Tiffen 4 x 4" 4 Point/2mm 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. Is there a way to use this filter with the HITECH HT85AMH filter holder.? What accessory pieces do I need to adapt the holder for this filter?

A: You need to adjust the thickness of one slot to match this filter, then it will slide in the same as a rectangular filter.

Q: 2. Are these filters stackable ? let's say i want to reduce light pollution but i want light streaks or i want ND & CPL same time

A: The Neewer ND & Effect Filter Kit for DJI Air 3 (10-Pack) are not available for stacking.

Q: 3. Does this work for daylight and reversal films like Kodak Portra 160 / 400 and Provia 100F?

A: Yes this can work when shooting daylight balanced color negative or positive films.

Q: 4. My Cokin P Series Holder accepts the Cokin P164 Circular Glass Filter, and I the 77m adapter ring fits as well. However, the filter does not turn easily and the adapter ring allows the holder to spin easily. What has anyone done to make these parts work as they should?

A: If the filter is truly hard to turn and you are still in 30 days from B&H, you should contact B&H Customer Service to see if you can exchange it. As far as dealing with the holder spinning, I would suggest trying spinning of the filter in the opposite direction, the direction use to tighten the 77mm adapter.

Q: 5. Hi,is this filter can be on the Leica Summilux C T1.4 Primes???http://gulfcamera.com/leica-summilux-c-t1-4-primes/There are our lens type

A: Yes, this filter can fit a Leica Summilux C T1.4 prime lens.

Q: 6. What thread pitch has this filter?

A: The pitch on the FTG127C is .75.

Q: 7. Will this filter fit the Cokin Z-Pro Filter Holder?

A: This is the P CPL filter which is small than Z-PRO.

Q: 8. I have a canon EFS 18-55mm lens that I want to put a portrait glass filter on. Which filter is the correct one for my lens?

A: Your lens would have a 58mm filter thread. This model would be correct:Hoya 58mm Portrait Glass FilterB&H # HOP58Q ? Mfr # S58PORTRAIT

Q: 9. Again, will this filter at 4mm fit my existing nisi filter holder and does it come with a leatherette filter pouch?

A: The NiSi Star Soft Astrophotography Filter (100 x 150mm) will fit in any filter holder that supports 100mm wide filter with a 2mm thickness such as the NiSi 100mm System V5 or V5 Pro or NiSi V6 100mm Filter Holder. It does come with the leather case.

Q: 10. Hello, what holder do I need to buy that the filter will fit in it? Thank you

A: This is designed for the Cokin P filter holder. http://bhpho.to/1uFxRzB