Part 1 – Why Infrared Portraits Are Different

When most photographers think of portraiture, they consider how visible light interacts with skin, hair, and fabrics. Infrared (IR) photography, however, unlocks a different spectrum—one that renders familiar human features in surprising and often ethereal ways. In this section, we’ll cover:

1. How IR Light Interacts with Human Faces

2. Key Differences Between IR and Visible‐Light Portraiture

3. Why Choose Nikon for IR Portrait Work?

1. How IR Light Interacts with Human Faces

• Skin Reflectance: Human skin reflects infrared light differently than visible light. Under an IR filter (typically 720 nm or higher), skin often appears smoother and more luminous—fine lines, blemishes, and pore textures are subdued as IR penetrates slightly beneath the surface.

• Veins and Subsurface Detail: Because IR can penetrate into the dermal layers, veins and subsurface structures may become more pronounced. This can produce subtle “vein glow” or texture in areas of thinner skin (around the eyes or temples).

• Hair and Eyewear: Dark hair can appear nearly opaque, while lighter or graying strands may glow. Glasses lenses block some IR wavelengths, often producing reflections or areas of uneven exposure around the eyes.

Tip: Always inspect through live view or perform a quick test shot when first working with a subject in IR. What looks natural in visible light can transform dramatically under an IR-pass filter.

2. Key Differences Between IR and Visible-Light Portraiture

1. Focus Shift:

   • In visible‐light mode, Nikon’s autofocus system is calibrated for wavelengths between roughly 400–700 nm. IR light focuses at a slightly different plane, so if you attempt to autofocus under an IR filter (or on a converted body), images will often be soft unless you compensate.

   • Solution: Use Live View with 10× or 20× magnification to manually fine‐tune focus under the IR filter—or rely on a pre-calibrated focus-shift chart if you routinely shoot a specific Nikon body + lens + filter combination.

2. Exposure Calculation & Metering:

   • Nikon’s TTL metering and built-in light meters assume visible-light reflectance. When an IR-pass filter (e.g., 720 nm) blocks most visible wavelengths, the camera’s meter under-reads. This means you must add significant exposure compensation (often +3 EV or more) or switch fully to manual mode.

   • Tip: Perform a quick bracketed test on the subject’s face to determine the “sweet spot” (often around 15–30 seconds at f/5.6 in bright sun with ISO 100, depending on filter strength).

3. Color vs. False-Color vs. Monochrome:

   • Under IR, skin can appear pink, magenta, or near-white, depending on the filter cutoff. Many IR shooters embrace “false-color” workflows—swapping red and blue channels to achieve pastel skin and deep blue skies. Others convert directly to black & white, emphasizing contrast between skin and background.

   • Consideration: Human faces under IR rarely map to natural skin tones. If you want realistic skin hues, you’ll need specialized post-processing or even dual-sensor setups—both of which exceed most Nikon-based IR workflows.

4. Lighting & Contrast:

   • In visible-light portraiture, softboxes or reflectors help control contrast and model the face. In IR, however, broad daylight often produces strong IR reflectance from skin and eyes, while shadows can appear almost black.

   • Approach: Embrace high-contrast IR looks—have your subject face open sky (for even catchlights) or position them so that hair and accessories produce stark silhouettes against foliage that glows white.

Bottom Line: Infrared portraiture is not simply “waiting for the sun” and then shooting as you would in visible light. You must rethink focus, exposure, and the very notion of “skin tone” because IR light interacts with human faces in fundamentally different ways.

3. Why Choose Nikon for IR Portrait Work?

• Full-Frame Advantage: Nikon full-frame bodies (D850, D810, D750) offer excellent IR sensitivity and dynamic range—key for preserving tonal detail in both highlights (skin) and shadows (hair, background).

• Mirrorless Flexibility: Nikon Z6/Z7 series (after conversion to full-spectrum or direct IR) provide an EVF that accurately previews IR exposure. This simplifies manual focus and framing compared to optical viewfinders.

• Lens Ecosystem: Nikon’s robust lens lineup—from classic 85 mm f/1.8 G for tight headshots to 35 mm f/1.8 G for environmental portraits—covers every IR portrait need. Many Nikon lenses exhibit minimal hotspot behavior (bright central glare) when used with IR-pass filters, which keeps skin tones smooth.

