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Sigma SD14

Crop from original image (SPP processed)

Update on SD14 saturation issue

Email to Sigma America

Dear Mr. @@@@,

Thanks for taking the time to speak with me today.  As we discussed, I have made a few small discoveries since our original discussions several months ago, that may shed some light on the red channel overexposure that I have experienced in certain situations using my SD14.  Rather than a capture problem in the camera, I have discovered that the issue may be related to the color-space conversion performed by the Sigma Photo Pro software during X3F import.

I have attached two versions of an image, one that illustrates the color issue that I have experienced in scenes that push the limits of the color space (gamut) used in the current Sigma Photo Pro 2.5 software. The difference between these images is obviously intended to represent a worst case scenario, so please don’t regard the “original” over-saturated image as the work of a talentless hack — it is purely for illustration purposes!

Click to read on –> More >

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Sigma SD14 Saturation Problem

From: Jason Porter
Date: Thu, May 1, 2008 at 12:14 AM
Subject: SD14 Problem – Unusual Saturation
To: info@sigmaphoto.com
Cc: support@sigma-photo.co.jp
Attn: @@@@@ at Sigma America


As we discussed on the phone, I am writing to document my new SD14 camera’s unusual red saturation problem and provide raw X3F samples for your review.

Before I explain, here are the details of my particular unit and configuration:

Sigma SD14
serial no. [redacted]
firmware revision 1.07

Sigma 18-50mm F/2.8 EX Macro
serial no. [redacted]

Using Sigma Photo Pro 2.5 in Windows XP, using a color-corrected display (Spyder2Express calibrated).

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