The Sigma SD1 Merrill is a professional APS-C DSLR featuring the 46 MP Foveon X3 Merrill sensor at a revised retail price, making the SD1's exceptional three-layer color capture more accessible. It retains the full weather-sealed magnesium alloy body and Sigma SA lens compatibility of the original SD1. The SD1 Merrill is the revised flagship of Sigma's SD DSLR line.
Product released: June 1, 2012
Latest firmware version
Version 1.09, released April 23, 2014
Last checked for updates: Oct 31, 2026 17:43 UTC
What's new in version 1.09
Accuracy of Auto Focus is improved by enhancement of the algorithm.
The Sigma SD1 Merrill is a professional APS-C DSLR featuring the 46 MP Foveon X3 Merrill sensor at a revised retail price, making the SD1's exceptional three-layer color capture more accessible. It retains the full weather-sealed magnesium alloy body and Sigma SA lens compatibility of the original SD1. The SD1 Merrill is the revised flagship of Sigma's SD DSLR line. It was originally released on June 1, 2012.
What is the latest firmware version of Sigma SD1 Merrill Camera?
The latest firmware version of Sigma SD1 Merrill Camera is 1.09. It was released on April 23, 2014.
What changed in Sigma SD1 Merrill Camera firmware version 1.09?
Sigma SD1 Merrill Camera firmware version 1.09 includes the following changes: Accuracy of Auto Focus is improved by enhancement of the algorithm.
Where can I download the latest Sigma SD1 Merrill Camera firmware?
Details and download instructions for the latest Sigma SD1 Merrill Camera firmware (version 1.09) are on Sigma's official release page: https://www.sigma-global.com/en/support/firmware/sd1-merrill/