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Thursday, December 07 2023 @ 02:42 am EST


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 Bahtinov Mask
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LME
 Wednesday, January 21 2009 @ 10:57 pm EST (Read 3779 times)  
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Hey all,

A few months ago I mentioned to some of you about a focusing mask I made to assist my CCD camera focusing. And I must say this mask is amazing! I can achieve perfect focus (perfect in my eyes) in 30-45 seconds with no guess workÖ

The inventor of this wonderful tool is a respected Russian Astrophotographer Pavel Bahtinov (any one speak Russian?) and he deserves all the credit.

It is easy to make, mine was made from foam board material and then spray painted flat black. I think I have around $6.00 invested. Looking at the attached picture you will see that it does take a little effort with a knife, but it is well worth it. And if you think it would be too much work or donít have the timeÖ search the web and you will find vendors ready to take your order.

How does it work? Like most other masks. I simply place the mask in front of my secondary using cut pieces of weather striping so that it fits snug in the OTA, just like the dust cover. I slew to a star, if I havenít already and use the zoom tool on my capturing software, adjust focuser and in seconds Iím done and ready to snap some DSOís. This can be used for visual as well, but one needs to find a nice bright star.

If anyone is interested in making their own, I still have foam board left and will gladly let you have some at no charge.

You can also download a Mask Generator it will calculate the slot widths according to aperture size and enable you to print your own template.

Iíve attached some images of what exactly youíll see on your monitor, laptop or EP

Intrafocal

Focus

Extrafocal




Clear Skies-Larry
 
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dgrosvold
 Thursday, January 22 2009 @ 01:47 am EST  
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Cool tool, Larry! That sure looks like it would make focusing easy. Cool


Dave - Morrow, AR
 
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lrjarhead
 Thursday, January 22 2009 @ 03:02 am EST  
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Larry,
Great article - thanks.
I can't print the mask overlay 'cause my printer can only handle 8X11, which isn't large enough for my 8", probably stuck with doing the "commercial" thing - shucks!
Warm regards,
Mike Oops!


 
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nspace01
 Thursday, January 22 2009 @ 04:32 pm EST  
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We could make them out of cast iron and sell them as "Manhole Covers"

He...............He............... Laughing Out Loud


nSpace01
 
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LME
 Thursday, January 22 2009 @ 07:55 pm EST  
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Are you implying that my newt is a sewer pipe? LOL Good one Leonard!


Clear Skies-Larry
 
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cristiano
 Wednesday, June 10 2009 @ 10:41 pm EDT  
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Hello there.Nice to meet you again guys.It is easy to make, mine was made from foam board material and then spray painted flat black. I think I have around $6.00 invested. Looking at the attached picture you will see that it does take a little effort with a knife, but it is well worth it. Please try it at home!!!!!!!!!
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