Change of Subject
HDR Guidelines Part 2
-Manual mode
- ISO: 100 Canon / 200 Nikon
-Constant Aperture = vary shutter speed only
-Constant White Balance
-Continuous shooting drive mode – high if you have it
-Focus – One shot or one time.
-Use AF to assist and either hold AF-On button continuously through the shots or switch to manual focus after focus lock is achieved.
-Shoot RAW
-Use auto exposure bracketing (AEB) functionality as much as possible
-Know your camera’s capes and lims
-Use +/- 2 EV jumps (new Nikons only have 1 EV jumps available)
-Some scenes may use +/-1 EV for better results
How Many Shots?
-Depends on the scene’s dynamic range (DR)
-Meter the highlights and shadows and determine the difference between the two in stops
For example, with a constant aperture and ISO the highlights are exposed properly at 1/8000 and the shadows at 1/15, there is a 9 stop difference.
-Shoot the required number of shots at your desired interval. In our above example, take nine shots 1 EV apart or 4-5 shots 2 EV apart (sometimes even with a 9 stop difference as above you can cover with a three shot sequence at 0, +2, and -2 EV)
-Use AEB to capture the full range for increased efficiency.
-First shot determines the starting point of the full DR captured with your series of shots
-In the example above (highlights at 1/8000 and shadows at 1/15,) full stops between are shown below. 1/500 is the center point of the dynamic range. Only whole stop increments are depicted. Each green bar shows one shot and the associated range.
-We arrive at the efficient method by shooting our first shot in the middle of the range and then shooting two addition images at +2 and -2 EV. New Nikons will need to shoot 5 images at the max 1 EV spacing to generate the 9 stops of usable data.
-Biasing the initial capture EV will skew the range as well.
-AEB may be used in series to expand range even further
-For example take first 3 shots at -2, -4, and 0 take second three shots at +2, +4, and 0
-Total range will be 13 stops of data (-4 to +4 = 8 stops plus 2.5 usable at each end.)
Part 3 next week.
Fiat Lux!
Free Monday Night Light Link
https://www1.gotomeeting.com/register/867957785
See you online!
Fiat Lux!
Hal
"Hey Hal?" Lightroom Photomatix Pro Plug In
When Tone Mapping is complete and you click Save and Re-import Photomatix will process the results and bring the image back into the LR catalog. If you clicked the stack with highlighted photo option, LR will stack the tone mapped, processed image with one of the source files. Every now and again the stack symbology will show up but the stack will not expand. This is a bug on the Mac and on Windows.
To regain full stack functionality, go to the Left Panel Folders Tab and click on the folder that contains the stacked images. When you highlight the folder, the stack will work properly.
Fiat Lux!
Hal
Programming Custom User Settings for Canon DSLRs
The "C" options are programmable with just about every function on your camera. At LIGHT, we have found setting these custom modes is a huge benefit when shooting. When properly configured switching between shooting modes does not get any more effective or efficient.
LIGHT recommends setting the dials as follows (this is, of course, our recommendation and your own settings may vary)
C1 = Portrait. We consider "portrait" to be a broad category when we the shooter and the target, make that subject (old fighter pilot habits sometimes die hard) are both stationary. This applies to actual portraits, landscape, sea scape, macro, etc.
C2 = Action. We define action as either shooter, subject, or both in motion.
C3 = HDR Auto Exposure Bracket. We use the bread and butter setting of 3 shots 2 E.V. apart.
(Since 50D shooters do not have C3, LIGHT recommends setting C1 to Action and C2 to HDR. The normal M setting is used for "portrait.")
It is fairly straightforward to set the custom user settings. LIGHT offers the following initial parameters. We will assume shooting RAW.
To set the C1 custom user setting. Switch the camera to Manual mode by turning the dial to M. Once in Manual, set the following:
-Evaluative Metering
-Auto White Balance (remember the custom mode is a baseline, you may switch if desired later.)
-One shot auto focus (AF)
-Single shot drive mode
-ISO 100
-Aperture = f/8 This is a baseline. You will, most likely, need to change aperture based upon your desired depth of field and shutter speed requirements.
-Shutter Speed = 1/250 This is a starting point. You will, most likely, need to change shutter speed to reach the desired exposure.
-Select center AF point
-Quality = RAW
-Color Space = Adobe RGB
-Picture Style = Neutral
Once the camera is configured per above (or with your own desired settings) do the following:
-Push Menu
-Navigate to the last "yellow" menu and highlight "Camera User Setting"
-Push the Set button inside the secondary control dial
-Highlight Register and push Set
-Highlight Mode dial : C1 and push Set
-Highlight OK and push Set
To set the C2 custom user setting we must first discuss how you shoot Action. If you are a Manual shooter set the modedial to M. If you are an Aperture priority shooter consider switching to Manual in the future and set the mode dial to Av.
