Tiffen 6.6 x 6.6" 6 Point/3mm Grid Star Effect Glass Filter create multiple points of light, or "stars," streaking outward from a central light source. This can make lighting within the scene take on a more glittering, glamorous appearance. This effect is produced by a series of thin lines etched into the flat optical surface of a clear filter.

The size and brightness of the star lines produced are first a function of the size, shape, and brightness of the light source.

You have additional control through the choice of a particular spacing between the lines on the filter; These spacings are measured in millimeters and range from 1mm to 4mm

A 1mm spacing has twice as many lines as a 2mm spacing; It will produce a brighter star for any given source

Lines in one direction produce a two-pointed star, just a streak through the center of the light

Tiffen offers 4, 6, and 8 point symmetrical star effects as well as additional asymmetrical star patterns through their exclusive Hollywood FX Series (North, Hyper, Vector and Hollywood star effects)

With an 8 point filter, the many star lines may tend to overpower the rest of the image, so use it carefully

Generally, mid-range apertures or larger are sufficient to achieve a good star effect; Always test before critical situations

Related Questions and Answers

Q: 1. 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: 2. Does this package include the EQ wedge and counter weight?

A: No this model does not come with the EQ Wedge, and the Counter Weight. They are sold separately.

Q: 3. 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: 4. Does this have a built-in intervalometer?

A: Sky-Watcher Star Adventurer GTi Mount Kit (with Tripod and Pier Extension) intervalometer is available in the app that you run on your smartphone. You also need to purchase a shutter release cable separately that connects from the camera to the tracker.

Q: 5. Which plate will my Sony Alpha A7RIV or A7RV require to adapt to dovetail?

A: The original Star Adventurer and 2i included the "Sky-Watcher Star Adventurer Ball Head Adapter", which worked with any DSLR or mirrorless camera: bhphotovideo .com /c/product/1092110-REG/ I have a Tamron 150-600mm lens with arca-swiss compatible grooves, if it doesn't work when I get this tracker, I'll tell you, I guess you have to get a Vixen type (V-type) dovetail plate to DSLR.

Q: 6. What else do I need to buy to be able to do Ap with long exposures? 5 min

A: People mentioned a ball head. I don't have one and wish I did with this tracker. Also, for aligning with Polaris, being able to keep my tripod stationary and spin the tracker on top would make it SO much easier to align. These are my two suggestions. Get the wedge too, that's a must.

Q: 7. how do you install it?

A: To install the Westcott Glass Dome for FJ400 Flash Head, with one hand wrap the dome around two of the metal tabs located around the flash tube. Then with your other hand use your thumb and pointer finger to push inward on the other two metal tabs and push the glass dome down and around.

Q: 8. Would I need two ball heads for panorama of the Milky Way arch? My gear I’m using is a Nikon D850 with 14-24 2.8

A: For the Sky-Watcher Star Adventurer GTi Head Kit (Head Only), it would be recommended to use 2 ball heads when shooting the Milky Way arch.

Q: 9. 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: 10. 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