Part 2 – Gear and Setup for Nikon IR Portraits

Creating compelling IR portraits hinges on both the camera configuration and the accessories you choose. In this section, we’ll explore:

1. Picking the Right Nikon Body

2. Why Conversion vs. External Filters Matters

3. Lens Recommendations & Hotspot Awareness

4. Essential Accessories (Tripod, Reflectors, Gels)

1. Picking the Right Nikon Body

1. Converted vs. Unconverted Bodies:

   • Unconverted Nikon + External IR Filter (e.g., 720 nm):

     • Pros: You can switch between regular and IR photography simply by removing the filter.

     • Cons: Slow exposures in bright sun often exceed 15 seconds; cumbersome to compose/preview focus because the optical viewfinder shows a darkened scene under an IR filter.

   • Professionally Converted Nikon (e.g., D810 with 720 nm Internal Filter):

     • Pros: The hot mirror (IR-blocking filter) is replaced with a dedicated IR-pass filter over the sensor—this yields much higher IR transmission. Shutter speeds drop into the 1–5 second range for bright daylight. EVF or rear-LCD preview is almost passable under IR.

     • Cons: You lose the ability to shoot normal visible-light images unless you use front-mounted filters (e.g., a variable ND). Conversion costs range from $300–$500, depending on wavelength and service.

2. Recommended Nikon Bodies for IR Portraiture:

   • Nikon D850 (Converted to 720 nm or Full-Spectrum):

     • Advantages: 45 MP resolution captures subtle facial details in IR. Excellent dynamic range helps preserve highlight detail on skin even under strong IR reflectance.

     • Considerations: Large files require powerful computers for post-processing; battery life in Live View (under IR) can be shorter.

   • Nikon Z6 (Full-Spectrum Conversion, 590 nm–1000 nm):

     • Advantages: Mirrorless EVF gives a clearer IR preview—not perfect, but sufficient to nail composition and focus. Z6’s IBIS (in-body stabilization) can help with shorter IR exposures.

     • Considerations: Must add a front-mounted IR-pass filter to block visible light if converted to full-spectrum; otherwise, use a converted 720 nm Z6.

   • Nikon D750 (Converted to 720 nm):

     • Advantages: Slightly less expensive on the used market; great high-ISO performance reduces noise at longer IR exposures.

     • Considerations: EVF preview is absent—you rely on the rear LCD for focus confirmation (slightly slower than mirrorless).

Tip: If you already shoot Nikon and want a quick IR test, mount a 720 nm filter (Hoya R72, B+W 093) on any FX body, set ISO 100, f/5.6, and expose for 15–20 seconds under bright sun—then view the resulting RAW in Nikon NX Studio with a custom white balance set on a gray card under the filter.

2. Conversion vs. External Filters

• External IR Filters (e.g., 720 nm, 850 nm):

  • Screw-on filters are available in 52 mm–82 mm thread sizes. They’re affordable ( $40–$100) but force very long shutter speeds, especially if your scene lacks bright IR light (e.g., indoor or shade).

  • Since you must compose through a darkened finder/LCD, focusing can be challenging; live histogram or focus-peaking (with mirrorless) helps.

• Professional Conversion Services:

  • Kolari Vision: Offers internal IR conversions for Nikon D and Z series at specific cut-off wavelengths (commonly 590 nm, 720 nm, 850 nm). Their 720 nm conversion is popular for a classic IR look (bright foliage, smooth skin).

  • LDP LLC (IRreCams): Specializes in 630 nm and 720 nm conversions for Nikon bodies, often retaining higher visible light for creative false-color options.

  • What To Expect from Conversion:

    • Removal of the stock hot-mirror that blocks IR.

    • Installation of a new internal IR-pass filter (e.g., 720 nm).

    • Calibration to ensure the sensor’s IR coverage is uniform (reducing hotspots).

    • After conversion, the camera can only see IR (unless you add a visible-light filter at the front), so you’ll need to use a separate camera or swap bodies for normal visible-light work.

3. Lens Recommendations & Hotspot Awareness

Infrared light behaves differently through glass elements, and many lenses produce a bright “hotspot” at the center—an artifact where the IR filter stack interacts with the lens coatings.

