG IN TO REPLY
Titus213
Cream of the Crop
Avatar
19,401 posts
Gallery: 4 photos
Likes: 33
Joined Feb 2005
Location: Kalama, WA USA
     
Aug 11, 2008 12:57 |  #4

All that being said, I'm not sure your 580EXII will emit a focus assist when mounted off camera with a radio trigger.....


Dave
Perspiring photographer.
Visit NorwoodPhotos.comexternal link

  
  LOG IN TO REPLY
cytime
Member
42 posts
Joined Mar 2007
     
Aug 11, 2008 13:55 |  #5

I also hear a laser light pen is perfect just don't point at anyones eyes....




  
  LOG IN TO REPLY
psxindo
THREAD ­ STARTER
Senior Member
419 posts
Joined Mar 2007
Location: So Cal
     
Aug 11, 2008 15:44 |  #6

thanks for the help...

Yes, the 580ex II does have AF assist beam when mounted on camera, but when it's off, it doesn't emits it....
Is there a way to emit the AF with the radio trigger??


5D mkIII | 5D mkII | 6D | EOS M | 16-35L | 24-70L | 70-200L 2.8 IS mkII | EF-M 22 | 50 1.4 | 85L | 100 2.8 macro | Tamron 17-50 2.8 | 2x 580 ex II | 580 ex | 2x sunpak 383 | 134GB CF |
Wishlist | 14L | 24L | 35L | 50L | 100L macro | 135L | 15 2.8 FE | 17L 4 TS | 45 2.8 TS | 90 2.8 TS |

  
  LOG IN TO REPLY
TMR ­ Design
Cream of the Crop
Avatar
23,883 posts
Likes: 11
Joined Feb 2006
Location: Huntington Station, NY
     
Aug 11, 2008 15:50 as a reply to  @ psxindo's post |  #7

I find that in low light the AF focus assist on Speedlight's isn't satisfactory. What I mean is that the AF works best with greater contrast and although you can get the camera to AF in low light with the AF assist beam, adding a small spot of light or some form of 'modeling light' really helps to tighten up the AF.


Robert
RobertMitchellPhotogra​phy (external link)

  
  LOG IN TO REPLY
evorgsumaf
Senior Member
Avatar
932 posts
Joined Jun 2007
Location: In Great Falls MT
     
Aug 14, 2008 14:30 |  #8

I learned this from the Strobist.com (David Hobby) DVD's. He used a little LED flash light that he actually temporarily attached to his lens. I know it sounds crazy, but when you see how he has done it, and how great it works, it just makes sense.

I don't think this is the same one he uses, but it should work:
http://www.walmart.com …ct.do?product_i​d=10196618 (external link)


Brandon

  
  LOG IN TO REPLY
240dreams
Member
116 posts
Joined Jan 2006
Location: Woodbridge, VA
     
Aug 14, 2008 14:37 |  #9

I shot a car last week with off camera 383's. Of course, auto focus was non existent in the dark situation. I used a flash light to light my focus point and to set it with the camera (40d on center point focus). Then I turned the light off, recomposed, and fired my shot. Pretty much the same method that a few members have already mentioned.

When shooting people in low light, I sometimes tell someone to turn on their cell phone so I can focus on it.




  
  LOG IN TO REPLY
msowsun
Cream of the Crop
Avatar
9,238 posts
Gallery: 14 photos
Best ofs: 1
Likes: 268
Joined Jul 2007
Location: Oakville Ont. Canada
     
Aug 14, 2008 14:50 |  #10

The 580EX II (or any EX) will emit the AF assist beam off camera if used with the OC-E3 off camera shoe cord. It is relatively easy to extend the cord as long as you like. https://photography-on-the.net/forum/showthre​ad.php?t=123662

If you don't like doing it yourself, you can buy an extended cord here:
.......http://www.paramountco​rds.com/products.asp?c​at=93 (external link)

OR ......
http://michaelbass.blo​gspot.com …accessories.htm​l#StartOCC (external link)

IMAGE: http://www.paramountcords.com/images/asppages/ttlstrgt.jpg

Mike Sowsun / S110 / SL1 / 80D / EF-S 24mm STM / EF-S 10-18mm STM / EF-S 18-55mm STM / EF-S 15-85mm USM / EF-S 18-135mm USM / EF-S 55-250mm STM / 5D3 / Samyang 14mm 2.8 / EF 40mm 2.8 STM / EF 50mm 1.8 STM / EF 100mm 2.0 USM / EF 100mm 2.8 USM Macro / EF 24-105mm IS / EF 70-200mm 2.8L IS Mk II / EF 1.4x II
Full Current and Previously Owned Gear List over 40 years Flickr Photostream (external link)

  
  LOG IN TO REPLY
tim
Light Bringer
Avatar
50,981 posts
Likes: 358
Joined Nov 2004
Location: Wellington, New Zealand
     
Aug 14, 2008 18:09 |  #11

40D has much better AF than the 30D. The speedlites have an AF assist beam that helps a bit if the range isn't too far, it only works in one shot mode.


Professional wedding photographer, solution architect and general technical guy with multiple Amazon Web Services certifications.
Read all my FAQs (wedding, printing, lighting, books, etc)

  
  LOG IN TO REPLY
queenbee288
Cream of the Crop
Avatar
5,610 posts
Gallery: 17 photos
Likes: 154
Joined Dec 2004
Location: Stanford, Ky
     
Aug 15, 2008 07:33 |  #12

35L and 40D. I could not believe it. see herehttps://photography-on-the.net …hp?t=545301&hig​hlight=35L




  
  LOG IN TO REPLY
BluewookieJim
Goldmember
Avatar
1,095 posts
Joined Mar 2008
Location: Southern CT
     
Aug 15, 2008 08:32 |  #13

I was shooting some spiders in my back yard around midnight last night. The AF assist on my 580exII wasn't quite cutting it, so I just grabbed my little handheld flashlight, illuminated the subject, manually focused, and there it was, follow the link below to see the results.

That was my first time shooting that way, now I'll be much more prepared for next time.

http://photos.kodanja.​net/p892253147/ (external link)

All shots, 20D, 100mm macro, 580exII, tripod mounted, shutter release.


My Gear and Stuff :: My Zenfolio Gallery (external link) :: My Flickr (external link) :: http://photos.kodanja.​net (external link)

  
  LOG IN TO REPLY
Joe ­ Cyr
Senior Member
Avatar
979 posts
Likes: 8
Joined Mar 2006
Location: Northern Maine
     
Aug 15, 2008 08:52 |  #14

When in doubt or camera is struggling... manual focus.


Canon 1D (MARK III),
10d, Elan IIE (old school), 580exII
70-200 f/2.8L, 17-40 f/4L, 85 1.8, 50 1.8 (nifty)
http://josephcyrphotog​raphy.smugmug.com (external link)

  
  LOG IN TO REPLY
blssdwlf
Senior Member
543 posts
Joined Jun 2007
Location: Houston, TX
     
Aug 15, 2008 13:43 |  #15

I've used a laser pointer and line leveler with great effect in pitch black. A flashlight will work in a pinch.

I've been eyeing this laser + light combo with pressure trigger (external link) to have it as a simple mount.


Regards,
Peter
--= gear: 400D / 17-50 / 55-250 / nifty-50 / flash / etc =--

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

2,422 views & 0 likes for this thread
how to auto focus in dark situation
FORUMS General Gear Talk Flash and Studio Lighting 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


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


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is armychemical
591 guests, 203 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.