Comments on: Over-exposed Flash Shots with Tamron AF 17-50 F/2.8 XR Di II http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/ All about digital photography - DPTnT Wed, 17 Mar 2010 21:16:03 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: picmax http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-369 picmax Wed, 15 Oct 2008 10:07:47 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-369 If you increase ISO on the camera, it can reach further than 3.71m. So 3.98m is not necessarily its limit.<br><br>Max If you increase ISO on the camera, it can reach further than 3.71m. So 3.98m is not necessarily its limit.

Max

]]> By: Wu Yongzheng http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-367 Wu Yongzheng Wed, 15 Oct 2008 05:37:27 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-367 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.<br><br>I will do some test using my SB600, and let you know the result. 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.

]]> By: picmax http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-337 picmax Mon, 29 Sep 2008 03:59:19 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-337 Very interesting.<br><br>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.<br><br>Max 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

]]> By: Wu Yongzheng http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-336 Wu Yongzheng Mon, 29 Sep 2008 03:49:51 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-336 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.<br><br>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. 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.

]]> By: picmax http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-62 picmax Sat, 22 Dec 2007 13:28:53 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-62 Ed, Thanks for reminding me! Hopefully I will have time during the holidays to work on it. Max Ed,

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

Max

]]> By: Ed W Grenzig http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-61 Ed W Grenzig Fri, 21 Dec 2007 22:19:45 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-61 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 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

]]> By: picmax http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-60 picmax Sun, 16 Dec 2007 21:42:20 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-60 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. 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.

]]> By: Mark http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-59 Mark Sun, 16 Dec 2007 19:39:32 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-59 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) 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)

]]> By: picmax http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-29 picmax Mon, 05 Nov 2007 02:49:29 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-29 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 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

]]> By: Tom http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-27 Tom Thu, 25 Oct 2007 14:39:38 +0000 http://dptnt.com/2007/10/over-exposed-flash-shots-with-tamron-af-17-50-f28-xr-di-ii/#comment-27 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 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

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