PDA

View Full Version : Contrast teststrip again???



OMU
08-19-2010, 11:40 AM
Hi;
I'm calibrating my ZoneMaster for Foma Variant 111,
but i made the test strip for contrast calibration on the wrong channel - PAP 4.:cry: - not PAP 3. (PAP 4 is for FOMATONE and has an different correction factor).

Do I have to make the contrast teststrip again.... ??

Regards
OM

RH Designs
08-19-2010, 12:47 PM
Hi OM

If you made the strips using the Step Wedge then that's fine, you can use them as is because the exposure correction does not affect the range of contrast shown by the step wedge when using that method.

If you used the alternative method described in section 5.4 of the Calibration Manual, I'd advise you to make new ones. The ones you already made can be used but it's rather a tricky calculation to remove the effects of any adjustments already in PAP4.

OMU
08-19-2010, 01:55 PM
Thanks for your answer,
I used the step wedge, and it's as I thought. :-)

OM