• Best Nikon Lenses for IR Portraiture (Minimal Hotspots):

  • Nikon 85 mm f/1.8 G: Portrait-friendly focal length; at f/2.8–f/5.6, hotspot artifacts are negligible. Produces creamy backgrounds and beautiful subject–background separation.

  • Nikon 35 mm f/1.8 G: Ideal for environmental IR portraits—presents an expansive view of background scenery that “glows.” Hotspots are minimal when stopped down to f/4–f/5.6.

  • Nikon 50 mm f/1.8 G: Affordable, lightweight, and fairly hotspot-free at moderate apertures (f/5.6+). Good for head-and-shoulders or waist-up framing.

• Vintage/Non-Nikon Lenses (Worth Testing):

  • Nikkor Series-E 100 mm f/2.5: Known for pleasing bokeh and low IR hotspot behavior, though no VR means you’ll need a steady hand or tripod.

  • Third-Party Primes (e.g., Sigma Art Series): Many third-party lenses produce hotspots in IR—test extensively at various apertures before committing to a shoot.

Hotspot Mitigation Strategies:

• Shoot at f/5.6–f/8 when possible (wide apertures tend to exacerbate IR hotspots).

• If you see a faint bright circle cropping up on dark backgrounds (hair, clothing), dial aperture up or down a stop and test again.

• In post-processing, mild radial filters or spot-healing brushes can tone down residual shine, but prevention in‐camera is ideal.

4. Essential Accessories

• Sturdy Tripod & Remote Release:

  • Even with conversions that shorten exposures, IR portraits often still require 1–5 seconds at f/2.8–f/5.6. A solid tripod and a cable or wireless remote release will eliminate camera shake.

• Reflectors & Diffusers:

  • Although IR light is abundant in bright sun, using a silver or white reflector can fill in harsh facial shadows (IR reflectance from skin is directional). A translucent diffuser can help soften direct sun, preventing blown-out IR highlights on hairlines or crowns.

• IR-Pass Gels for Off-Camera Flash (Optional):

  • For indoor or low-light IR portraits, you can modify a speedlight with a 720 nm gel (taped over the head). This provides a short burst of IR without emitting any visible light. It’s possible to freeze motion and maintain low ISO, but output is limited—plan your power settings carefully.

• Custom White Balance Tool (e.g., IR Gray Card):

  • A standard gray card in visible light won’t register correctly under an IR filter. Purchase or print a “neutral IR card” (often a specially coated white tile or milky-white acrylic) to set an accurate in-camera WB. This simplifies RAW conversion later and reduces aggressive color shifts.

Part 3 – Shooting Techniques and Settings

With the right gear in place, capturing compelling IR portraits requires tailored camera settings, compositions, and on-the-fly decision-making. Here we’ll cover:

1. Manual Exposure & Metering Under IR

2. Focus Strategies for Sharp Eyes

3. Compositional Considerations

4. Lighting and Time-of-Day Tips

1. Manual Exposure & Metering Under IR

• Why Auto Modes Fail:

  • Even if you switch to Aperture Priority, Nikon’s meter will under-read—most in-camera meters cannot “see” IR. This leads to underexposed faces (often rendered as dull gray).

• Recommended Workflow:

  1. Switch to Manual Mode: Set ISO 100 (low to reduce noise), choose aperture around f/2.8–f/5.6 (for shallow depth of field), and then select a shutter speed based on tests.

  2. Bracket Exposure: On a sunny day, start with 5 seconds at f/4, ISO 100 (with a 720 nm filter) and review the histogram. Increase or decrease shutter speed until the histogram centers on midtones for the subject’s face.

  3. Final Adjustment: Once you find a pleasing exposure (skin bright but not clipped), lock it in. Minor adjustments (±½ stop) can be made between frames if the subject moves slightly into shadows or highlights.

Pro Tip: Some Nikon bodies (notably converted Z6/Z7) allow you to see a live histogram in Live View. Use this to dial in exposure without relying on guesswork.

2. Focus Strategies for Sharp Eyes

• Live View Magnification:

  • Engage Live View, zoom in 10× or 20× on the subject’s eye, and manually adjust focus until you see eyelashes or iris detail crisp. This bypasses autofocus errors under IR.

