Anyway, this post is not about that per se, but about the limitations it puts on your ISO range. We'll show you some examples of images with and without HTP in a future post.
This list shows you the standard ISO range (with expansion turned on) of the camera and the ISO range once Highlight Tone Priority is turned on.
EOS-1D Mark III - STD: 50-6400, HTP:ON 200-3200
EOS-1Ds Mark III - STD: 50-3200, HTP:ON 200-1600
EOS 5D Mark II - STD: 50-25,600, HTP:ON 200-6400
EOS 50D - STD: 100-12,600, HTP:ON 200-3200
EOS 40D - STD: 100-3200, HTP:ON 200-1600
EOS 450D - STD: 100-1600, HTP:ON 200-1600
For a quick way to check if you have HTP switched on or not, looked at the information screen - either the top LCD panel for those cameras that have one, or the rear LCD for the EOS 450D.
On the EOS-1D/1Ds Mark III, EOS 40D and EOS 450D, the ISO speed when HTP is turned on, will show with small zeros eg: 2oo rather than 200. For the EOS 5D Mark II and EOS 50D, this has been changed so that it now shows D+ on the top LCD panel.
-blabpictures-
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