350D modded and photoshop problems

[gfletcher]

Hi Guys

I am after some advice from you imagers out there.

When opening a DSS Autosave.tif in photoshop CS3 i change from 32 bits/channel to 16 bits / channel.

When the HDR conversion box opens which method do you choose?

Exposure & Gamma

Highlight Compression

Equalize Histogram

or

Local Adaption

The reason i ask is i have always chosen the method Exposure & Gamma (probably because it is the top one in the box).

Opening the DSS Autosave.tif last night and processing in CS3 when i used the Exposure & Gamma method and then used levels and curves the image seemed to bring out a green tint around the edges of the image and a red tint around the central subject !!!

I then put the RAW images , darks, flats and bias frames through DSS again and this time in CS3 i chose the Equalize Histogram method which seemed to eliminate these unusal colour tints

Any views on this ??

Secondly

Which parameter setting do you gys imaged with a Canon DSLR set ?

Parameter 1

or parameter 2

For last nights imaging session i changed the setting on the camera to:

Parameter 2 (i think iread somewhere that this is the most suitable setting)

Could this have caused the problem?

Thirdly

The flats i am taking using a homemade lightbox with my modded 350D i have now (modded by filter removal) which i take purely by using the AV setting on the cameraare coming out a bright white colour.

Previously on my unmodded 350D using the same method the flats were coming out smack on what they should be like ( i.e central on the histogram)

Do i have to use adifferent approach when taking flats through my modded camera ?

all advice very much appreciated

thanks

Graham

[greenkat]

I can never open the autosave file in photoshop, I get an error message.

In DSS I manualy select save image to file as a tiff and never get asked to convert anything.

Cant help with the Canon but maybe someone else can

[Psychobilly]

Chances are its being saved as a 32 bit tiff which requires later editions of CS...to be able to open them...

Save the file using "Save Picture to file" and select 16 bit tiff if you have PS or the earlier versions of CS (1 &2)....

Peter...