49mm Special Effect Lens Filter OEM / ODM Swirl Bokeh Filter With Optical Glass
Currently, it is confirmed that lenses with a double-Gauss structure deliver the best results. This structure typically features focal lengths between 35-58mm, apertures ranging from f/1.4 to f/2.8, and lens configurations most commonly consisting of 5 groups with 6 elements, though 4 groups with 6 elements, 6 groups with 6 elements, or 6 groups with 7 elements are also found. Other standard lenses may be worth trying, but non-prime lenses, lenses with apertures too small for effective bokeh (below f/2.8), and prime lenses with excessively short focal lengths (e.g., 24mm) will yield poor or negligible results.
Advantages:
- Achieves a swirling bokeh effect while fully preserving the lens's native autofocus and background blur capabilities
- Delivers more natural swirling bokeh and vignetting ambiance
Disadvantage:
Since designs vary by lens model, some lenses exhibit slight vignetting in 3:2 aspect ratios. However, none of the tested lenses show vignetting in 16:9 aspect ratios.

| Product Name | Swirl Bokeh Filter |
|---|---|
| Function | Create Swirl Bokeh effect |
| Material (Glass) | Excellent Optical Filter |
| Material (Frame) | Aluminum Alloy |
| Diameter | 49mm, other sizes can be used by adapter ring |
| Suitable for lenses | Prime lens, Better 50mm F1.8. eg: Nikon AF 50mm F1.8 Canon EF 50mm F1.8 Sony FE 50mm F1.8 |
| Frame Color | Black |
| Process (Frame) | CNC, Anodizing, Laser Engraving |
| OEM / ODM | YES |
|---|---|
| Trading Type | B2B |
| Package | Plastic Box / Fabric bag, EVA case / Hard paper box / Customize |
| MOQ | Filter 100 PCS, Package depends on the details |
| Lead time | Ready goods in 3 working days, or else 20-30 days |
| Shipping | By Express / By Post / By Air / By sea |
| Trade Terms | EXW / FOB / FCA / CIF / Door to Door |
| Payment | TT / Western Union / PayPal / Transferwise / Alipay |
| Spare Parts | Available |
Any questions, welcome to talk with our sales, you will be replied in 24 hours at the latest!
We support:
- R&D / OEM
- Production process follow up
- Customizing package
- Inspection before delivery
- Shipping with difference terms, EXW, FOB, FCA, CNF, CIF, DOOR TO DOOR by sea, by air, by express, by post
U-safe Technology Co., Limited is legally registered in Hong Kong, which is a B2B trading company trying to build the bridge of business between Chinese factories and all overseas importers, helps you to get the correct products / solution safely, easier and faster. Office is located in IC Park Shenzhen China for the convenience of closer coordination with factories.
- Rich options among all Chinese factories, helps you to find out the reliable one with qualified products and most affordable price
- Helps you to verify the qualification and credit of the factory, so that to make sure your transactions is safe
- With rich experience and sources to help you to develop new creative products avoiding competition of industry homogenization
- Helps you to build your own brand by OEM/ ODM
- With local culture and language advantage, helps you to solve problems faster and easier
- Helps you to monitor the production process to ensure the quality and delivery in time
- Inspection before delivery to make sure correct quality and quantity delivered
- Provides DDP shipping service to your warehouse by sea / air / express on request
- You can authorize U-SAFE to manage all your Chinese suppliers so that to save you time and energy if necessary
- Have a partner working for you during your nights to shorten your schedule, and finish the project earlier
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