Latest or all posts or last 15, 30, 90 or 180 days.
Upgrade the memory of your 2019 iMac up to 128GB
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$950 $330
SAVE $620

$2799 $2499
SAVE $300

$1499 $899
SAVE $600

$799 $639
SAVE $160

$1180 $1050
SAVE $130

$150 $90
SAVE $60

$2399 $2159
SAVE $240

$1999 $1799
SAVE $200

$1099 $899
SAVE $200

$259 $209
SAVE $50

$1199 $1079
SAVE $120

$599 $199
SAVE $400

$819 $649
SAVE $170

$348 $298
SAVE $50

$2799 $2149
SAVE $650

$750 $450
SAVE $300

$300 $170
SAVE $130

$1099 $899
SAVE $200

$280 $220
SAVE $60

$1299 $1169
SAVE $130

$250 $250
SAVE $0

$998 $498
SAVE $500

New Mac?

Work from home?
Consult with Lloyd before buying!


System configuration for CPU, GPU, memory, SSD, backup, RAID, optimizing performance, workflow.
For YOUR optimal workflow

Avoid costly mistakes in throwing money at the problem for less performance and/or buying the wrong machine for your own needs!

Remote screen sharing available for RAID, software configuration, etc.

More about 2019 Mac Pro vs iMac 5K vs iMac Pro...

Sigma FE 105mm f/1.4 DG HSM Art Examples: Alabama Hills (Sony A7R IV)

I’ve added two examples below at full resolution in:

Sigma FE 105mm f/1.4 DG HSM Art Examples: Alabama Hills

I just love how the Sigma FE 105mm f/1.4 DG HSM Art delivers outstanding real (actual) depth of field. It makes a terrific lens for panoramas and stitched images.

I really should buy this sample, because it shows perfect symmetry and amazing sharpness, better than the sample I tested on the Nikon D850 some time ago, even though the sensor on the Sony A7R IV raises the ante to 60MP.

CLICK TO VIEW: Outstanding Sigma Lenses for Sony FE

This 2 X 2 stitched 129-megapixel image surely contains more detail than I could have obtained with the PhaseOne IQ4 150 megapixel, that is, because of lens quality and depth of field. At about 1/10 the cost.

Granite formation in Alabama Hills, Pre-Dawn Glow
f8 @ 1.6 sec electronic shutter stitched from 4 frames (2 X 2) cylindrical, ISO 100; 2020-03-24 06:33:40
Sony A7R IV + Sigma FE 105mm f/1.4 DG HSM Art
ENV: Alabama Hills, altitude 5150 ft / 1570 m, 30°F / -1°C
RAW: LACA corrected, distortion corrected, vignetting corrected

[low-res image for bot]
Lone Pine Peak to Mt Whitney, Pre Dawn
f3.2 @ 20.0 sec EFC shutter panorama 6 frames cylindrical, ISO 100; 2020-03-24 06:07:38
Sony A7R IV + Sigma FE 105mm f/1.4 DG HSM Art
ENV: Alabama Hills, altitude 5150 ft / 1570 m, 30°F / -1°C
RAW: LACA corrected, distortion corrected, vignetting corrected, USM {8,50,0}, SmartSharpen{40,0.7,20,0}

[low-res image for bot]
Lone Pine Peak to Mt Whitney, First Sunlight
f4.5 @ 1/60 sec electronic shutter panorama 6 frames reposition, ISO 100; 2020-03-24 06:48:52
Sony A7R IV + Sigma FE 105mm f/1.4 DG HSM Art
ENV: Alabama Hills, altitude 5150 ft / 1570 m, 30°F / -1°C
RAW: LACA corrected, distortion corrected, vignetting corrected, +30 Shadows, +40 Whites, USM {8,50,0}, SmartSharpen{30,0.7,20,0}

[low-res image for bot]

MacPerformanceGuide.com

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.