Diamond cut from crystal-clear, water-white optical glass, Schneider filters are ground and polished to a precise flatness and planeparallelism (exact parallel relationship between front and back filter surfaces). Then, to ensure perfection, this is verified by a laser interferometer. Schneider filters are then checked with a densitometer for consistent density, and tested with a spectrophotometer for proper light transmission. It's due to this ultra-high consistency, that allows cinematographers to swap like filters mid-shoot with no discernible variation in color or effect. What's more, the unprecedented purity, color saturation and repeatability of Schneider filters virtually eliminate the need for lab color timing correction.

• Consistent precision
• Ultra durability
• Schneider filters work with long lenses

Diamond cut from crystal-clear, water-white optical glass, Schneider filters are ground and polished to a precise flatness and planeparallelism (exact parallel relationship between front and back filter surfaces). Then, to ensure perfection, this is verified by a laser interferometer. Schneider filters are then checked with a densitometer for consistent density, and tested with a spectrophotometer for proper light transmission. It's due to this ultra-high consistency, that allows cinematographers to swap like filters mid-shoot with no discernible variation in color or effect. What's more, the unprecedented purity, color saturation and repeatability of Schneider filters virtually eliminate the need for lab color timing correction.

Schneider filters stand up to the most rigorous demands on set or location. Many feature Schneider's specially formulated hard anti-reflective (AR) coating to resist flaking, peeling and scratching. This proprietary coating also reduces light loss and flare to less than 1% per surface, compared to untreated glass that has a light loss of 4% per surface. Schneider screw-in filters feature virtually jam-proof brass precision mounting rings, while unmounted Schneider laminated filters are protected against delamination and edge-chipping by Schneider's unique Edge Seal, which also reduces edge reflection and edge flare.

The common perception among photographers and cinematographer's is that filters should not be used in front of long length lenses, due to the critically short depth of field of these lenses. This belief is often confirmed when poorly made glass or "plasticresin" filters are placed in front of a long lens, and the degradation of the image is visible simply by looking through the viewfinder. This degradation is caused by poor quality control, low-quality glass and poor glass grinding and polishing techniques used in the manufacture of such filters. Schneider filters have no such problems, and can be used in front of even the longest lens. Diamond-cut from high-quality optical glass, then ground and polished to precise lens-making standards, Schneider filters offer unsurpassed clarity, light transmission and color saturation with absolutely no visible compromise of image quality. Even when stacked, they are the clear choice for use with any lens.

Related Questions and Answers

Q: 1. If I have a standard camera tripod and DSLR, can I go straight into photographing the Moon, Orion Nebula, etc., without purchasing *anything* else, or must I also get the counterweight, any kind of wedge, ball head, etc. for it to be a complete setup? I am comparing this to iOptron and need to know what else is required.

A: Using a DSLR should not require you to use a counterweight unless the camera and lens combo approaches the 11 pound threshold. I purchased all of the accessories just in case they were needed I'd have them to use. I only use the counterweight when affixing my ETX to the ball head. Depending on the total weight of the camera and lens, coupled with the stability of the tripod you have, you may want to have some form of counterweight, even if just for the tripod itself, to ensure steady images.

Q: 2. What’s the full package size and weight? Need to know to ask a friend to bring it to me.

A: The box is 44 x 12.88 x 12.5 inches and weighs 26 pounds.

Q: 3. What's the cable model to connect tracker to camera to user with intervalometer?

A: The cable will attach to the camera body directly. Need to know make and model of the camera.

Q: 4. How tall is the tripod?

A: The Sky-Watcher Star Adventurer GTi Mount Kit (with Tripod and Pier Extension) BH #SKSAGTIMK • MFR #S20595 has a Height Adjustment Range of 26.8 to 44.5" / 68.1 to 113 cm

Q: 5. How long do batteries last at full power & which brand/model of 18650 give you best bang for buck? thx marty

A: With 4 of the Nitecore 18650 Li-Ion Rechargeable Battery (3.7V, 3400mAh) B&H # NINL1834 batteries installed in this light, you can get about 1 hour of run time at full power. https://bhpho.to/2CfjhYc

Q: 6. Can this unit be used with film cameras?

A: Yes, really no different than a digital camera but if you have them I'd recommend staying within parameters established for a like focal length and ASA/ISO value just for ballpark exposure.

Q: 7. Can you use a power source other than AA batteries?

A: When using the Sky-Watcher Star Adventurer GTi Mount Kit the user will be able to also use the Celestron PowerTank Lithium LT Power Pack,(BH #CEPTLLTPP), instead of the AA batteries..

Q: 8. Does it come with carrying case?

A: No. It doesn't.

Q: 9. Can any cable for Nikon cameras (such as 10 pin, MC DC1/2) be used with the GTi or should only the Sky Watcher version be used?

A: The Sky-Watcher Star Adventurer GTi Mount Kit can be used with this Vello Nikon 10 pin cable: https://bhpho.to/3eFlHmI

Q: 10. What kind of plate do is needed to mount a DSLR to this mount? And where can one be obtained? What is the part name and number?

A: The Sky-Watcher Star Adventurer GTi Mount Kit (with Tripod and Pier Extension) can work with either plate; Losmandy V-Series Dovetail Plate (4"), B&H # LOVUP4 MFR # VUP4, https://bhpho.to/4ahw3CZ Or iOptron 7" Vixen Style Universal Dovetail Plate, BH #IO8422178, https://bhpho.to/4cjBtzp And you should get this as well, Oben 1/4"-20 Screw with D-Ring for QR Plates (https://bhpho.to/49TJFoi).