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...
$170 $130
SAVE $40

$1799 $1799
SAVE $0

$1399 $1049
SAVE $350

$150 $50
SAVE $100

$380 $340
SAVE $40

$489 $389
SAVE $100

$274 $174
SAVE $100

$400 $300
SAVE $100

$699 $499
SAVE $200

$1997 $1097
SAVE $900

$499 $499
SAVE $0

$4500 $3500
SAVE $1000

$1000 $500
SAVE $500

$700 $600
SAVE $100

$1499 $699
SAVE $800

$700 $600
SAVE $100

$1499 $699
SAVE $800

$369 $200
SAVE $169

$1699 $1199
SAVE $500

$649 $449
SAVE $200

$1498 $998
SAVE $500

$999 $949
SAVE $50

$1099 $999
SAVE $100

$400 $300
SAVE $100

Apple 15" 2019 MacBook Pro
Only $2799 $1999

16GB / 512GB SSD / 2.3 GHz 8-core
Like new, refurbished.
macOS 10.14 Mojave, 90 day warranty.

Perfect for high-school or college student!

Shop all Firecracker savings...

Nikon D810: can it compete with Pentax 645Z?

Pre-order the Nikon D810 at B&H Photo. Also, LensRentals.com rents the Nikon D810.

My expectation is that the Nikon D810 sensor will be of the same generation and quality as the Pentax 645Z sensor, both being made by Sony is my understanding. With only a slightly smaller photosite size (4.88 microns vs 5.3 microns, ~20% in area), I’d expect the D810 to offer per-pixel quality not too far off from the 645Z. Elecronics matter too, as does the quality grade of the sensor, so that is all a little rough. But what really does matter is lenses, and there, Zeiss Otus on Nikon has few if any equivalents on Pentax. Lenses are big deal for any system.

So I hope to get out in the field with both by the end of this month, and do some field work side by side. But first, I’ll nail down some stuff on my temporary home-grown test scene, which offers an effective proving ground. The main issue is how to match field of view; there is no good equivalent focal length match for a 90mm on the Pentax 645Z. Reader Andrej K points to the Sigma 70mm f/2.8 EX DG Macro, but it’s no match either (66mm needed for a D810 crop to 4:3 or 75mm needed for a width match). Testing for a 4:3 match shows an 8% difference—too much.

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).



Save the tax, we pay you back, instantly!

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.