Cokin

Cokin P161 P-Series Pola-Color Red Filter

Name: Cokin P161 P-Series Pola-Color Red Filter
Brand: Cokin
SKU: P161

Rotate in a bold red polarized cast or back it off to near-neutral — in-camera creative color with a single filter.

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Overview

The Cokin P161 Pola-Color Red sits at the intersection of polarization and creative color — a filter that does both simultaneously rather than forcing you to choose. For black-and-white landscape photographers, it's a classic technique made portable: strong red filtration darkens blue skies, deepens contrast between clouds and atmosphere, and cuts through haze in a way that straight monochrome conversion struggles to match. For color work, it imposes a warm-to-red polarized cast that has a distinctly analog quality — the kind of in-camera effect that gives images an immediate visual character without the smoothed-out look of post-production color grades.

The filter slides into a standard Cokin P-Series holder and rotates freely within it, letting you progressively shift from near-neutral to a pronounced red cast as you turn the filter in the holder. Build quality is consistent with the Cokin P-Series system — durable resin construction that handles field conditions without issue. The 1-1/3 stop exposure reduction is real and needs to be factored into your exposure, particularly in manual mode or when shooting in quickly changing light. The P161 is a deliberate creative choice rather than a utility filter, but for photographers who want to control color in-camera and work within the Cokin P-Series system, it delivers a distinctive result that's genuinely worth carrying.

Key Features

Fits Cokin P-Series filter holder

Filter color shifts a scene from nearly neutral to red cast as it is rotated.

Adds creative color effects to the image in camera

1-1/3 Stops exposure reduction

Specifications

Filter Series

Cokin P-Series

Model

P161

Filter Type

Pola-Color Red

Effect

Polarized color cast (red), adjustable by rotation

Exposure Reduction

1-1/3 Stops

Holder Compatibility

Cokin P-Series filter holder

Pros & Cons

👍 Pros

Rotating the filter lets you dial the red cast progressively from near-neutral to a strong color effect, giving you real-time in-camera control rather than a fixed result.
Works within the Cokin P-Series system, meaning it's compatible with adapter rings for a wide range of lens filter thread sizes — one filter serves multiple lenses.
For black-and-white work, the red filtration delivers dramatically darkened blue skies and heightened cloud contrast that's difficult to replicate convincingly in post-processing.
Lightweight resin construction adds negligible weight and bulk to the P-Series holder — easy to carry and swap in the field.
Produces a polarized color effect that has a distinctly analog, in-camera quality that post-production color grading doesn't easily replicate.

👎 Cons

Requires a Cokin P-Series filter holder and the appropriate adapter ring — it cannot be threaded directly onto a lens, which adds setup complexity and additional accessories.
The 1-1/3 stop exposure reduction must be accounted for in manual shooting situations, which can slow down the workflow in fast-changing light.
The red cast applies to the entire frame uniformly — there's no graduated version for applying the color effect to only part of the image.
This is a specialty creative filter, not a general-purpose tool — it won't earn a place in the bag for every shoot.

Frequently Asked Questions

How do I mount the P161 to my lens?

The P161 is not a threaded filter — it slides into a Cokin P-Series filter holder, which attaches to your lens via a P-Series adapter ring. You'll need the appropriate adapter ring for your lens's filter thread diameter, which is sold separately if you don't already have a P-Series holder setup.

What does the 1-1/3 stop exposure reduction mean for my shooting workflow?

When you mount the P161, your camera is receiving 1-1/3 stops less light than without the filter. If you're shooting in auto exposure mode, your camera will compensate automatically. In manual mode, you'll need to open your aperture, slow your shutter, or raise ISO to maintain correct exposure — factor this in when shooting in fast-changing light conditions.

Does rotating the P161 change the color intensity, the polarization, or both simultaneously?

Rotating the filter shifts both the color cast and the polarization together — they're linked in the Pola-Color design. As you rotate, the red cast builds in intensity while the polarization angle changes. You'll find a sweet spot through the rotation that balances the color effect and the reduction of glare or reflections to your taste.

Can I stack the P161 with other Cokin P-Series filters in the same holder?

Yes — the P-Series holder accepts multiple filters in separate slots, so you can combine the P161 with a graduated ND or other P-Series filters. Keep in mind that stacking adds exposure reduction and can introduce vignetting at wide angles, depending on your adapter ring size and lens focal length.

Is the red effect on the P161 useful for black-and-white photography?

Strongly so. Red filtration in black-and-white photography dramatically darkens blue skies and increases the contrast between clouds and sky — a classic darkroom technique now available in-camera. Shooting with the P161 on a clear day will give you dramatically deep skies in your black-and-white conversions, with far more drama than you'd achieve in post alone.