
Introduction
In previous tutorials, we discussed what the optimal shutter speed and aperture setting should be when we are shooting HDR photography. Now, we are going to discuss the optimal ISO setting. In HDR photography, we are combining multiple exposures to create one final HDR image. This process of combining exposures automatically creates certain challenges, one being the overall grain in the final HDR image. When you shoot at your camera’s lowest native ISO, you will still see a little bit of grain in your images. Because of this, always keep your ISO at the lowest native ISO on your camera whenever possible. For Canon users, the lowest native ISO is 100. For Nikon users, the lowest native ISO is around 160. In this article, we will discuss reasons why the optimal ISO setting in HDR photography is the lowest native ISO on your camera. In addition, we will also explain what native ISO means.
What is Native ISO?
Your camera has native ISO settings that are multiples of each other. On a Canon, like the Canon 5D Mark III below, the native ISO settings are 100, and then 200, 400, 800 and 1600.
On a Nikon, like the Nikon D800 below, the native ISO settings are 160, then 320, 640, and so forth.
Anything in between these native ISO settings are digitally enhanced settings. For example, at ISO 250, your Canon will take ISO 200 and digitally boost the overall brightness to create ISO 250. ISO 250 will actually yield more grain than if you were to shoot at ISO 400 and pull it down in post production. When you shoot at in-between values rather than going up to the next native ISO, it will reduce the overall image detail and dynamic range. Therefore, if you need to boost the ISO, always increase to the next native ISO setting.
For best HDR image results, stick with ISO 100 on a Canon or ISO 160 on a Nikon. If you need to boost up the ISO, you can go up to ISO 200 or ISO 400 (Nikon equivalence would be ISO 320 or ISO 640). However, before processing your image, you must first reduce the noise of the base images so that there is not too much noise in the final HDR image. ISO 400 is essentially the peak of yielding professional HDR images because at ISO 400, we have to do a significant amount of noise reduction before we process the images. Remember that when you are doing a bracketed sequence to shoot an HDR image, you are taking multiple images and layering them all on top of each other. This means that if you shot at ISO 400, your final HDR image will not look like it was shot at ISO 400 since you are essentially layering 3 times ISO 400 to create the final HDR image. Instead, your final HDR image may look like it was shot at ISO 1600, ISO 3200, or even ISO 6400. The image will basically be unusable unless we go in first and reduce the noise before we process the image. If you shoot at ISO 800 or ISO 1600, your final HDR image will turn out nowhere near what you want. This brings us to reasons why we need to shoot HDR images at the lowest native ISO setting.
#1: Loss of Detail
The first reason why we need to shoot HDR images at the lowest native ISO setting is pretty simple. When we raise the ISO, we introduce noise and grain into our images. Noise and grain will kill the detail in your image, especially when you need to layer multiple exposures to create that final HDR image.
#2: Reduction in Dynamic Range
When you raise the ISO, this will actually reduce the dynamic range in your images. At ISO 100 on a Canon 5D Mark III, we can capture around 12 stops of dynamic range. However, as ISO increases, the dynamic range is greatly reduced and we will no longer be able to capture the scene at 12 stops of dynamic range. Since we are shooting high dynamic range (HDR) photography, increasing your ISO basically defeats the purpose of shooting HDR images. Therefore, keep your ISO at the lowest possible native ISO setting to maximize detail, color and overall dynamic range in your HDR image.
#3: Limits Single-Shot HDRs
Another reason why you should shoot HDR images at the lowest native ISO setting is because you have even less leeway when shooting a single-shot HDR than when you are shooting a bracketed sequence. With single-shot HDR images, the best result you will get is from ISO 100 because we need to capture the entire tonal range within one single image. At ISO 100 on a Canon or ISO 160 on a Nikon, you are capturing the maximum dynamic range possible within that one single photograph, which is the point of a single-shot HDR. At ISO 200, it starts to limit the overall detail and dynamic range of your single-shot HDR image. At ISO 400, it will be impossible to pull back all the tonal range in your single-shot HDR image because you have lost too much detail to begin with. Therefore, with single-shot HDR images, it is crucial to shoot at the lowest possible native ISO.
