Latest or all posts or last 15, 30, 90 or 180 days.
Welcome to
In-depth review coverage is by subscription.
Also by Lloyd: and
First-time visitor
Up to 1527MB/s sustained performance

Nikon D810: can it compete with Pentax 645Z?

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

Durable and fast, up to 1800MB/s
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 8 hours unless noted. Certain deals may last longer.
$1199 SAVE $500 = 29.0% $19 FREE ITEMS Canon 18x50 IS Image Stabilized Binocular in All Other Categories
$1049 SAVE $450 = 30.0% $20 FREE ITEMS Canon EOS 77D DSLR with 18-135mm USM in Cameras: DSLR
$65 SAVE $25 = 27.0% $19 FREE ITEMS Celestron 15x70 SkyMaster Binocular in All Other Categories
$1697 SAVE $300 = 15.0% Nikon D750 DSLR in Cameras: DSLR
$2197 SAVE $900 = 29.0% Nikon D750 DSLR with 24-120mm in Cameras: DSLR
$3297 SAVE $800 = 19.0% Nikon D810 DSLR with 24-120mm in Cameras: DSLR
$300 SAVE $160 = 34.0% $9 FREE ITEMS Steiner 8x32 XC Binocular in All Other Categories
$1099 SAVE $200 = 15.0% ZEISS 25mm f/2 Batis in Lenses: Mirrorless
$1299 SAVE $200 = 13.0% ZEISS 21mm f/2.8 Loxia in Lenses: Mirrorless
$1999 SAVE $300 = 13.0% ZEISS 18mm f/2.8 Milvus ZF.2 in Lenses: DSLR

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2008-2017 diglloyd Inc, all rights reserved.