Once in either M or Av set the parameters as above with the following changes.
-AI Servo AF
-Continuous or Continuous High drive mode
-Aperture = set maximum aperture (when configuring this C2 setting LIGHT recommends attaching your fastest lens so any other lens will always be at maximum aperture. For example, LIGHT's fastest lens is f/1.4 so our C2 default is 1.4. If you subsequently put a slower lens on it will default to it's maximum aperture.
-Shuter speed = 1/500 This is again a starting point.
-ISO = 1oo but consideration may be given to increasing to 200 to generate faster shutter speeds in lower light conditions.
Once the camera is configured per above, follow the same procedures as above when setting C1 with the exception of highlight C2 this time.
To set the C3 custom user setting set the mode dial to Manual. Configure exactly as C1 with the following exceptions.
-Continuous or continuous high drive mode.
-Enable Auto Exposure Bracketing (AEB) by pushing menu and navigating to the second "red" menu. Highlight Expo.comp./AEB and hit the set button. Move either the primary or secondary control dial (camera dependent) until the ticks are at -2 and +2. Hit the Set button.
Once the camera is configured per above, follow the same procedures as above when setting C1 and C2 with the exception of highlight C3 this time.
With all three custom user settings configured you are now just a quick mode dial turn or two away from rapidly swiching from portrait to action to HDR.
How about that for effective and efficient?
Fiat Lux!
Hal
Interesting Chandelier
Class Shooting at Madonna
A quick shot of part of the class shooting interior HDR at Madonna Inn in San Luis Obispo. I've found that a terrific way to master the theory and practice of shooting for high dynamic range source images is to shoot in a dark room with windows. The dynamic range typically exceeds the cookie cutter 3-shot standard (0, -2, and +2) forcing the photographer to shoot series of 3-shots using exposure compensation. A tremendous learning experience.
One of the students shot a 3 segment panorama with 6 component HDR images each this afternoon. During night lab he smoothly merged the components, tonemapped, and easily photomerged the resultant TIFFs into a beautiful interior HDR Pano! Nice work!
Fiat Lux!
Hal
We'll be shooting outside tomorrow to practice some more.
Jim Divitale Blog
http://divitalephotography.blogspot.com/
Monday Night Light Recap Video
Come check it out next Monday when we continue with a detailed description of output sharpening!
Fiat Lux!
HDR Guidelines Part 1
Shooting a scene with a dynamic range (DR) exceeding the capability of your sensor will either leave you with blown highlights or no shadow detail. Shooting multiple images to overcome the limitations of your sensor may, with sound processing, give you good highlights and shadow detail. When shooting multiple images try to ensure the exact same composition for each shot (to ensure optimum processing each pixel should match exactly!)
Different situations require more or less stability. For example, a series of bracketed shots taken with camera auto exposure bracketing (AEB) functionality and high shutter speeds may be hand held. For more challenging situations a sound tripod and ball head optimized as below will create a better series of source files.
-Use a STABLE tripod and head (a poor tripod is the number one equipment issue seen here at LIGHT.) The following tips may help make the tripod more stable.
-Lower legs
-Remove camera strap
-Mirror lockup (more on mirror lockup's efficiency or lack thereof later)
-Cable or wireless release
-If no release, use the camera’s self timer
Fun with Filters and Blend Modes
Jim DiVitale's Workshop is Incredible!
36 Shot HDR Panorama
Free Live Web Training Every Week only at LIGHT!
The seminars have been great and we are expanding the program with one change, every session of MNL is FREE, no catch, no hidden costs. All you need to do is sign up and tune in.
Every Thursday evening or Friday morning we will post the new link here on the LIGHT blog, via Twitter, and on our Facebook page (Light Photographic Workshops.) The sessions are limited to 1000 attendees so register early.
For the Twitter crowd follow LIGHT at www.twitter.com/LightWorkshops.
Click on the following link to register. After you register you will receive a confirmation email as well as reminders one day and one hour before the event.
https://www1.gotomeeting.com/register/154307416
Hope to see you online next Monday!
OBTW, next week's topic is creating an action to automate your luminance mask creation.
Fiat Lux!
Hal
Photo Focus Article
http://photofocus.com/2009/08/04/basic-stitched-panorama-guidelines-workflow/#comments
Fiat Lux!
Hal
Last Day Here in Maui
Hal