Canon EOS 6D In-Depth Review
Resolution Chart Comparison (JPEG and Raw)
Images on this page are of our standard resolution chart which provides for measurement of resolution up to 4000 LPH (Lines Per Picture Height). A value of 20 equates to 2000 lines per picture height. For each camera we use the relevant prime lens (the same one we use for all the other tests in a particular review). The chart is shot at a full range of apertures and the sharpest image selected. Studio light, cameras set to aperture priority (optimum aperture selected), image parameters default. Exposure compensation set to deliver approximately 80% luminance in the white areas.
What we want to show here is how well the camera is able to resolve the detail in our standard test chart compared to the theoretical maximum resolution of the sensor, which for the charts we shoot is easy to work out - it's simply the number of vertical pixels (the chart shows the number of single lines per picture height, the theoretical limit is 1 line per pixel). Beyond this limit (which when talking about line pairs is usually referred to as the Nyquist frequency) the sensor cannot faithfully record image detail and aliasing occurs.
This limit is rarely attained, because the majority of sensors are fitted with anti-aliasing filters. Anti-aliasing filters are designed to reduce unpleasant moiré effects, but in doing so, they also reduce resolution (the relative strength and quality of these filters varies from camera to camera). In theory though, a sensor without an AA filter, when coupled with a 'perfect' lens, will deliver resolution equal to its Nyquist limit. Therefore, even though it may be effectively unattainable with normal equipment in normal shooting situations, an understanding of a sensor's theoretical limit provides a useful benchmark for best possible performance. Nyquist is indicated in these crops with a red line.
On this page we're looking at both JPEG and Raw resolution. For a (more) level playing field we convert the latter using Adobe Camera Raw. Because Adobe Camera Raw applies different levels of sharpening to different cameras (this confirmed) we use the following workflow for these conversions:
- Load Raw file into Adobe Camera Raw (Auto mode disabled)
- Set Sharpness to 0 (all other settings default)
- Open file to Photoshop
- Apply a Unsharp mask tuned to the camera, here 180%, Radius 0.4, Threshold 0
- Make 100% crops and save the original file at JPEG quality 11 for download
|JPEG (5472 x 3648) 4.5MB||JPEG (5472 x 3648) 5.4MB|
The resolution chart shows off just how ineffective the JPEG engine is at rendering fine detail. The 6D comfortably renders detail up to around 2600 lph (which is what you'd expect), but the JPEG gives up very soon after this point, whereas Raw processing and fine-radius sharpening allows you to realize convincing detail beyond 2800 lph Moiré and false color creep in beyond this point, but this is necessary to reach the 2800+ lph that the Nikon D600's 24MP sensor can produce.
|First, Let me check its expiry date. by rajeev22675|
from Best Photo of the Week
|Dairy Way by BodkinsBest|
from Best Astrophotography Landscape #4
This week Chris and Jordan take the new Leica Q2 for a spin, and while most of us in the Northern Hemisphere are welcoming spring, they head even farther north than usual to visit ice castles. Because #Canada.
Harvard is facing a lawsuit over profiting from 19th century daguerreotypes that captured the portrait of a slave and his daughter on a South Carolina plantation.
From the detailed textures in rural landscapes to the incredible lighting inside futuristic buildings, the photorealism of Unreal Engine 4 is blurring the lines between fiction and reality...you know...aside from the spaceship.
According to a report from The Informant, a number of Instagram users' passwords were shared as plaintext in URLs used to download their data.
We've added Panasonic's new Lumix S1 and S1R full-frame mirrorless cameras to three of our buying guides. If you're looking for a quick summary of each model, then have a read.
YouTube channel Photoshop Cafe has shared a video detailing ten tips and tricks you can do to both fix and speed up Photoshop when it's running slow and sluggish.
It's not going to be the banger of the year, but it'll get a few laughs.
DJI has confirmed its drones won't be affected by the GPS 2019 week rollover.
Dogfish Head Craft Brewery has teamed up with Kodak to release a beer that's capable of doubling as a film developer.
The Diana Instant Square is a retro-inspired camera with manual controls that's fun to shoot in good light, but largely unpredictable in its operation.
Residents of a Paris street plagued by Instagrammers, selfie takers and music video crews are asking the city government for a weekend and evening ban to give them some peace.
The adapter plugs into the Osmo Pocket's USB Type-C port and features a 3.5mm TRS jack to plug in various external microphones.
Checkout allows Instagram users to select products for purchase and make payments directly in the app.
GauGAN as it's known, can create photorealistic images from basic drawings using the power of artificial intelligence.
The EOS RP is Canon's latest full-frame mirrorless camera, with diminutive dimensions and a diminutive price. Find out how it stacks up and get our thoughts in our early review.
Montana judge Dana L. Christensen has ruled the Republican National Committee did not infringe upon the copyright of photographer Erika Peterman after they took a photo from a Democratic candidate's Facebook page without permission and altered it to use in a derogatory promotional mailer.
Nikon has launched updates for three of its programs to address various bugs and glitches that could cause crashes and unwanted results.
LEE Filters has launched the LEE100, its next-generation filter holder that improves the design and looks in all the right places.
With the arrival of some much-needed sunshine and final production firmware for the Panasonic S1, we've been able to get outside and really start putting the camera through its paces.
Importing, culling and tagging photos is about to get a whole lot faster and look a whole lot better with the impending arrival of Photo Mechanic 6.
On its own, the FTZ adapter retails for $250 and when bundled it dropped the cost to just $150. Now, Nikon is offering it for free with all Z6, Z7 purchases in the United States.
Profoto said it spoke with Godox back at Photokina 2018 and continues to contact Godox in an effort to stop it from marketing its V1 light.
Product renders in Italian publication Notebook Italia show an unusual design that conceals all cameras with the help of a slider mechanism.
Canon says its new EF 400mm F2.8L IS III and EF 600mm F4L IS III lenses can suffer from an intermittent flickering when shooting video in M or Av modes with certain cameras.
Leica recently announced the Q2, a digital rangefinder with a fixed 28mm F1.7 lens. It's a heck of a lot of fun to shoot with, but is it right for you? Based on our time with the camera, and its specifications, we've examined how well-suited it is for common photography use-cases.
Now that our Panasonic Lumix S1R has final firmware, we couldn't wait to get out shooting with it - and we also tried the high-res mode, which combines files to get 187 megapixel images. Because sometimes, 47 megapixels just isn't enough.
In this article, travel and landscape photographer Mitch Green encourages us to spend more time in the the field.
the lens lacks any electronics whatsoever and is constructed entirely of glass and metal. Of course, that comes at the expense of weight — this thing weighs in at 1.1kg / 2.43lbs.
Drones can be useful tools in urban areas, where they're utilized for everything from news reporting to building inspections, but flying in these areas requires careful preparation. Here's what you need to know to do so safely.
Hasselblad has released a new cable release and USB double battery charger for its X1D medium format camera .