Latest or all posts or last 15, 30, 90 or 180 days.
Welcome to diglloyd.com
In-depth review coverage is by subscription.
Also by Lloyd: MacPerformanceGuide.com and WindInMyFace.com
First-time visitor
Up to 1527MB/s sustained performance
🌈Shooting in Mountains thru ~Oct 27
I descend for internet service each day *when feasible*, but not always. Please be patient when subscribing. Hiking injured knee but cycling is therapeutic.

Nikon Z7: Thin 1.1mm Sensor Cover Glass Gives Promise of using M-Mount Lenses with Good Performance

See my Sony mirrorless wishlist and Nikon mirrorless wishlist and Canon mirrorless wishlist.

The Kolarivision teardown of the Nikon Z7 finds that the sensor cover glass is only 1.1mm thick, which is much thinner than the 2mm on most cameras:

Another unique aspect: the cover glass of the Z7’s sensor is about half a thick as the Sony’s, coming in at 1.1mm. This means the Nikon will have better performance with adapted lenses right out of the box. However, with our ultra-thin conversion measuring down to 0.2mm, the camera will still benefit a great deal from a modification service if you’re a Leica lens (or other legacy glass) enthusiast.

The thinner glass means that the MTF (micro contrast and astigmatism in particular) degradation will be much less than on the Sony A7R III, suggesting that M-mount lenses (Leica M and Zeiss ZM) may perform reasonably well. Though a high refractive index cover glass cannot be ruled out AFAIK.

See ray angle and Zeiss ZM 35mm f/1.4 MTF on Mirrorless Cameras for a full aperture set of MTF graphs for the Zeiss ZM 35mm f/1.4 Distagon. It would be wonderful if the ZM 35/1.4 and my Leica M lenses worked well on the Z7 (assuming an adapter materializes).

Depiction of ray paths through sensor cover glass

The graph below is a through-focus MTF graph which indicates the displacement of the blue-vs-red wavelengths for two different thicknesses of sensor cover glass. Without sensor cover glass (e.g., film), the red and blue MTF are close to alignment.

With 2.5mm sensor cover glass, the two diverge substantially, so that peak focus can be achieved for only red or blue, but not both. Moreover, MTF for red wavelengths is degraded slightly and MTF for blue increases slightly.

Through-focus MTF for Zeiss ZM 35mm f/1.4 Distagon, without sensor cover glass vs 2.5mm cover glass
Durable and fast, up to 1800MB/s
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 15 hours unless noted. Certain deals may last longer.
$2699 SAVE $300 = 10.0% $38 FREE ITEMS Canon 11-24mm f/4 EF L USM in Lenses: DSLR
$774 SAVE $222 = 20.0% $100 GIFT CARD Pentax 10x43 Z-Series ZD ED Binocular in All Other Categories
$1497 SAVE $400 = 21.0% $82 FREE ITEMS Pentax K-1 DSLR in Cameras: 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.