Latest or all posts or last 15, 30, 90 or 180 days.
Get up to 16x more storage and 2x the speeds of the original drive
Handpicked deals...
$2998 $2498
SAVE $500

$350 $280
SAVE $70

$1598 $998
SAVE $600

$399 $329
SAVE $70

$1069 $869
SAVE $200

$1299 $899
SAVE $400

$1499 $999
SAVE $500

$1499 $1019
SAVE $480

$1799 $1349
SAVE $450

$3698 $2998
SAVE $700

$2397 $1897
SAVE $500

$1199 $898
SAVE $301

$1299 $1169
SAVE $130

$4499 $3999
SAVE $500

$1399 $1099
SAVE $300

$1499 $1299
SAVE $200

$4499 $3149
SAVE $1350

$2299 $1599
SAVE $700

$1799 $1349
SAVE $450

$2998 $2498
SAVE $500

$1299 $1124
SAVE $175

$2199 $1999
SAVE $200

$430 $230
SAVE $200

$3399 $2199
SAVE $1200

$6299 $3599
SAVE $2700

$400 $280
SAVE $120

$1499 $1019
SAVE $480

$1279 $719
SAVE $560

$1699 $1549
SAVE $150

Depth of field and megapixels

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. Click to see the whole frame from which the crops below were taken.

(To conserve viewing space, the railroad tracks were rotated to a horizontal position). Even at a greatly-reduced size, the foreground and background blur are evident—and this is at f11! Results are worse at f16 due to diffraction (I tried both apertures). Click for actual-pixels, or see below.

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.

Photos like the example make a good case for a reduced-frame sensor, such as found on the Nikon D200, where the smaller sensor allows use of a shorter focal length lens at the same subject-to-camera distance . See Depth of Field—The Shorter Focal-Length Advantage.


Best Deals, Updated Weekly
View all handpicked deals...

Beats by Dr. Dre Studio3 Wireless Bluetooth Headphones (76ers Blue / NBA Collection)
$350 $280
SAVE $70

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.