HTP on a 40D

This is the reply I got form Canon asking about HTP, and the process as to how it using HTP enabled effected the image, I asked if it was a DDP/software process, or applied to the image in camera, and was not a software process after

"Dear Customer,


Thank you for your recent enquiry regarding your Canon EOS 40D.

From the information supplied I can confirm that Highlight Tone Priority improves the highlight detail. The dynamic range is expanded from the standard 18% gray to bright highlights. The gradation between the grays
and highlights becomes smoother.

The custom function on the EOS 40D gives you the option to enable or disable Highlight Tone Priority. When enabled, it will be applied to the image on the camera."

For me would be the logical way to do it, not everyone uses DPP, and may print straight from camera (if you can with raw images)
Oh took about two weeks to get that reply

I thought that was how it worked anyway. The first part is in the manual and as its effecting the histogram and exposure i thought it was working on the image. Nothing to do with out of camera software.

MaDProFF,
I haven't used that feature yet, have you? has anyone?
If so post an example please
I think when the weather gets better here (which wont be for a while) I will give it a try.

I have been using it quite a lot, for football matches, it does what it is suppose to, and when you look at the histograms you can see where it has suppresses the brightness at the top end, seems pretty consistent too.

As for photos, not got any that shows with and with out. there are a load of photos on my web site, the moto X gallery are all with HTP enabled
Never had done a moto x before either, no big jumps though HTP would have been a big help on those

It is applied to the jpegs but not the raws.

When looking at a photos with HTP enabled there is a clear difference when viewing it with PSCS3 ACR which do not support HTP and when viewing with DPP. At least thats the case with 1D MK III HTP. But of course it is possible they changed it for 40D.

See here and here.

I don't use Jpgs, only raw, and according to Canon it is applied to the image in camera on a 40D, I only asked about a 40D

MaDProFF wrote in post #4092689
I don't use Jpgs, only raw, and according to Canon it is applied to the image in camera

Well don't you see a difference in the histograms I posted ? If it were applied to the raw image then why is the histograms then different when viewing with DPP & ACR ?

MaDProFF wrote in post #4092444
The custom function on the EOS 40D gives you the option to enable or disable Highlight Tone Priority. When enabled, it will be applied to the image on the camera."

Looks to me like he did no more than parrot the press release from 6 weeks ago. Specifically, he did not distinguish between jpg and RAW output. Obviously HTP is applied to jpgs in-camera. The real question is whether RAWs are altered in-camera and people on DPR (http://forums.dpreview​.com …rum=1019&messag​e=25117208 for instance) have demonstrated that they are not altered other than being underexposed and a metadata tag added which signals DPP 3.1 to use a tone curve which applies greater expansion to the shadows while protecting the highlights. This is all well and good, but it is no more than RAW shooters who use a converter that allows editing the tone curve have been doing all along.

Like High ISO NR, 1/3 ISO increments and ISO Expansion, HTP is great for jpg shooters but of less use to RAW shooters.

tommykjensen,
Thanks for the example
When looking close it does seem to help with the shadow areas ex. the persons shorts and controls highlights ex. the girls skin reflecting sun. However it almost looks like saturation is also changed (probably calming the yellow channel?).