The Schneider 4x4" 4mm Red 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 Red 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 red 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 orange, yellow, green, blue, pink, or violet banding instead of red 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    Red 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 red-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. What is the best enlarger lens to print 35mm negatives on a Beseler 4x5 enlarger?

A: A 50mm Schneider or Rodenstock lens would be most useful.

Q: 2. Is it compatible with BMPCC4K? In case not, is there any adaptor?

A: Yes. The Blackmagic Design Pocket Cinema Camera 4K, B&H # BL4KPKCAM, uses the Micro Four Thirds lens mount, and the Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Micro Four Thirds uses the Micro Four Thirds lens mount, you may use the Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Micro Four Thirds on the Blackmagic Design Pocket Cinema Camera 4K. Do note that the Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Micro Four Thirds is a fully manual lens, so you would have to focus the lens manually and adjust the aperture of the lens using the aperture ring built onto the lens.

Q: 3. 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: 4. Will this lens work on Panasonic G9ii ?

A: Yes, the 7artisans Photoelectric 4mm f/2.8 Circular Fisheye Lens for Micro Four Thirds is compatible with the Panasonic G9ii. It is manual focus and manual exposure only.

Q: 5. just curious if it is hard to focus with this fisheye?

A: As a fisheye lens, the 7artisans Photoelectric 4mm f/2.8 Circular Fisheye Lens has a deep depth of field and a short focus throw so it is very easy to focus.

Q: 6. do this lens work fine with fx3 and fx6 full frame cameras?

A: The Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Sony E will work on a full frame camera but it will only produce a small circle in the frame. It is made for use with a crop sensor.

Q: 7. 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: 8. Does this lens make a full circular image on a MFT sensor?

A: It is not quite a full circle. Please take a look at the sample images.

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. Will I get vignetting (black corners) with this lens on a nikon z30?

A: Yes, Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Nikon Z creates a circular vignetting effect when mounted on Nikon Z30 or APS-C sensor mirrorless cameras.