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 Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras
Thread started 04 Nov 2009 (Wednesday) 07:46
Prev/next
sponsored links
(this ad will go away when you log in as registered member)

7D fill flash photo overexposed?

 
Loke88
Hatchling
1 post
Joined Oct 2009
Nov 04, 2009 07:46 |  #1

I just upgraded from DigitalRebel XT to 7D. My old digitalRebel works flawlessly with the 420ex flash when I am shooting macro. I usually shoot in AV mode use the 420ex for fill flash. I seldom need to adjust FEC as the subject is always lighted up correctly.

However, the same cannot be said for the 7D when pairing up with the 420EX. The macro subject seems to always overexpose and I always need to manually reduce the flash out put to -2/3 or more. See picture below. I tried auto focus but the results are the same. Help is appreciated.

Setting:
Firmware: Firmware Version 1.0.9
Shutter speed: 1/100 sec
Aperture: 7.1
Exposure mode: Av
Flash: External E-TTL
Flash EF guide number: 2047.97
Metering mode: Evaluative
Drive mode: Single frame shooting
ISO: 1600
Lens: 90 mm
Focal length: 90.0 mm
AF mode: Manual Focus
White balance: Auto

IMAGE NOT FOUND IMAGE IS A REDIRECT OR MISSING!
HTTP response: 404 | MIME changed to 'image/gif' | Byte size: ZERO



A sample output when a FEC -2/3 is used:
Setting:
Firmware: Firmware Version 1.0.9
Shutter speed: 1/80 sec
Aperture: 7.1
Exposure mode: Av
Flash: External E-TTL
Flash EF guide number: 2047.97
Flash exposure compensation: -2/3
Metering mode: Evaluative
Drive mode: Single frame shooting
ISO: 1250
Lens: 90 mm
Focal length: 90.0 mm
AF mode: Manual Focus
White balance: Auto
IMAGE: http://i462.photobucket.com/albums/qq342/pfloke/temp/IMG_5581.jpg?t=1257342129



LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as registered member)
egordon99
Cream of the Crop
10,247 posts
Joined Feb 2008
Philly 'burbs
Nov 04, 2009 09:36 |  #2

It's VERY possible that at f/7.1, ISO1600 at such a close range, the flash at it's minimum power setting is STILL too strong. Try a similar shot but put your flash into M and it's minium power (1/64 or 1/128 probably) and see what you get. You might need to use a lower ISO.

I bet that there is nothing wrong with your 7D and that this is operator error.

Setting:
Firmware: Firmware Version 1.0.9
Shutter speed: 1/100 sec
Aperture: 7.1
Exposure mode: Av
Flash: External E-TTL
Flash EF guide number: 2047.97
Metering mode: Evaluative
Drive mode: Single frame shooting
ISO: 1600
Lens: 90 mm
Focal length: 90.0 mm
AF mode: Manual Focus
White balance: Auto




LOG IN TO REPLY
krb
Cream of the Crop
krb's Avatar
8,818 posts
Joined Jun 2008
Where southern efficiency and northern charm come together
Nov 04, 2009 09:44 |  #3

You may want to experiment with a different metering method.


-- Ken
Comment and critique is always appreciated!
Flickrexternal link
Gear list

LOG IN TO REPLY
TheBigDog
Goldmember
Joined Jul 2009
Sicklerville, NJ, USA
Nov 04, 2009 12:54 |  #4

oddly enough I experienced the same happenings with my 420 when I purchased my T1i a couple of months ago. I have since gone to the 580EXII and haven't had any overblown issues since. I'm not saying it's something that could have been corrected with the 420, but I had the money and the 580 seemed like a wise investment for me.


Chris
http://www.cegphotogra​phy.com/ (external link)
Flickr (external link) * Facebook (external link)
Nikon D5 * D810 * 24-70 f/2.8 * Sigma 50mm f/1.4 Art * 105mm f/2.8 * 70-200 f/2.8 * 80-400mm * Sigma Sport 150-600mm

LOG IN TO REPLY
CyberDyneSystems
Admin (type T-2000)
CyberDyneSystems's Avatar
48,029 posts
Gallery: 78 photos
Joined Apr 2003
Rhode Island USA
Nov 04, 2009 13:01 |  #5

I've never owned two cameras that metered exactly alike.. (be it flash or otherwise)
If we get too used to one, we then compare all others to it, and see the differences as a defect.

