The Schneider 4x4" 3mm 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" 3mm 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 3mm apart from each other. True-Streak Filters with spaces of 4mm, 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. 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. These lenses look like a 1:1 rip off of the dulens apo primes

A: While similar on the outside to the Dulens APO Mini Primes, the Schneider ISCO4all T2.4 3-Lens Kit with 1.5x Anamorphic Adapter (EF Mount) Kit is crafted by Schneider in Germany.

Q: 3. 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: 4. Does the monitor app support true 4k monitoring via uvc connection?

A: Yes. The the monitor app support true 4k monitoring via uvc connection on this Sony XPERIA 1 IV 512GB 5G Smartphone

Q: 5. When would you be able to share all the specs?

A: The current specifications for the Schneider ISCO4all Lens Set can be seen in the link below: https://bit.ly/3Aaokbc

Q: 6. Height Adjustment is possible and if yes how much in cm?

A: Yes, you can adjust the height of the LanParte MB-01 matte box, the adjustment is about 3cm.

Q: 7. Can I still use my Eufy cameras that record 24x7 to Synology Surveillance Station?

A: Ubiquiti Networks Dream Machine 4x4 MU-MIMO AC1733 Wave-2 Dual-Band Gigabit Access Point (BH # UBUDMUS) will not support eufy cameras connected to a Synology Surveillance Station.

Q: 8. 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: 9. is it work with cricket ?

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

Q: 10. I saw in the mobilespecs 1x3.00 GHz Cortex-X2 , 3x2.50 GHz Cortex-A710 , 4x1.80 GHz Cortex-A510 is it correct ?

A: The specifications are correct as listed for the Sony XPERIA 1 IV 512GB 5G Smartphone (Black) BH #SOX1IV. Performance: Operating System Android 12 Memory 12 GB Processor Qualcomm Snapdragon8450 CPU Up to 3 GHz Cortex X2 Single-Core Up to 2.4 GHz Cortex A710 Triple-Core Up to 1.7 GHz Cortex A510 Quad-Core GPU Adreno 730 Storage Capacity 512 GB