Which is the best alternative to the Bahtinov Mask - Carey or Tri?

The Bahtinov mask is a name-sake in focusing masks for telescopes and telephoto-lenses for DSLR astrophotographers. However its not the only option out there and depending on your telescope and need the Carey mask or the Tri-Bahtinov Mask may be the better choice!

Follow these Links to Generator your own Focusing Mask!
Bahtinov Mask Generator: http://astrojargon.net/MaskGen.aspx
(Astrojargon is down check out this alternative - http://www.deepskywatch.com/Articles/...) also there is a PC version available here ( https://drive.google.com/drive/folder...)

Carey Mask Source Files: http://www.geoastro.co.uk/careymask.htm

Tri-Bahtinov Mask Generator: http://svg2.mbsrv.net/astro/Tri-Bahti...

Giveaway Contest Official Rules: https://emberskymedia.com/official-gi...

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