Free Shipping on ALL Products
camera reviewsbest cameraslens reviewsphotography tipscamera forumvideo toursphotography bookssupport me
It is currently Wed Dec 17, 2014 8:16 pm

All times are UTC




Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Tue Oct 07, 2008 8:07 pm 
I've noticed that if I use my Sigma 28-200 mm lens, the pop-up flash on my Sony A200 becomes a lot less effective. With the kit lens, the flash successfully illuminates subjects 3 - 4 metres away. When I'm using the Sigma 28-200 mm lens, the effective range of the flash drops to < 1 metre.

I've made sure that the Sigma is at 28mm, I've opened the aperture to f/3.5, I've set flash compensation to +1.0/+1.5/+2.0, I've changed the ISO, and none of these have any effect at all.

Can anyone shed any light? (pardon the pun!) I would really love to keep the 28-200mm lens on my camera all the time. Right now, I have no choice but to swap to the 18-70mm kit lens for indoor flash photography.


Top
  
 
 Post subject:
PostPosted: Tue Oct 07, 2008 8:17 pm 
The only suggestion I can make is to get a good external flash. I had a similar problem with my Canon 70-300mm with the pop-up flash, but my 580 EX II speedlite handles the range just fine.


Top
  
 
 Post subject:
PostPosted: Wed Oct 08, 2008 8:50 am 
I still don't understand it. Is the lens obscuring the flash?


Top
  
 
 Post subject:
PostPosted: Wed Oct 08, 2008 9:21 am 
It may be obscuring it partially, but the major issue is range. The built in flash falls off after so many feet, an external flash has a much farther reach at the telephoto end. If you know someone with an external flash, you may want to just borrow theirs to see the difference. Even a camera shop may let you try one to see.


Top
  
 
 Post subject:
PostPosted: Wed Oct 08, 2008 12:04 pm 
That doesn't explain why with the kit lens, I get an effective flash range of up to 4 meters easily and I can zoom from 18 - 70mm and still use the flash.

With my Sigma, at 28mm, f/3.5, a flash compensation of +2 and my photos are still appearing dark. This is severely vexing me :(


Top
  
 
 Post subject:
PostPosted: Wed Oct 08, 2008 12:18 pm 
Offline
User avatar

Joined: Sat Feb 09, 2008 9:06 am
Posts: 388
Location: Manchester (UK)
What mode are you using P, Av, Tv, M etc.

In Av mode the camera meters for ambient light and the flash is used as fill-in flash not to illuminate the whole scene.

Try it in P mode and see if you get the same problem

just a thought

mirageII

_________________
Canon EOS 400D, EF-S 18-55mm, EF 24-105mm f/4L IS USM, EF 50mm f/1.8 MK I, EF-S 10-22mm, EF 70-200mm f/4L IS USM, EF 35mm f/2 IS, EF 85mm f/1.8
Canon 430EX II, Manfrotto 055CXPRO3, Arca Swiss P0
Panasonic GX1, Panasonic 20mm f/1.7, Olympus 45mm f/1.8
Canon EOS 30/33 and Pentax MX/ME Super
Rollei 35S

MY FLICKR!


Top
 Profile  
 
 Post subject:
PostPosted: Wed Oct 08, 2008 6:31 pm 
I got it working!

I changed Flash Control, from ADI Flash to Pre-flash TTL. No idea what that means, but it works great now and I get flash distances of up to 5 metres.


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  

All words, images, videos and layout, copyright 2005-2012 Gordon Laing. May not be used without permission.
/ How we test / Best Cameras / Advertising / Camera reviews / Supporting Camera Labs

Webdesign by Alphabase IT
Powered by phpBB® Forum Software © phpBB Group