K&F Split Diopter Center Field Middle +1.0 (82 mm) — 82mm Split Diopter Filter

The K&F Split Diopter Center Field Middle +1.0 (82 mm) is a precision optical accessory designed for photographers and filmmakers who need to capture simultaneous sharpness in near and distant parts of the same frame. This 82 mm split diopter filter inserts into standard 82 mm filter threads and creates a middle split diopter effect with +1.0 optical power. It enables creative control over depth of field by allowing separate focal planes to coexist, useful for narrative compositions, product shoots, and experimental visual effects.

Advantages

The split diopter provides a reliable +1.0 optical power in the center field, delivering a clear transition between the focused near and far areas while preserving image quality across the frame. Constructed to fit 82 mm filter threads, it is compatible with lenses that accept screw-in filters, ensuring secure mounting and straightforward integration into existing lens setups. The optical surface is manufactured to maintain contrast and minimize chromatic aberration, supporting professional results when combining focal planes in a single exposure.

Suitable for

• Narrative filmmaking where simultaneous foreground and background focus is required
• Creative portrait or fashion photography using split focus techniques
• Product and macro scenes that pair detailed foreground subjects with contextual background
• Experimental and artistic stills or motion work exploring depth and composition

Key specifications

• Filter size: 82 mm screw-in mount compatible with 82 mm lenses
• Optical power: +1.0 diopter in the center field
• Effect type: split diopter (center field middle configuration)
• Application: creates two simultaneous focal planes within a single frame
• Construction: optical-grade glass element designed for minimal distortion

How to use

Mount the split diopter onto the front filter thread of an 82 mm lens, ensuring it is seated securely. Compose the shot and first focus on the background plane, then refocus the near subject through the diopter area to obtain a sharp foreground while retaining background focus. Small adjustments to aperture and camera-to-subject distance will influence the perceived separation between planes; use live view or focus peaking where available to fine-tune sharpness. When shooting video, lock exposure and white balance to maintain consistency across both planes.

Usage recommendations

For best results, use moderate apertures to balance depth of field across planes and check for vignetting on wide lenses. Consider positioning the split line to align with natural scene elements so the transition appears intentional. Handle the filter by its edges and store it in a protective case when not in use to prevent scratches and dust on the optical surface.