• Focus-Shift Charts:

  • Print an IR focus chart (available online) and mount it at a 45° angle. At your chosen shooting distance (e.g., 5 feet), manually focus on the chart, then note how much you adjusted from the camera’s autofocus marking. Once you know the offset for a given lens and aperture, you can thumb-mark or remember it for quick field focusing.

• Aperture & Depth of Field:

  • While wide-open apertures (f/1.8–f/2.8) create pleasing bokeh, IR images can exaggerate softness if focus misses. Consider f/4–f/5.6 for portraits: enough background separation, but forgiving depth of field to mask slight focus errors.

3. Compositional Considerations

• Background Selection:

  • Foliage under IR “blossoms” into brilliant whites. Position your subject so that trees, grass, or shrubs frame them—this high-contrast white background makes face and eyes pop against a surreal glow.

  • Urban settings (brick walls, asphalt roads) often appear dark gray or black under IR. For a gritty, high-contrast look, place your sitter against these darker backdrops.

• Skin vs. Clothing:

  • Certain fabrics reflect IR more than others. Cotton or linen (light colors) may glow similarly to skin, potentially washing out the subject’s silhouette. Instruct your subject to wear medium-toned or dark fabrics (navy, burgundy) to preserve separation.

• Expression & Posing:

  • Because IR accentuates subtle expressions (eye highlights become more pronounced, fine lines soften), encourage soft smiles or gentle gaze directions. The ethereal glow of skin under IR can emphasize mood, so lean into contemplative or dreamy expressions rather than bold, high-energy poses.

Creative Twist: For a “ghostly” IR portrait, have the subject close their eyes or look slightly downward—without catchlights in the eyes, the bright skin and dark eye sockets create an otherworldly, spectral feel.

4. Lighting and Time-of-Day Tips

• Midday Sun for Maximum IR Reflectance:

  • Between 11 AM–2 PM, the sun’s IR output peaks. In full sun, leaves and skin both reflect abundant IR. Expect faster shutter speeds (3–8 seconds at ISO 100, f/4 with a 720 nm filter).

  • Caution: Direct overhead sun can create harsh shadows under the nose and eyes. Use a small reflector or handheld diffuser to soften under-chin shadows.

• Overcast or Soft Light for Moodier Portraits:

  • Clouds filter visible light more than IR. On an overcast day, foliage still reflects IR but at lower intensity. Portraits taken under soft light often have more balanced contrast—skin glows gently, and backgrounds remain slightly darker.

  • Ideal for Indoor IR: If you must shoot indoors, position your subject next to a large window with direct sun (then block visible light with a 720 nm gel on the window or mount an IR LED panel).

Flash + IR-Pass Gel Technique (Low Light):

• Mount a 720 nm gel over your speedlight. Use it on low-power settings (1/16 or 1/32) at a moderate distance (3–6 feet) to produce a quick IR burst. This helps freeze subject motion at ISO 100–200.

• Be mindful that gel efficiency is limited—some IR-gel conversions allow only 10 % of visible flash output to pass as IR. You may need to bump ISO to 400 if subject motion or distance increases.

Part 4 – Post-Processing Workflow for IR Portraits

Capturing a technically sound IR portrait is only half the story. Effective post-processing unlocks the true “magic” of IR by translating raw sensor data into final tonality and color. In this section, we’ll cover:

1. Raw Conversion & White Balance

2. Channel-Swap vs. Black & White Pathways

3. Addressing Hotspots and Artifacts

4. Retouching Considerations for Skin

1. Raw Conversion & White Balance

• Importing RAW Files: Use either Nikon NX Studio (free) or Adobe Camera Raw/Lightroom to open your .NEF files.

• Custom IR White Balance:

  1. Prior to shooting, place a neutral IR gray card (or white tile) under the IR filter and meter the card.

  2. In RAW, use the eyedropper on that card (which often appears magenta or pink) to set a custom WB around 2500 K–3000 K.

  3. This baseline prevents extreme color casts, making subsequent color edits easier.

• Exposure Tweaks: Adjust shadows and highlights so that skin is bright but still contains texture (avoid clipped whites). Pull down highlights if necessary to preserve detail around facial features.