Conclusion
Remember that when you increase your ISO, you are not only increasing grain, but also reducing the dynamic range in your HDR image. The whole purpose of shooting HDR photography is to increase dynamic range, so adjusting up the ISO is going to decrease the quality of your HDR images. Whenever possible, keep your ISO at the lowest native value that your camera offers. This will yield the best HDR images because it will preserve the most detail and color. If you are not using a Nikon or Canon, just look in your manual or check online to see what the lowest possible native ISO setting is on your camera. More likely than not, it will be around ISO 100 to ISO 200.
CHAPTER 1: INTRODUCTION TO HDR
- 1.1 – Introduction to HDR
- 1.2 HDR Workshop Introduction
- 1.3 What is HDR?
- 1.4 What is a Stop of Light
- 1.5 Boosting Dynamic Range by Combining Exposures
- 1.6 When Do You Really Need to Shoot HDR Images
- 1.7 Improvements in Technology
- 1.8 Installing the Presets
- 1.9 – What you will Need for HDR Photography
- 1.10 – Tripod
- 1.11 – Remote Shutter Release
- 1.12 –Lens Filter
- 1.13 – Memory Cards
- 1.14 – Backpack
- 1.15 – UNDFIND Bag
- 1.16 – Laptop
- 1.15 – HDR Software
CHAPTER 2: HDR CAMERA SETTINGS
- 2.1 – HDR Camera Settings Introduction
- 2.2 – What is Auto Exposure Bracketing
- 2.3 – How Many Exposures Do You Really Need
- 2.4 – Changing Your Cameras Bracketing Order
- 2.5 – Ceteris Paribus (Shutter Speed Changes)
- 2.6 – Capture All Shots by Shooting in Continuous Modes
- 2.7 – Camera Modes
- 2.8 – Metering Modes
- 2.9 – Timer
- 2.10 – Setting the Correct Median Exposure
- 2.11 – Nailing and Locking the Focus
- 2.12 – In-Camera HDR
- 2.13– In-Camera HDR
CHAPTER 3: HDR CONSIDERATIONS
- 3.1 – HDR Considerations Intro
- 3.2 – Using a Tripod
- 3.3 – Optimal Shutter Speedl
- 3.4 – Optimal Aperture Settings
- 3.5 – Optimal ISO Settings
- 3.6 –Moving Objects and Ghosting
- 3.7 – Using DSLRs with Faster Frame Rates
- 3.8 – Using Mirror Up Mode-Mirror Lockup
- 3.9 – Shooting in RAW vs. JPEG
- 3.10 – Macro Mode with Food Photography
- 3.11 – Clean Your Lenses & Sensor!
