Upgrade the memory of your 2019 iMac up to 128GB
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$38 $19
SAVE $19

$12 $12
SAVE $0

$1799 $1349
SAVE $450

$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

$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 $1198
SAVE $300

$999 $949
SAVE $50

$1099 $999
SAVE $100

$400 $300
SAVE $100

Depth of Field and Megapixels

Last updated 2010-01-10 - Send Feedback
Related: depth of field, howto

See also Depth of Field.

Sometimes it’s worth reminding ourselves how little megapixels matter with some subjects—limited depth of field can eliminate nearly all of the potential resolution of an image. This example was shot with the Canon EOS 5D-IR (infrared conversion) using the EF 100-400/f4.5-5.6L IS USM at f11. Color as opposed to infrared would make little difference.

Even at this greatly-reduced size, the foreground and background blur can be seen—and this is at f11! Results are worse at f16 due to diffraction (I tried both apertures).

The image (cropped)

Below is an actual-pixels crop. Only a very narrow band of the entire frame is actually in acceptably sharp focus, no more than 300 pixels (out of 2912), probably no more than a 100 pixel band is at peak sharpness.

A 6-megapixel camera (instead of 12) wouldn’t produce an appreciably different result outside a narrow zone, something to keep in mind when considering megapixels.

Actual pixels
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...

Vello Octa Softbox for Portable Flash (Medium, 8")
$12 $12
SAVE $0

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.