How to get 14 points star filter?

[sopons]

If you go here you will see that it has 14 points coming out of each light point. I am so new to this Star Filter thing. So, If anyone knows how to get this kind of effect on the picture? I would really want to know.

Thank you

[dannyrich]

i think you have to to use an aperture like 18+ to get the stars.

If you search on here there are a couple of threads.

[Major_Small]

I can't seem to find any evenly spaced 14-point filters. Cokin offers a 16-point star filter, and Tiffen offers the hyper star and hollywood star filters, which look like they generate about 14 points.

http://www.tiffen.com/star_filters.htm
http://www.adorama.com/ckp57.html

As to how they're used, you just apply them like any other filter on your lens, and turn them like a CPL to change the direction of the star points. Any point-sources of light will interact with lines in the filter that will create the pattern. I've never tried stacking them before, but that would be something to try. Although I don't think there are any 7-point filters to double up on to get to 14 points anyhow.

Something like this can also be done in post, but how depends on what software you use.

[JohnBrainard]

Those stars may just be a result of a long exposure. I don't have a star filter but was able to get some starts on street lights in this photo:

http://www.flickr.com/photos/dorkyph...80195/sizes/o/

Unfortunately, RawStudio didn't preserve the EXIF data so I can't tell you what the aperture and shutter speeds were. I'm pretty sure the aperture was around f/11 and the shutter speed measured in seconds. If I remember, I'll look tonight when I get home.

[sopons]

Originally Posted by JohnBrainard

Those stars may just be a result of a long exposure. I don't have a star filter but was able to get some starts on street lights in this photo:

http://www.flickr.com/photos/dorkyph...80195/sizes/o/

Unfortunately, RawStudio didn't preserve the EXIF data so I can't tell you what the aperture and shutter speeds were. I'm pretty sure the aperture was around f/11 and the shutter speed measured in seconds. If I remember, I'll look tonight when I get home.

That's really good to know. Because I feel like I couldn't find any star filter that has the effect. I would really love to see the EXIF data for that picture if you have it. Please post it back when you find the data. Thank you very much.

[JohnBrainard]

Originally Posted by sopons

That's really good to know. Because I feel like I couldn't find any star filter that has the effect. I would really love to see the EXIF data for that picture if you have it. Please post it back when you find the data. Thank you very much.

I'll e-mail myself a reminder to go look for it. One of these days I'm going to write a shell script to put the exif data back in my files!

[sopons]

I got the answer: Point & Shoot camera with 14 blades iris. He said. Oh my gosh!!!! He is super good!

[JohnBrainard]

Here's the EXIF from that image in case you still want it:

Camera Make: Canon
Camera Model: Canon EOS DIGITAL REBEL XTi
Image Date: 2008:06:23 23:55:11
Flash Used: No
Focal Length: 70.0mm
CCD Width: 22.28mm
Exposure Time: 15.000 s
Aperture: f/6.3
ISO equiv: 100
White Balance: Auto
Exposure: aperture priority (semi-auto)

[sopons]

Originally Posted by JohnBrainard

Here's the EXIF from that image in case you still want it:

Camera Make: Canon
Camera Model: Canon EOS DIGITAL REBEL XTi
Image Date: 2008:06:23 23:55:11
Flash Used: No
Focal Length: 70.0mm
CCD Width: 22.28mm
Exposure Time: 15.000 s
Aperture: f/6.3
ISO equiv: 100
White Balance: Auto
Exposure: aperture priority (semi-auto)

I got my 14 points star!!!!

[JohnBrainard]

Very nice! Where is that?