If the subject wears glasses and you want clean, visible eyes, 85mm is usually the safer choice because you can stand farther back and narrow what the lenses “see” and reflect toward the camera. 35mm becomes the better choice when you need context (environmental portrait) and you can control angles and light so reflections miss the lens.

What actually creates glasses glare (and why focal length changes the odds)

Glasses glare is just a mirror problem: light hits the curved lens surface and bounces off at a predictable angle. If that bounce lines up with your camera, you get bright patches that hide the eyes. The lens you choose doesn’t change physics, but it does change how you’re forced to work: your distance, framing, and where lights and bright windows end up relative to the camera.

A simple way to think about it: 35mm makes you work closer and include more of the room; 85mm lets you work farther and include less of the room. More of the room in frame usually means more potential bright sources that can reflect into the glasses.

The hidden tradeoff: distance, not “compression,” is what changes faces

People often say 85mm “compresses” faces and 35mm “distorts” them. What’s really happening is camera-to-subject distance. With 35mm, you typically step closer to fill the frame with a head-and-shoulders portrait. Closer distance exaggerates relative size: the nose is nearer than the ears, so it looks larger. With 85mm, you step back, and those distance differences shrink, so proportions look more natural.

This matters for glasses because closer distance also makes your camera sit closer to the same axis as your lights and the reflective surfaces. If you’re close, small shifts in head angle can swing a reflection right into the lens. Farther back, it’s often easier to place the camera and lights so the reflection “misses” the lens.

When 85mm is better for portraits with glasses

Choose 85mm when your goal is a clean portrait where the eyes must read clearly:

1. You want fewer reflection sources in play. The narrower field of view crops out side windows, overhead fixtures, bright walls, and shiny objects. Fewer bright objects near the camera’s direction = fewer chances they appear as glare on the glasses.
2. You can solve glare by backing up and re-framing. Backing up and using a longer focal length often reduces reflection issues because the camera sees a tighter slice of angles and background sources. This “reframe from farther away” approach is a practical fix that consistently works when 35mm suddenly creates glare you didn’t have before. (Fstoppers)
3. Your lighting can sit higher and farther off-axis. With 85mm you can keep the camera position comfortable while moving lights to a place where their reflection bounces above or to the side of the camera. Small changes—raising the key light, angling it down, or shifting it laterally—often clear the lenses without changing the look of the portrait too much.
4. You’re shooting headshots or tight half-body portraits. The tighter the framing, the more 85mm tends to simplify the scene and reduce distractions—both in the background and in the glasses.

Practical 85mm setup that usually works

• Put the key light higher than eye level, angled down.
• Have the subject tilt the glasses slightly down (tiny change—think “chin down 1 cm,” not a dramatic move). The goal is to aim the reflective plane so it bounces light away from the camera.
• If glare persists, move the light a little farther to the side (still flattering) and keep the camera near the subject’s eye line.

When 35mm is better (and how to avoid turning glasses into mirrors)

Choose 35mm when you need the environment to be part of the story—office, workshop, street, kitchen—and you can manage reflections intentionally.

1. Environmental portraits demand context. With 35mm, the background says “who this person is” because you see more of their world. If that’s the job, 85mm may hide too much.
2. You have space constraints. In small rooms, 85mm may force you into a wall. 35mm may be the only way to frame the subject the way you need.
3. You can control what’s reflected. With a wide view, bright windows and lights are more likely to be “in the neighborhood” of the angles that reflect into the camera. So you win with 35mm by controlling angles:
   • Move yourself and the subject until reflections slide out of the lenses.
   • Change the subject’s head angle slightly (often just a few degrees).
   • Relocate the key light higher or more to the side.
     These adjustments follow the basic rule: angle of incidence equals angle of reflection—move the geometry, and the glare moves with it. (That Tog Spot)
4. You’re okay with a different “feel.” A 35mm portrait feels more immediate and close. That can be a feature, not a bug—especially for editorial-style imagery.

Practical 35mm checklist (so you keep the context, not the glare)

• Start with the subject’s glasses as the “aiming surface.” Ask them to look at your lens; then adjust light position until the reflection disappears.
• Raise the key light and angle it down. This frequently pushes the reflection downward/out of the lens area, while still giving good facial modeling.
• Watch the environment. With 35mm, a bright window off to the side can be the “light source” causing the reflection even if you’re not using flash. Rotate the subject a few degrees so the window reflection bounces away from camera.

A simple decision rule that works in real shoots

If you remember only one rule:

• If the glasses are causing problems and you don’t need the room in the story: go longer (85mm).
• If the room is part of the story and you can manage angles: go wider (35mm).

Then refine it with two quick questions:

1. How controlled is your light?

• Controlled (studio/strobe/you can move lights) → either lens works, but 85mm is faster to clean up.
• Uncontrolled (windows, overhead office lights, mixed sources) → 85mm often reduces the number of bright things that can reflect.

2. How much space do you have?

• Tight space → 35mm may be required; plan to spend more effort on angles.
• Plenty of space → 85mm gives you cleaner geometry and calmer reflections.

Don’t ignore comfort and cooperation (because glasses are worn by people)

Technical fixes work better when the subject is comfortable. With 35mm, you’re physically closer, which can make people tense—especially if you’re also asking them to micro-adjust head angle and glasses position. With 85mm, you can stand back, give calm direction, and the subject often relaxes, which improves expression and reduces “stiff” posing.

A useful phrasing that avoids confusion:

• “Turn your face a tiny bit toward the light.”
• “Now tilt your chin down just a touch.”
• “Hold that—perfect. The glare is gone.”

Small, clear steps beat explaining reflection physics on set.

Why does this matter

Because if the eyes disappear behind glare, the portrait stops feeling like a person and starts feeling like a lighting mistake—and the lens choice is one of the fastest ways to prevent that.

Sources

• Nikon Learn & Explore — “Understanding Focal Length” (nikonusa.com)
• Fstoppers — “How to Photograph People With Glasses While Avoiding Reflections” (Fstoppers)
• That Tog Spot — “How to avoid reflections in studio photography” (That Tog Spot)