2. Channel-Swap vs. Black & White Pathways

1. Channel-Swap (False-Color IR):

   • Purpose: Create surreal, colorshifted portraits—skin tones turn pastel peach or mint, skies (if visible) become deep blues or purples, and vegetation glows white or green.

   • Workflow (Lightroom/Photoshop):

     1. In Lightroom’s Develop module, register a Profile for IR RAW (if available) or use a generic IR camera profile.

     2. In Photoshop:

        • Go to Image → Adjustments → Channel Mixer.

        • Swap Red → Blue and Blue → Red (set Red Output Channel: R= 0.0, G= 0.0, B= 100.0; Blue Output Channel: R= 100.0, G= 0.0, B= 0.0).

        • Leave Green at default (R= 0.0, G= 100.0, B= 0.0).

        • Fine-tune sliders to taste (e.g., Red Output +10 Green, B Output −10 Green) until skin looks luminous yet natural in its new palette.

   • Result: Faces appear soft pink or mint; hair/hats become dark blues; fabrics can shift to unexpected hues—perfect for artistic IR portraiture.

2. Black & White IR:

   • Purpose: Emphasize contrast between glowing skin, dark hair, and foliage. Produces a classic, timeless IR portrait look.

   • Workflow (Lightroom/Photoshop):

     1. In Lightroom, convert to Black & White.

     2. Use the B&W sliders to boost reds (skin highlights) and suppress blues (sky).

     3. Add a gentle S-curve in Tone Curve—lift highlights (flesh) and deepen shadows (background).

     4. Use a radial filter to selectively brighten eyes or face if needed.

Note: Since IR de-emphasizes pigment, blemishes often vanish—but you may still need to address minor hotspots on the forehead or nose (common IR artifacts).

3. Addressing Hotspots and Artifacts

• Spot Healing for Center Hotspots:

  • If you converted your camera to 630 nm (lower IR cutoff), you might see a faint bright circle centered in each frame. In Photoshop:

    1. Duplicate the background layer.

    2. Use the Elliptical Marquee Tool to draw a circle roughly matching the hotspot.

    3. Feather the selection (50–100 px depending on resolution) to blend the edges.

    4. Use Image → Adjustments → Exposure to reduce exposure within that circle by −0.3 to −0.7 EV until it matches the surrounding tonality.

• Noise Reduction:

  • IR portraits shot at longer exposures can exhibit “amp glow” or patchy noise in shadows (especially near the sensor’s edges). In Lightroom, under the Detail panel:

    • Increase Luminance Noise Reduction (around 20–40) and Detail (around 50–60) to smooth shadows without losing fine facial textures.

    • If color noise appears (rare in IR), bump up Color Noise Reduction to around 25–30.

4. Retouching Considerations for Skin

• Preserving IR Texture:

  • IR often “softens” skin naturally—but if you go overboard with smoothing or cloning, skin can look unnaturally plastic. Use gentle dodging and burning instead of full-face frequency separation.

• Eyes & Catchlights:

  • A bright IR catchlight can make the eyes glow. If this fits your artistic vision, highlight it. If it’s too intense, reduce local highlights with a small brush in Lightroom (Brush tool, Highlights −25).

• Vein/Undertone Corrections:

  • If under-eye veins or dark circles appear too pronounced, use a low-opacity spot-healing brush (20–30 %) to subtly attenuate. Avoid over-whitening: the IR aesthetic embraces a slight glow beneath the eyes.

Part 5 – Creative Applications and Showcase

Now that you’ve mastered gear selection, shooting techniques, and post-processing, it’s time to explore artistic directions and ways to share your IR portraiture:

1. Fine-Art Portrait Series

2. Ghostly / Paranormal-Inspired Looks

3. Local Showcases & Exhibitions

4. NFT & Online Monetization Opportunities

1. Fine-Art Portrait Series

• Ethereal Black & White Collections: Curate a set of 10–15 IR portraits (family, children, elders) in black & white. Print large-format on matte papers to accentuate contrast—skin glows off the page, while backgrounds vanish into dramatic shadows.

• Limited Edition Prints: Numbered editions (e.g., 1/20, 2/20) can elevate perceived value. Consider signing each print as “Benjamin VanLocke (IR series 2025)” to tie in your existing art pseudonym.

