I. Understanding Infrared Photography
* What is Infrared? Infrared light is beyond the visible spectrum, with wavelengths longer than red.
* Why Infrared for Black and White Landscapes? IR photography creates surreal, dreamlike images with striking black and white contrasts. Foliage reflects IR light strongly, rendering it bright white, while the sky and water often appear dark and dramatic. This creates a unique ethereal look.
* IR Pass Filters: These filters block visible light and allow only IR light to reach the sensor. They are used *after* conversion to fine-tune the IR effect.
II. Methods of Achieving Infrared Black and White Photography
There are three primary ways to capture IR images:
1. Using an IR Pass Filter on an Unmodified Camera:
* Pros: Simplest and cheapest way to start. No permanent modification.
* Cons: Requires very long exposures (several seconds or minutes) because the camera's internal IR filter significantly blocks IR light. Hotspots (a bright spot in the center of the image) are very common and often difficult to correct. Image quality is generally lower due to the attenuated signal. Not ideal for moving subjects or handheld shooting.
* Suitable Cameras: Some cameras are better than others. Look for cameras with weak internal IR cut filters (research specific models). Older DSLR models sometimes perform better than newer ones. Mirrorless cameras are often a poor choice for this method because of their strong internal filtering.
* Process:
* Mount a very dense IR pass filter (e.g., 720nm, 850nm) on your lens.
* Use a tripod.
* Set your camera to manual mode.
* Dial in a very long exposure time (start with several seconds and adjust based on the histogram).
* Use a wide aperture for focusing but stop down to improve sharpness (f/8 to f/11).
* White balance can be tricky. Some cameras may struggle.
* Take a test shot and adjust exposure as needed.
2. Full-Spectrum Conversion:
* What it is: The camera's internal IR cut filter is *removed* and replaced with clear glass. This allows *all* light (visible and infrared) to reach the sensor. You then use IR pass filters *on the lens* to block the visible light.
* Pros: Increased light sensitivity compared to using an IR filter on an unmodified camera. Faster shutter speeds are possible. More versatile – you can use different IR filters for varying effects or attach a visible light filter to shoot normal color images.
* Cons: Requires careful white balance adjustment, and a good understanding of post-processing is essential. Lens hotspots can still be a problem with some lenses, depending on the filter used. Can be more expensive than a simple IR filter, especially if you pay a professional.
* How it works: The internal IR filter is replaced, making the camera sensitive to a wider range of light. External IR filters are now the primary method for blocking visible light.
* Process:
* Have your camera professionally converted to full-spectrum (highly recommended).
* Attach an IR pass filter to your lens (e.g., 720nm, 850nm, 590nm for different effects).
* Set your camera to manual mode.
* Adjust exposure and aperture as needed. Shorter exposures are usually possible compared to using an IR filter on an unmodified camera.
* White Balance: This is crucial. Take a custom white balance reading using a green piece of foliage *under direct sunlight* before each shooting session. This gives you a much better starting point for post-processing. Some cameras have a dedicated custom white balance setting for IR.
3. Dedicated Infrared Conversion:
* What it is: The camera's internal IR cut filter is *replaced* with an *IR pass filter*. This makes the camera *only* sensitive to infrared light within a specific wavelength range.
* Pros: Optimized for IR photography. Best image quality for IR. No need for external filters to block visible light (except for fine-tuning the IR effect). Often produces the cleanest IR images with the least amount of post-processing needed.
* Cons: Camera is *only* useful for IR photography. Cannot be used for regular color photography. Most expensive option.
* How it works: A specific IR pass filter is placed directly on the sensor.
* Process:
* Have your camera professionally converted. Choose the desired IR wavelength (e.g., 720nm, 850nm).
* Exposure settings are similar to normal photography (adjust as needed).
* White balance can be set to "custom" using green foliage or a gray card in sunlight.
* Capture images and post-process.
III. Choosing the Right Conversion Method
* Budget: An IR pass filter is the cheapest entry point, but the results will be limited.
* Versatility: Full-spectrum conversion is the most versatile, allowing for both IR and regular photography (with the appropriate filters).
* Image Quality and Ease of Use: Dedicated IR conversion provides the best image quality and the simplest workflow, but sacrifices the camera's ability to shoot normal color images.
* Experience: Start with an IR pass filter on an unmodified camera to get a feel for IR photography. If you enjoy it, consider a full-spectrum or dedicated IR conversion.