- 3.12 – Don’t Forget the Photographic Composition
CHAPTER 4: SALTON SEA, CA
- 4.1 – Salton Sea, CA HDR Introduction
- 4.2 – Salton Sea HDR | Pt.1| How it was Shot
- 4.3 – Salton Sea HDR | Pt.2| RAW preparation and HDR Export
- 4.4 – Salton Sea HDR | Pt.3| HDR Processing
- 4.5 – Salton Sea HDR | Pt.4| RAW Processing and Photoshop Import
- 4.6 – Salton Sea HDR | Pt.4| Photoshop Layer
- 4.7 – Salton Sea HDR | Pt.6| Final Image Processing
Chapter 5: PAGE, AZ
- 5.1 – Page, Arizona HDR Introduction
- 5.2 Horseshoe Bend HDR |Pt.1| How it Was Shot
- 5.3 Horseshoe Bend HDR |Pt.2| RAW Preparation and HDR Export
- 5.4. Horseshoe Bend HDR | Pt.3| HDR Processing in Photomatix Pro
- 5.5 Horseshoe Bend HDR |Pt.4| RAW Processing and Adobe Photoshop Import
- 5.6 Horseshoe Bend HDR |Pt.5| Photoshop Layer Blending
- 5.7 Horseshoe Bend HDR |Pt.6| Final Image Processing
- 5.8. Antelope Canyon HDR |Pt.1| How it Was Shot
- 5.9 Antelope Canyon HDR |Pt.2| RAW Preparation and HDR Export
- 5.10 Antelope Canyon HDR |Pt.3| HDR Processing
- 5.11– Antelope Canyon HDR |Pt.4| Final Image Processing
- 5.12 – Antelope Canyon HDR |Pt.5| RAW Processing and Photoshop Import
- 5.13 Antelope Canyon HDR |Pt.6| Final Image Processing
Chapter 6: MOAB, UT
- 6.1 Moab, Utah HDR Introduction
- 6.2 Moab Utah HDR |Pt.1| How it Was Shot
- 6.3 Moab Utah HDR | Pt.2| RAW Preparation and HDR Export
- 6.4 Moab Utah HDR |Pt.3| HDR Processing
- 6.5 Moab Utah HDR |Pt.4| Processing and Photoshop Import
- 6.6 Moab Utah HDR |Pt.5| Photoshop Layer Blending
- 6.7 Moab Utah HDR |Pt.6| Final Image Processing
Chapter 7: SALT LAKE CITY, UT
- 7.1 Salt Lake Union Pacific HDR Location
- 7.2 Salt Lake Union Pacific HDR |Pt.1| How it Was Shot
- 7.3 Salt Lake Union Pacific HDR |Pt.2| RAW Preparation and HDR Export
- 7.4 Salt Lake Union Pacific HDR |Pt.3| HDR Processing
- 7.5 Salt Lake Union Pacific HDR |Pt.4| RAW Preparation and HDR Export
- 7.6 Salt Lake Union Pacific HDR |Pt.5| Photoshop Layer Blending
- 7.7 Salt Lake Union Pacific HDR |Pt.6| Final Image Processing
- 7.8 Salt Lake City HDR Introduction
- 7.9 Salt Lake LDS Temple HDR |Pt.1| How it Was Shot
- 7.10 Salt Lake LDS Temple HDR |Pt.2| RAW Preparation and HDR Export
- 7.11 Salt Lake LDS Temple HDR |Pt.3| HDR Processing
- 7.12 Salt Lake LDS Temple HDR |Pt.4| RAW Processsing and Photoshop Import
- 7.13 Salt Lake LDS Temple HDR |Pt.5| Photoshop Layer Blending
- 7.14 Salt Lake LDS Temple HDR |Pt.6| Final Image Processing
- 7.15 Salt Lake Capital HDR |Pt.1| How it Was Shot
- 7.16 Salt Lake Capital HDR |Pt.2| RAW Preparation and HDR Export
- 7.17 Salt Lake Capital HDR |Pt.3| HDR Processing
- 7.18 Salt Lake Capital HDR |Pt.4| RAW Processing and Photoshop Import
- 7.19 Salt Lake Capital HDR |Pt.5| Photoshop Layer Blending
- 7.20 Salt Lake Capital HDR |Pt.6| Final Image Processing
Chapter 8: SALT LAKE MOUNTAINS, UT
- 8.1 Salt Lake Mountains HDR Introduction
- 8.2 Heber Valley Fishing Bracketed HDR |Pt.1| How it Was Shot