I'm pretty sure I posted a thread similar to this one back in 2003/04 when I first noticed that my new camera was metering significantly differently from my comfortable 10D.. after half a dozen bodies or more now I never expect anything to be the same.


GEAR LIST
CDS' HOT LINKS
Jake Hegnauer Photography (external link)

LOG IN TO REPLY
backslash
Member
68 posts
Joined Aug 2008
Nov 05, 2009 08:16 |  #6

egordon99 wrote in post #8952882external link
It's VERY possible that at f/7.1, ISO1600 at such a close range, the flash at it's minimum power setting is STILL too strong.

Well, but dialing in FEC -2/3 can provide less power???


galleryexternal link - flickrexternal link - gearexternal linkhttp://www.geavity.com​/people/backslash/external link

LOG IN TO REPLY
backslash
Member
68 posts
Joined Aug 2008
Nov 05, 2009 08:16 |  #7

Would be interesting, if it's still a problem with firmware 1.1.0 .


galleryexternal link - flickrexternal link - gearexternal linkhttp://www.geavity.com​/people/backslash/external link

LOG IN TO REPLY
egordon99
Cream of the Crop
10,247 posts
Joined Feb 2008
Philly 'burbs
Nov 05, 2009 08:27 |  #8

backslash wrote in post #8958833external link
Well, but dialing in FEC -2/3 can provide less power???

Not if you're already at the flash's minimum power :D

Note that the -2/3 FEC shot used ISO1250, and the 0 FEC used ISO1600.

It would be nice to hear back from the OP. I still think trying to shoot that close with a hotshoe flash at ISO1600 might be asking for trouble.




LOG IN TO REPLY
yogestee
"my posts can be a little colourful"
yogestee's Avatar
13,845 posts
Gallery: 5 photos
Joined Dec 2007
Australia
Nov 05, 2009 09:26 |  #9

egordon99 wrote in post #8952882external link
I bet that there is nothing wrong with your 7D and that this is operator error.

Could be.. Looking at your EXIF it appears you could be overexposing anyway..

When using flash of any kind always use manual exposure mode.. When using fill flash take a meter reading off the subject then adjust your FEC to around -1 1/2 to -2 stops under,,depending on subject to camera distance.. The available light is your main exposure,, the fill flash is there to give the subject some lift or reduce unwanted shadows,,fill flash should never dominate.. In fact it shouldn't even be noticable..

As Gordon said,,user error..


Jurgen
50D~700D~EOS M~G11~S95~GoPro Hero4 Silver
http://www.pbase.com/j​urgentreue (external link)
The Title Fairy,, off with her head!!

LOG IN TO REPLY
griptape
Goldmember
2,037 posts
Joined Feb 2007
Home
Nov 05, 2009 13:36 |  #10

I think your ISO is a little bit ridiculously high for this type of shot using flash. That's the glaring issue I see.




LOG IN TO REPLY
apersson850
Cream of the Crop
apersson850's Avatar
11,708 posts
Joined Nov 2007
Traryd, Sweden
Nov 05, 2009 16:11 as a reply to griptape's post |  #11

ISO seems too high.
In E-TTL the flash can emit less power than what you can set it to manually.
As far as I can understand, we are here talking about the flash on the camera. Even as happy to overexpose as my 7D have been, it doesn't do that with the flash in the hotshoe.


Anders

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

4,687 views & 0 likes for this thread
7D fill flash photo overexposed?
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras


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 0.00949 for 4 database queries.
PAGE COMPLETED IN 0.03s
Latest registered member was a spammer, and banned as such!
840 guests, 289 members online
Simultaneous users record so far is 6430, that happened on Dec 03, 2017