Costa Fantail vs Blackfin vs Rinconcito: Which Fishing Sunglasses Fit Best?

Fit and side coverage matter more than lens color when choosing fishing sunglasses. The Costa Fantail, Blackfin, and Rinconcito are three popular Costa Del Mar frames that share good polarization options but sit differently on the face. After wearing each type on and near the water, the differences are practical rather than theoretical.

At a glance

Model	Size	Approx. width	Lens curve	Best for
Fantail	Medium	~131 mm	Base 8 high wrap	Small–medium faces, active fishing
Blackfin	Large	~135 mm	Base 8 high wrap	Medium–large faces, max coverage
Rinconcito	Medium	~130 mm	Base 6 medium wrap	Average faces, mixed use

Fantail and Rinconcito are close in total width but feel different: Fantail wraps harder; Rinconcito sits flatter with longer temples. Blackfin is the roomiest.

Fantail – compact high wrap

Approximate specs: 131 mm width, 59.2 mm lenses, 14 mm bridge, 127 mm temples. Base 8 curve brings the lenses around the sides and limits peripheral glare.

Best starting point for small to medium faces or anyone who wants a close, secure fit while casting or moving on a boat. On a broad face it can feel tight at the temples after several hours. Strong choice for kayaking, flats, and shore work where stability matters.

Blackfin – larger fishing frame

Approximate specs: 135 mm width, 61.8 mm lenses, 17 mm bridge, 120 mm temples. Same Base 8 wrap philosophy in a wider package.

Safest option for medium to large faces and for full days of reflected water and sun. Feels like dedicated equipment. On a narrow face it can sit too wide or leave gaps that defeat the wrap. Standard Blackfin remains a solid choice; Pro versions add further angler features at higher cost.

Rinconcito – relaxed medium fit

Approximate specs: 130 mm width, 60 mm lenses, 12 mm bridge, 140 mm temples. Base 6 curve, integral spring hinges, Hydrolite at nose and temples.

Better for average faces and for people who dislike the compressed feel of heavy wrap. Works for fishing plus driving and everyday wear. Side coverage is less complete than Fantail or Blackfin; for long offshore days a Base 8 frame usually blocks more stray light.

Coverage ranking

Blackfin highest overall. Fantail nearly as protective in a smaller size—often the better real-world choice on smaller faces because it seals better. Rinconcito prioritizes comfort and versatility over maximum enclosure.

580G vs 580P lenses

580G (glass) – maximum clarity and scratch resistance; preferred for spotting and long glare sessions; heavier and less impact-resistant.

580P (polycarbonate) – lighter, more impact-resistant; better for kayaking, active movement, or all-day weight sensitivity.

Lens color: blue mirror for harsh open water; green mirror often favored inshore; gray/silver for more neutral everyday viewing. Browse the wider Costa range if you need additional shapes.

Which to buy

Fantail – small/medium face, tight wrap, active fishing.
Blackfin – medium/large face, maximum coverage, long sun days.
Rinconcito – medium face, mixed fishing and daily use, less aggressive wrap.

FAQ

Is Fantail smaller than Blackfin? Yes—roughly 131 mm vs 135 mm.

Most coverage? Blackfin, then Fantail; both Base 8.

Rinconcito for fishing? Yes for mixed use; less sealed than the other two.

Narrow face? Start with Fantail.

580G or 580P? Clarity/scratch → 580G; weight/impact → 580P.

Final note

Match width and wrap to your face first, then choose lens material and color. A correctly fitted Fantail, Blackfin, or Rinconcito will stay put, block more stray light, and let you focus on the water instead of adjusting the frames.