The Schneider 4x4" 3mm Blue 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 Blue 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 blue hue, which further emulates the character of highlights generated when using traditional anamorphic optics that are not designed to suppress colored streaking. True-Streak Filters that are formulated to create red, orange, yellow, green, pink, or violet banding instead of blue 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    Blue 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 blue-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. can this support the Unifi G4 so long as I have the cloud key?

A: Yes it will. Ubiquiti Networks UniFi Cloud Key Gen2 Plus B&H # UBUCKG2PLUS https://bhpho.to/35K5QhA 1TB 2.5" SATA HDD (Upgradeable) 802.3af PoE | QuickCharge 2.0 USB Type-C 1 x 10/100/1000 Mb/s Ethernet Port 2 x USB Type-C Ports 1 x MicroSD Card Slot Front Panel Display Built-In Battery Hybrid Cloud Technology

Q: 3. 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: 4. 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: 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. where are these lenses manufactured?

A: Following unit is made in Germany.

Q: 7. Can you "empty it" for ease of transportation on plane ?

A: The FOCUS RAT V3 Steady Saddle Rat Bag (Large, True Black) has a hidden zipper that can be used to empty the bag of filling.

Q: 8. Is this lens has got the AF mode? Thanks,

A: There is no autofocus (AF) on these lenses. They are entirely mechanical and have no electronic elements.

Q: 9. Are the 4 LAN ports POE?

A: No, the Ubiquiti Networks Dream Machine 4x4 MU-MIMO AC1733 Wave-2 Dual-Band Gigabit Access Point BH #UBUDMUS does not have PoE.

Q: 10. If I buy this along with the Lamparte DSLR Starter Rig B&H # LABSK01, do I need to also buy 2 short rods for the front to mount the matte box?

A: You should be able to get away without it., Unless you are using a really long lens. You will have to adjust the camera to connect to the the matte box. I don't have the extension and it works fine for me with a GH4.