Tip: When framing, use wide white mats (3–4 inches) to give your IR portraits breathing room—the stark contrast between the bright IR subject and the dark frame creates a striking gallery presence.

2. Ghostly / Paranormal-Inspired Looks

• “Phantom” Portraits: Ask your subject to wear semi-opaque fabrics (white gauze, lace) over parts of the face. Under IR, these materials often become translucent—revealing just enough facial details to look haunting.

• Dual-Exposure Technique: Combine one IR exposure of the face (with the subject motionless) and one ghost-transparency layer (e.g., subject moving slightly) in Photoshop. Reduce opacity of the second layer (20–40 %) for a spectral double‐exposure effect.

• Infrared & UV Combo: If your Nikon is full-spectrum converted, switch between a UV pass filter (e.g., 380 nm) and IR pass (720 nm) to capture two exposures—one revealing skin fluorescence (UV) and one showing IR reflectance. Blend in post to produce otherworldly portraits that “straddle” two invisible realms.

3. Local Showcases & Exhibitions

• Holland, Michigan Landscapes + Portrait Fusion: Combine IR portraits of local residents with IR landscapes (dunes, Lake Michigan shorelines) to craft a “Faces of Holland in Infrared” exhibition.

• Cafe or Gallery Pop-Up: Partner with a downtown Holland café (e.g., Laketown Coffee) to mount 8–10 IR portraits as a month-long feature. Offer small 5×7 prints for sale, or host a “Meet the IR Artist” evening where you demonstrate gear and post-processing.

• Workshops & Live Demos: Teach a half-day workshop at a local art center (Art Gallery of Holland) on “Infrared Portraiture 101.” Provide loaner Nikon cameras with 720 nm filters so participants can shoot and review RAW files on the spot.

4. NFT & Online Monetization Opportunities

• IR Portrait NFT Drops: Since you already mint NFT art under Benjamin VanLocke, create a limited IR portrait collection—perhaps “Michigan Ghost Faces” series of 10 digital IR prints. Host a timed auction on OpenSea, promoting via Twitter and Discord communities focused on IR and paranormal art.

• Digital Download Sales: For portrait subjects (with their permission), offer high-resolution IR JPEG or TIFF downloads on your website. Bundle “IR portrait presets” for Lightroom—sell a package that helps other Nikon IR shooters recreate your skin-toning and channel-swap effects.

• Sponsored Content & Gear Affiliates: Partner with Nikon lens rentals (e.g., LensProToGo) or IR conversion services (Kolari, IRreCams). Write affiliate-linked gear reviews: “My Top Three Nikon Lenses for IR Portraits” with rental links so readers can try before they buy.

Conclusion

Infrared portraiture transforms how we see human subjects—subtly rewriting our notions of skin, expression, and mood. By choosing Nikon bodies (whether unconverted with a 720 nm filter or professionally modified), selecting lenses known for minimal hotspots, and mastering manual focusing/exposure, you open doors to a world where faces glow like ghostly luminescence and backgrounds bloom into white halos.

Remember:

• IR for the Human Face ≠ Regular Visible-Light Portraiture. You must contend with focus shift, long exposures, and radically different skin reflectance.

• Gear Choices Matter. Full-frame Nikon bodies with strong IR sensitivity (D850, Z6/Z7, D750) will deliver the best dynamic range for delicate facial detail.

• Post-Processing Is Key. Whether you pursue a whimsical false-color palette or a classic black & white finish, careful RAW conversion, channel-swapping (if desired), and judicious retouching will distinguish your IR portraits from ordinary images.

• Local Context Adds Meaning. Leverage the unique landscapes and people of Holland, Michigan—combine IR portraits with IR landscapes to celebrate your community’s hidden, luminous side.

With these tools and techniques in hand, your “Infrared Portraiture with Nikon” series will not only fill a gap on the www.eovaldiartscience.com/blog (no existing IR portrait posts) but also showcase the intersection of art, science, and community that defines your work. Whether your goal is fine-art prints, ghostly paranormal themes, or NFT drops, IR portraiture offers an unforgettable way to reveal the invisible soul behind every face.