Manual Micro-Focusing Ring for Samyang / Rokinon 135 F/2

Name: Manual Micro-Focusing Ring for Samyang / Rokinon 135 F/2
Brand: Azur3dprint
SKU: REF039
Price: 12 EUR
Availability: PreOrder

€12.00

Tax included

Tame the razor-thin critical focus zone of your Samyang/Rokinon 135mm F/2 lens manually with sub-millimeter precision—no motor needed.

🎯 Micrometric Tuning & Positive Lock: Dual-opposed push thumbscrews drive a top guide tab for smooth focus tweaks and rock-solid lockup.
💎 Carbon-Fiber PETG: Rigid, temperature-stable polymer ring delivering zero play and direct mechanical feedback.
🔩 Pro Hardware: 2x M4x20 stainless steel & anodized aluminum knurled thumb knobs for effortless grip with winter gloves.
📦 Complete Package: Includes focus ring, 2 thumb knobs, and 2 Vixen rail spacer blocks with extended screws.

Description
Product Details

Manual Micro-Focusing Ring — Samyang / Rokinon 135mm F/2

Micrometric manual control and positive mechanical lock for Azur3dprint Samyang mounting rings

At f/2 wide-open aperture, the critical focus zone (CFZ) of the Samyang / Rokinon 135mm F2 ED UMC telephoto lens is razor-thin: manually twisting the rubberized barrel ring often causes frustrating overshoots. For grab-and-go astrophotographers or lightweight field setups that avoid bulky electronic focus motors and extra power cables, the Azur3dprint manual micro-focusing ring delivers smooth mechanical reduction and positive focus locking.

🔬 Dual Opposed Push-Screw Mechanics

⚙️ Ultra-Fine Push Tuning

The ring features a top drive tab that rides along the upper channel of your Azur3dprint Samyang cradle. Rotating one of the lateral M4 knurled thumb knobs pushes the tab with micrometric precision, allowing you to dial in pinpoint star profiles or minimum FWHM values.

🔒 Positive Mechanical Lock

Once critical focus is acquired, simply tighten down the opposing thumb knob on the other side. The tab is firmly clamped between both screws, locking down focus and eliminating any unwanted drift during meridian flips or telescope slews.

Carbon-Fiber PETG Build & Hardware Clearance

Engineered to work seamlessly with the Azur3dprint Samyang 135mm tube ring cradle:

Carbon-Fiber PETG Construction: Printed in carbon-fiber reinforced PETG polymer for maximum torsional stiffness and thermal stability in cold, humid night conditions.
Heavy-Duty M4x20 Knurled Knobs: Ships with 2 large-diameter thumb screws crafted from stainless steel and anodized aluminum, offering superb grip and tactile control even when wearing heavy winter gloves.
Vixen Rail Spacer Blocks Included: The kit packs 2 dedicated riser blocks with longer bolts to install beneath your top mini Vixen bar. This lift provides the necessary mechanical clearance for the lateral push screws to operate freely without obstruction.

"Manual focusing on the Samyang 135mm at f/2 is often an exercise in frustration: releasing your hand from the rubber ring easily snaps focus out of alignment. This dual opposed push-screw system removes that elastic bounce. You dial in focus smoothly, clamp the opposing screw, and run your subs through the night without worrying about focus slip."

— Vincent, Founder of Azur3dprint

Package Contents & Specifications

Lens Compatibility: Samyang 135mm F/2.0 ED UMC and Rokinon 135mm F/2.0.
Mount Interface: Designed exclusively for Azur3dprint Samyang 135mm tube ring assemblies.
Core Material: High-density Carbon-Fiber reinforced PETG.
Adjustment Mechanism: Central guide tab + dual opposed push/lock thumb screws.
Hardware Included: 2x M4x20 mm stainless steel & anodized aluminum knurled knobs.
Vixen Elevation: 2x Riser spacer blocks + extended mounting hardware for top mini Vixen plate.