Latest or all posts or last 15, 30, 90 or 180 days.
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$131 $100
SAVE $31

$539 $399
SAVE $140

$18599 $17599
SAVE $1000

$600 $400
SAVE $200

$274 $174
SAVE $100

$1799 $1399
SAVE $400

$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 $699
SAVE $0

$1597 $1097
SAVE $500

$499 $499
SAVE $0

$4500 $4500
SAVE $0

$1000 $1000
SAVE $0

$700 $700
SAVE $0

$1499 $699
SAVE $800

$700 $700
SAVE $0

$1499 $699
SAVE $800

$369 $200
SAVE $169

$1699 $1399
SAVE $300

$649 $649
SAVE $0

$1498 $998
SAVE $500

$999 $949
SAVE $50

$1099 $999
SAVE $100

$400 $300
SAVE $100

Memory Upgrades for 2019 Mac Pro - Save Up to 65% vs Factory Costs
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 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.

Update 2018-11-03: turns out that the 1.1mm figure from KolariVision for the sensor cover glass does not include the expoxied-on glass portion of the sensor. So the real figure is ~2.3mm total glass thickness, not 1.1mm (Nikon D850 is about ~2.5mm). Still 2.3mm is notably more thin than the 3+ mm for Sony mirrorless. I’ll have to see what actual testing shows.

...

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
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).



MacPerformanceGuide.com
View all handpicked deals...

Pelican 1520NF Case without Foam (Silver)
$131 $100
SAVE $31

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.