The Schneider 4x4" 4mm Violet True-Streak Filteris designed to be used perpendicular to a point light source such as the sun, a light bulb, or a candle. Within the filter's glass is a combination of fine line types whose action is limited to point light sources. Upon those light sources, those lines create the effect of a scene or image that has been recorded with an anamorphic lens and then displayed using a complementary reverse projection lens. This can result in prominent, elongated streaks that are symmetric and extend horizontally from each point light source for the purpose of drawing attention to a specific part of the frame, or to create a visually dramatic effect.

If an image or footage is captured with an anamorphic lens for the primary purpose of obtaining a greater aspect ratio than what is possible when only using spherical lenses on a 35mm format, the direct result will appear compressed and distorted. Projecting this compressed and distorted footage or imagery through a reverse anamorphic projection lens allows elements within the scene to be viewed in their correct proportions. A complementary effect of this process after it is completed is the creation of elongated, blue-colored, horizontally symmetrical highlights from point light sources that can extend through the frame.

Many cinematographers and photographers find this effect desirable and the Schneider 4 x 4" 4mm Violet True-Streak Filter is intended to allow such highlights to be easily reproduced when using optics that do not have an anamorphic design. This filter renders the streaks it helps to create with a violet hue, instead of the blue highlights generated when using traditional anamorphic optics that are not designed to suppress streaking. True-Streak Filters that are formulated to create red, orange, yellow, green, blue, or pink banding instead of violet are also available, as well as Clear True-Streak Filters that can allow existing colors or lack of colors displayed by point light sources to be maintained.

The line types within this filter's glass are placed 4mm apart from each other. True-Streak Filters with spaces of 3mm, 2mm, or 1mm between their lines are also available where this filter type's effect becomes progressively stronger as the spacing between those lines is decreased.

This filter is most effective for pictures where the light source used to generate the streak effect is a highlight with a significant degree of contrast from the rest of the image. It is constructed from water white glass for clarity as well as color fidelity.

Streak Effect from Point Light Source    Anamorphic, Symmetric, Elongated Streaks    Horizontal Streaks from Light Source    Violet Color for Streaks    Water White Glass Construction    Padded Pouch

• Creates prominent, elongated streaks that are symmetric and extend horizontally from point light sources within a scene
• Draws attention to a specific part of the frame, or can create a visually dramatic effect
• Allows the effect of anamorphic optics upon highlights to be reproduced when using optics that do not have an anamorphic design
• Creates violet-colored streaks
• Constructed from water white glass for optical clarity and color fidelity
• Padded pouch included for storage and transport

Related Questions and Answers

Q: 1. I will use that lens on a Fujifilm x-T2. I understood that the resultant image will be fully or partially circular, with a black part alla around. I will use it for panoramic and get rid of the black part. What will be the megapixel size of the usable part (24mp minus the black) ? Thanks

A: When using the Venus Optics Laowa 4mm f/2.8 Fisheye Lens for FUJIFILM X, your useable megapixel size will be about 30% less (approx 16 MP).

Q: 2. does the 81.5 mm fit an 82mm step up? why 81.5mm?

A: I'd measure the outside diameter of the the step up with something accurate like vernier calipers or a micrometer. I purchased the 90mm push on Cap to fit a Schneider centre ND filter which I measured to be exactly 90mm outside diameter and the cap was a fairly tight fit.

Q: 3. is it work with cricket ?

A: The Sony XPERIA 1 IV 512GB 5G Smartphone would work with Cricket Wireless.

Q: 4. If used, does it come with the manufacturer waranty?

A: Used products come with a 90 day warranty with B&H.

Q: 5. What does the term Photoelectric mean?

A: The term Photoelectric on the 7artisans Photoelectric 4mm f/2.8 Circular Fisheye Lens for Micro Four Thirds just means it is a lens that was designed for digital. This is a purely mechanical lens, with mechanical aperture and focus control. This does not communicate with the camera.

Q: 6. Can I zoom in to get rid of vignetting (black corners) with this lens on a nikon z30?

A: The Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Nikon Z is a lens with a fixed focal length of 4mm, so you cannot zoom in with this lens.

Q: 7. DOES IT WORK WITH THE TELCEL 5G NETWORK IN MEXICO?

A: The Sony XPERIA 1 IV 512GB 5G Smartphone (Violet), B&H # SOX1IVV, is unlocked and should work with most carriers but we could not guarantee it. You should confirm directly with your carrier, ultimately, they operate the network and are the only ones who can tell you with absolutely confidence whether the device supports 5G in your specific region or not.

Q: 8. Is it Single or Dual-SIM? Does it have an e-SIM? Thx

A: This phone will support the following, Single SIM (Nano-SIM or eSIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by.

Q: 9. Would it be possible to adapt this to C mount? The focal length is wide enough that it sounds great for C mount super 8mm cameras. Do you have adapters from any of these mount options to C? And would the flange be off?

A: Unfortunately, we do not have any lens mount adapters designed to connect a lens designed for the Canon EF-M lens mount onto a camera that uses the C-mount lens mount.

Q: 10. Is there a version for RF?

A: No, the 7artisans Photoelectric 4mm f/2.8 Circular Fisheye Lens does not come in a RF version. Currently we have a 7artisans Photoelectric 4mm f/2.8 Circular Fisheye Lens for Canon EF-M.