The Schneider 4x4" 4mm Yellow 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 Yellow 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 yellow 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, green, blue, pink, or violet banding instead of yellow 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    Yellow 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 yellow-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. Does this lens mount on a RF mount as well?

A: No, this is for an EF-M mount only.

Q: 2. 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: 3. Does this lens make a full circular image on a Fujifilm X sensor?

A: This won't work on Fuji. You will need this lens that has a Fuji X mount. It does create a circular image on Fuji X sensor. https://www.bhphotovideo.com/c/product/1542241-REG/venus_optics_ve428fx_laowa_4mm_f_2_8_fisheye.html

Q: 4. will this lens fit my Panasonic Lumix G85 ?

A: Yes, the Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Micro Four Thirds lens will fit Panasonic Lumix G85.

Q: 5. It mentions that the lens is compatible with Nikon Z30 Nikon Z50 and Nikon Zfc. How about the Z6?

A: Yes, the Venus optics laowa 4mm lens will adapt to all Nikon Z bodies.

Q: 6. Is this lens compatible with Canon EOS 70D? If not, is there an equivalent lens for my camera (DSLR)?

A: The Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Canon EF-M is designed for Canon mirrorless cameras that use the EF-M lens mount, while the Canon EOS 70D DSLR camera uses the larger Canon EF-mount and EF-S lens mount. The above lens would not be compatible for use on the Canon EOS 70D DSLR camera. If you are looking for a circular fisheye lens designed for the EF/EF-S lens mount used on the Canon EOS 70D DSLR camera, I would instead recommend the Lensbaby 5.8mm f/3.5 Circular Fisheye Lens for Canon EF, B&H # LE5835CFC, for your usage needs.

Q: 7. Will this work on a Canon R5? How much of the sensor would the circular image use actually fill?

A: The Canon R5 will be automatically set to Crop mode if you mount the Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Canon RF on it, so you would use only an APS-C size part of the full-frame sensor. The lens will make a circular image surrounded by black in this small section of the sensor.

Q: 8. Which mattebox works with theses lenses? So the mattebox is not visible in the picture?

A: It is not recommended to use a matte box with the Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Canon RF because with the amount of fisheye that this lens has, the matte box will be in the frame. The same thing will happen with a lens hood as well.

Q: 9. What’s a ND solution for this?

A: The neutral density solution for the Venus Optics Laowa 4mm f/2.8 Fisheye Lens for Canon RF is using a mattebox with the respective filter.

Q: 10. 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.