- 8.3 Heber Valley Fishing Bracketed HDR |Pt.2| RAW Preparation and HDR
- 8.4 Heber Valley Fishing Bracketed HDR |Pt.3| HDR Processing
- 8.5 Heber Valley Fishing Bracketed HDR |Pt.4| RAW Processing and Photoshop Import
- 8.6 Salt Lake Union Pacific HDR |Pt.5| Photoshop Layer Blending
- 8.7 Heber Valley Fishing Bracketed HDR |Pt.6| Final Image Processing
- 8.8 Heber Creeper Train HDR |Pt.1| How it Was Shot
- 8.9 Salt Lake LDS Temple HDR |Pt.1| How it Was Shot
- 8.10 Heber Creeper Train HDR |Pt.3| HDR Processing
- 8.11 Heber Creeper Train HDR |Pt.4| RAW Processing and Photoshop Import
- 8.12 Heber Creeper Train HDR |Pt.2| RAW Preparation and HDR Export
- 8.13 Heber Creeper Train HDR |Pt.6| Final Image Processing
- 8.14 Uinta Summit Panorama HDR |Pt.1| How it was Shot
- 8.15 Uinta Summit Panorama HDR |Pt.2| Single Shot Faux HDR Processing
- 8.16 Uinta Summit Panorama HDR |Pt.3| Photoshop Panorama Processing
- 8.17 Uinta Summit Panorama HDR |Pt.4| Final Image Processing
Chapter 9: BRYCE & ZION, UT
- 9.1 Bryce Canyon HDR Introduction
- 9.2 Bryce Canyon HDR |Pt.1| How it Was Shot
- 9.3 Bryce Canyon HDR |Pt.2| RAW Preparation and HDR Export
- 9.4 Bryce Canyon HDR |Pt.3| HDR Processing
- 9.5 Bryce Canyon HDR |Pt.4| RAW Processing and Photoshop Import
- 9.6 Bryce Canyon HDR |Pt.5| Photoshop Layer Blending
- 9.7 Bryce Canyon HDR |Pt.6| Final Image Processing
- 9.8 Road Side Panorama HDR |Pt.1| How it was Shot
- 9.9 Salt Lake LDS Temple HDR |Pt.1| How it Was Shot
- 9.10 Road Side Panorama HDR |Pt.3| Photoshop Panorama Processing
- 9.11 Road Side Panorama HDR |Pt.4| Final Image Processing
- 9.12
Zion River HDR |Pt.1| Location - 9.13 Zion River HDR |Pt.2| How it was Shot
- 9.14
zion River HDR |Pt.3| RAW Preparation and HDR Export - 9.15 Zion River HDR |Pt.4| HDR Processing
- 9.16 Zion River HDR |Pt.5| RAW Processing and Photoshop Import
- 9.17 Zion River HDR |Pt.6| Photoshop Layer Blending
- 9.18 Zion River HDR |Pt.7| Final Image Processing
Chapter 10: LAS VEGAS, NV & LOS ANGELES, CA
- 10.1 Las Vegas and Los Angeles HDR Introduction
- 10.2 Las Vegas Aria HDR |Pt.1| How it Was Shot
- 10.3 Las Vegas Aria HDR |Pt.2| RAW Preparation and HDR Export
- 10.4 Las Vegas Aria HDR |Pt.3| HDR Processing
- 10.5 Las Vegas Aria HDR |Pt.4| RAW Processing and Photoshop Import
- 10.6 Las Vegas Aria HDR |Pt.5| hotoshop Layer Blending
- 10.7 Las Vegas Aria HDR |Pt.6| Final Image Processing
- 10.8 Downtown Los Angeles HDR |Pt.1| How it was Shot
- 10.9 Downtown Los Agneles HDR |Pt.2| Single Shot Faux HDR Processing
Chapter 11: BONUS
- 11.1 Heber Creeper Train HDR
- 11.2 Heber Valley Fishing SIngle Shot HDR
- 11.3 Uinta Summit Bracket HDR
- 11.4 Bryce Canyon Panorama HDR
- 11.5 Zion Entrance Panorama HDR
- 11.6 Las Vegas Cleveland Clinic HDR
- 11.7 Palos Verdes HDR
- 11.8 Shen Zhen Pier HDR
- 11.9 China Street Photography HDR
- 11.10 Stearns Wharf HDR
Total Course Run Time: 13H 6M 50S
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