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Tiffen 305SKY 30.5mm Sky 1A Lens Filter — main product image
Tiffen

Tiffen 305SKY 30.5mm Sky 1A Lens Filter

★★★★★4.7 (288 reviews)

Compact 30.5mm skylight filter that protects your lens from scratches and dust while adding subtle warmth to outdoor shots.

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Overview

The Tiffen 30.5mm Sky 1A filter serves a dual purpose: it acts as a physical barrier protecting your lens from everyday hazards like dust, moisture, fingerprints, and scratches, while also providing a slight optical correction. The Sky 1A designation means the filter carries a subtle pink tint that absorbs ultraviolet light and reduces the cool blue cast that often appears when shooting in open shade or under overcast skies. Built with Tiffen's ColorCore technology — where the filter material is laminated between two layers of optical glass — the 305SKY delivers consistent color rendition across the entire surface.

At 30.5mm, this filter fits a relatively niche thread size typically found on compact camcorders and select smaller lenses. For owners of these devices, the Sky 1A provides an easy and affordable way to keep the front element protected at all times without introducing noticeable color shifts or light loss. It threads on and stays on, making it a practical choice for users who want set-it-and-forget-it lens protection with a mild warming benefit for outdoor shooting.

Key Features

Protects your camera or camcorder lens against dust, moisture, fingerprints, scratches and damage.

Can be kept on your camera at all times.

Popular general use filter.

Pink-tinted for added warmth and better colors.

Especially helpful when shooting in outdoor open shade and on overcast days.

Specifications

Filter Size
30.5mm
Filter Type
Sky 1A (Skylight)
Construction
ColorCore Technology
Effect
UV Light Absorption, Slight Warming
Primary Use
Lens Protection, Color Correction
Model
305SKY

Pros & Cons

👍 Pros

  • The 30.5mm size fits compact camcorders and smaller lenses that have fewer filter options available.
  • Tiffen's ColorCore technology ensures consistent color and density across the entire filter surface.
  • Can be left on the lens permanently as everyday protection without impacting image quality.
  • Subtle warming tint reduces blue color casts in shade and overcast lighting without heavy color shifting.

👎 Cons

  • The 30.5mm thread size is uncommon, limiting compatibility to a narrow range of lenses and camcorders.
  • The warming effect is very subtle and may be imperceptible in many shooting conditions.
  • Does not include a protective case or pouch for storage when removed.
  • Offers minimal UV filtering compared to dedicated UV or haze filters.

Frequently Asked Questions

This filter fits lenses and camcorders with a 30.5mm filter thread. Check your lens cap or front ring for the thread size before purchasing.
Yes. The Sky 1A is designed to stay on your lens at all times, serving as a permanent protective barrier against dust, moisture, fingerprints, and scratches without negatively affecting image quality.
The Sky 1A has a subtle pink tint that absorbs UV light and counteracts the cool blue cast common in open shade and overcast conditions, producing slightly warmer and more natural-looking colors.
No. The Sky 1A is nearly clear with only a very slight tint, so it does not reduce light transmission enough to affect exposure settings or interfere with autofocus systems.

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