Hard Stop — Sigma 18-35mm f/1.8
Follow focus ring with hard stops for the Sigma 18-35mm f/1.8 Art. Precise end stops for accurate focus pulling.
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Responsible economic operator: CURLYHEAD Media GmbH, Doblhoffgasse 7/6A, 1010 Vienna, Austria. Intended as a 0.8 mod follow-focus accessory for camera lenses. Check secure fit before use; contains small parts and is not a toy.
Why this ring
Large form-fit, slip-free and gentle — no grub screws against the barrel or mount.
Clean mesh with the focus motor (0.8 MOD) — no slipping on fast pulls.
Temperature-stable & UV-resistant — reproducible clamping force and long life.
Made exactly for your lens model — unbox, slide on, start pulling.
Design philosophy
I tried different focus rings for years — and they all had catches. So I developed a ring that eliminates these problems.
Material & origin
Made from ASA by Extrudr, sourced in Austria (Vorarlberg). ASA is dimensionally stable, UV-resistant and ideal for precise, long-lasting focus gears.
Outdoor-ready
clean tooth flanks
short supply chains
Mount in 60 seconds
Set the lens focus to infinity before you start.
Slide the ring loosely over the lens' focus ribbing.
Seat it evenly and tighten the screws with the included hex key evenly — not too tight.
Engage the motor, check backlash, turn — done.
Note: don't over-tighten — the clamp is designed to hold with moderate torque.
Packaging & sustainability
Envelope and padding are made from recycled cardboard, with no extra plastic. Short distances from Vienna into the EU.
CO₂
We offset the filament and shipping footprint at double the value.
FAQ
No. The clamp grips over a large form-fit area — there are no grub screws pressing directly onto the lens. So it leaves no marks, not even on delicate vintage lenses.