IV. Camera Selection
* Older DSLRs: Often perform better than newer cameras because they have weaker internal IR cut filters. Research specific models known for good IR performance.
* Mirrorless Cameras: Many mirrorless cameras have very strong IR cut filters, making them unsuitable for infrared photography *without conversion*. After conversion, they can perform very well.
* Sensor Size: Full-frame sensors generally provide better image quality and dynamic range than crop sensors.
* Live View: Essential for focusing, especially with long exposures.
* Custom White Balance: A must-have feature.
V. Lens Selection
* Lens Hotspots: Some lenses exhibit a bright spot in the center of the image when used for IR photography. This is called a hotspot. Research lens compatibility for IR photography *before* choosing a lens. Forums and online resources often have lists of lenses known to produce hotspots.
* Wide-Angle Lenses: Popular for landscape photography and work well for IR.
* Fast Aperture: Helpful for focusing in low light conditions.
* Sharpness: A sharp lens is crucial for capturing detail.
* Manual Focus: While autofocus can work sometimes, manual focus is often necessary for precise focusing in IR.
VI. Essential Accessories
* Tripod: Essential for long exposures when using an IR pass filter on an unmodified camera.
* IR Pass Filters: Choose a filter based on the desired effect (e.g., 720nm for a classic IR look, 850nm for a more extreme effect).
* Gray Card or Green Foliage: For setting a custom white balance.
* Lens Cleaning Supplies: Keep your lenses and filters clean.
* Remote Shutter Release: Minimizes camera shake during long exposures.
VII. Shooting Techniques
* Shoot in RAW: Provides the most flexibility for post-processing.
* Metering: Your camera's meter may be inaccurate in IR light. Use the histogram to ensure proper exposure. Overexpose slightly to bring out detail in the shadows.
* Focusing: Infrared light focuses at a slightly different point than visible light. Use live view and magnify the image to achieve precise focus. If your lens has an IR focusing mark, use that to fine-tune the focus after autofocusing (if possible).
* Weather Conditions: Sunny days with puffy clouds are ideal for IR photography. The clouds will create dramatic contrast in the sky.
* Time of Day: Midday is generally the best time for IR photography because the sun is high in the sky and the IR light is strongest.
* Subjects: Focus on subjects that reflect IR light well, such as foliage, clouds, and water.
VIII. Post-Processing
Post-processing is *essential* for IR black and white photography.
* RAW Conversion:
* Adjust white balance. If you didn't get a perfect white balance in-camera, experiment with the white balance sliders to find a pleasing look.
* Adjust exposure, contrast, highlights, and shadows.
* Reduce noise.
* Correct lens distortions.
* Black and White Conversion:
* Use a dedicated black and white conversion tool (e.g., Adobe Lightroom's B&W panel, Nik Silver Efex Pro).
* Experiment with the color sliders to control the tonality of different areas of the image. For example, adjust the green slider to brighten foliage.
* Dodging and Burning: Use dodging and burning to selectively lighten and darken areas of the image to create contrast and emphasize detail.
* Sharpening: Sharpen the image to bring out detail.
* Hotspot Removal: If you have a hotspot, use a cloning or healing tool to remove it. The radial filter in Lightroom can be useful for subtle corrections.
IX. Safety Precautions
* Camera Conversion: Converting a camera is a delicate process. It is *highly recommended* to have it done professionally. Improper handling can damage the sensor and other internal components.
* Eye Safety: While not as intense as other forms of radiation, prolonged exposure to strong IR light *can* potentially cause eye strain or discomfort. Avoid directly staring at very bright IR light sources. The IR light emitted by the camera's sensor is not harmful.
X. Recommendations for Starting Out
1. Start with an IR pass filter on your existing camera to experiment and see if you enjoy IR photography. This is the least expensive option.
2. Research lens compatibility for hotspots. Choose lenses that are known to perform well with IR photography.
3. Learn about post-processing techniques for IR images.
4. If you enjoy IR photography, consider a full-spectrum conversion to improve image quality and versatility.
5. If you are serious about IR photography, consider a dedicated IR conversion for the best possible results.
By understanding the principles of IR photography, choosing the right equipment, and mastering post-processing techniques, you can create stunning black and white landscape images that showcase the hidden beauty of the infrared world. Good luck!