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Upgrade the memory of your 2018 Mac mini up to 64GB

Sigma sd Quattro JPEG File Quality in Black and White + sd Quattro JPEG bug in Black and White + fix

Sigma sd Quattro
(APS-C sensor)

See my Sigma mirrorless wish list at B&H Photo.

With the challenges presented by the Sigma Photo Pro software when dealing with X3F raw files, Sigma sd Quattro users might consider JPEG if the image quality is there.

In-Camera JPEG: Quality and Variations, Black and White

Includes the six black and white in-camera JPEG variants plus a reference black and white image made in Photoshop from an RGB JPEG, at up to full camera resolution.

The results from the camera are awful: the in-camera black and white variations are unacceptably dark. This in spite of them having a full-range histogram from black to white. This appears to be a BUG related to color space, but that is only a guess. In essence, it looks like the sd Quattro is processing into some grayscale colorspace, but tagging it as AdobeRGB. Or something like that.

A mitigation/workaround fix in Photoshop is shown, which results in far better results, but to my eyes, the conversion from the color JPEG in Photoshop is the best of all.

Black and white JPEG bug aside, that the Sigma sd Quattro makes for an outstanding color or black and white camera is plain to see (at least at ISO 100). Detail is outstanding, well beyond what any Bayer matrix camera can deliver for this number of pixels.

Grayscale conversion from color JPEG
f8 @ 0.6 sec, ISO 100; 2016-08-07 12:35:21
sd Quattro + Sigma 30mm f/1.4 DC HSM Art @ 45mm equiv (30mm)

[low-res image for bot]
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ No more slow and noisy hard drives!
Save Big $$$$ on Memory for 2019 Mac Pro

Up to 65% better pricing than Apple

Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).


OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!

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Apple iPad Pro 12.9" (64GB, Wi-Fi + 4G LTE, Space Gray, Previous Gen)
$1149 $799
SAVE $350

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