Digital Photography Tips and Techniques - Latest Comments in Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

picmax — Wed, 15 Oct 2008 08:07:47 -0000

If you increase ISO on the camera, it can reach further than 3.71m. So 3.98m is not necessarily its limit.

Max

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

Wu Yongzheng — Wed, 15 Oct 2008 03:37:27 -0000

No, I haven't noticed any under-exposure because I bought SB600 just recently. Before that, I used the D80 build-in flash which has a guide number of 13. Given the max aperture f/3.5 of the lens, the built-in flash only reaches 3.71m. So 3.98m is beyond its capacity anyway.

I will do some test using my SB600, and let you know the result.

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

picmax — Mon, 29 Sep 2008 01:59:19 -0000

Very interesting.

Do you have flash exposure problem with this lens? I'd expect it to under-expose for subject more than 3.98m away in TTL-BL mode.

Max

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

Wu Yongzheng — Mon, 29 Sep 2008 01:49:51 -0000

Really nice discovery and analysis. I found out that my nikon 18-135 lens also gives incorrect distance information. For distance less than 3.98m, it reports correctly. For distance more than 3.98m, it always reports 3.98m.

I have checked some pictures taken by other people using this nikon 18-135 lens. They share the same problem. If fact I haven't found out any sample taken by this lens with recorded focus distance larger than 3.98m.

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

picmax — Sat, 22 Dec 2007 08:28:53 -0000

Ed,

Thanks for reminding me! Hopefully I will have time during the holidays to work on it.

Max

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

Ed W Grenzig — Fri, 21 Dec 2007 17:19:45 -0000

when will the article you reference below be available??

The technical details behind Nikon’s 3D Matrix TTL-BL flash is quite complex. I will be writing an article about it in near future

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

picmax — Sun, 16 Dec 2007 16:42:20 -0000

I have the Nikkor 18-70mm from the D70 package a while ago. It is a very good value. I was curious why Nikon was no able to squeeze out a f/2.8 DX lens since both Tamron and Sigma also have the same 67mm filter thread size. However I found f/2.8 to be very valuable especially for low light situations.

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

Mark — Sun, 16 Dec 2007 14:39:32 -0000

I used to have the Tamron 17-50mm and ended up selling it. It did over-expose frequently with flash and also, I noticed the images always had a slight orange tinge to them...as if the white balance was overly warm. Yes, colour correction could be done, but I prefer minimizing post work. I ended up buying the 18-70mm Nikon which is obviously less fast, but the image quality is considerably better and for some reason I find this lens incredibly easy to hand hold. (1/5th at 18mm and 1/15th at 70mm is possible for some odd reason, perhaps I have very stable hands or something)

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

picmax — Sun, 04 Nov 2007 21:49:29 -0000

Tom,

Thank your for commenting. It is not difficult to find people who love all of the three lenses. If you can afford one, the Nikon 17-55mm is probably the best. The Tamron is 1mm wider than Sigma.So the best suggestion is to test all of them and choose the one you like the most.

Max

Re: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II

Tom — Thu, 25 Oct 2007 10:39:38 -0000

Thanks for the research on this subject. I've been looking at the Tamron, Sigma and the Nikon 2.8 in that range. Do you have any thoughts on the subject??? I found this at Dp and will be bookmarking this site for further reading.
Thanks
Tom