The Schneider 4x5.65" 1mm Clear 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 5.65" 1mm Clear 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 no color, instead of the blue highlights generated when using traditional anamorphic optics that are not designed to suppress streaking. Clear True-Streak Filters allow existing colors or lack of colors displayed by point light sources to be maintained, while True-Streak Filters that are formulated to create red, orange, yellow, green, blue, pink, or violet banding are also available.

The line types within this filter's glass are placed 1mm apart from each other. True-Streak Filters with spaces of 4mm, 3mm, or 2mm 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    Clear, Colorless 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 clear, colorless 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. will this fit a Hasselblad lens?

A: This all depends on the lens that you purchased. If the front element of the lens is a 77mm, then this filter will work just fine, if not, you will nee to use either step-up or step-down rings accordingly.

Q: 2. Is this compatible with the canon version of Sigma lens?

A: The Haida Clear-Night Filter for Sigma 14-24mm f/2.8 DG DN Art Lens for Sony E is not compatible with the Sigma 14-24mm f/2.8 DG HSM Art Lens for Canon EF.

Q: 3. Is this the filter for the Nikon 300mm 2.8? The specs on lens say 52mm but the price is so much less than the 77 filters I'm not sure

A: I doubt it would fit on a 300mm. I have one on my 24mm f2.8 and another on my 50mm f1.8. Both are small lenses. Some of the Nikkor teles have a slot near the base of the lens for filters; there's sort of a drawer that pulls out of the base. I suspect that's the filter the specs are talking about. If you're buying this to protect the end glass, you'll need something larger.

Q: 4. 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: 5. The picture shows two sets, but the ad copy states set of 4 . Which is correct. Are there 4 pieces (2 sets), or are there indeed twice what is pictured - 4 sets?

A: There are four pieces, two sets.

Q: 6. 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: 7. Does "set of four" mean that I'll get 4 male and 4 female?

A: This set gives you 4 male clips and 4 female receivers.

Q: 8. Does this filter out UV (Ultra Violet) light? I contemplate use with full spectrum cameras.

A: The Nikon Neutral Clear Filter (67mm) is not a UV filter--it's a clear glass protective filter.

Q: 9. Will this cause vignetting or other issues if I connect it to a Tokina 11-16mm lens while using a crop-sensored Nikon d7100?

A: One filter will not vignette but if you stack 2 filters it will. Even at 11 mm the crop factor of 1.5X gives an effective focal length of 16.5 mm.

Q: 10. Are these archival? What are they made out of?

A: They are polypropylene and are acid free and archival.