Dennis Sakva
Pooh-Bah
Reged: 10/19/04
Posts: 1303
Loc: Kiev, Ukraine
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I'll take "The messenger" role, John and Jerry be "The Makers", and Pavel "He who started it all" 
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Jerry3672
Vendor - Quantum Astronomy Products
Reged: 01/20/08
Posts: 498
Loc: Lexington NC
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No argument here.
Pavel Bahtinov is the “Master” of the cult.
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Meade LXD75-SN-8, SN-10, C11
DSI Pro
Canon XSi 450D unmod
www.spike-a.com Bahtinov Style Focus Mask
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TimberRock
journeyman
Reged: 11/15/07
Posts: 9
Loc: Central Texas
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Has anyone tried to print a mask on transparency film? If so, does it work?
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Timber Wolf
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lawrie
Carpal Tunnel
Reged: 01/31/06
Posts: 1742
Loc: Okanagan Valley
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Yes I have.
They print just fine, but don't work to well out in the field, they tend to dew up quite quickly, and if its cold the dew freezes. I ended up using them as templates, for cut outs on pail lids, which is fairly thick plastic.
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Clear Skies
Lawrie
Ultima 8
Atlas EQ-G
ZenithStar 80 FD
DSI Pro - Pro II
Canon 350D
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Trebor777
Hazy
Reged: 01/04/08
Posts: 1159
Loc: Connecticut - U.S.
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I made one for my 80mm APO. $2.79 at Staples - I purchased a heavy duty black folder.
Printed up a template on regular paper, cut it out with an exacto knife, traced it onto the black folder, cut that out with an exacto knife. It took me a little while to do all the cutting with the knife, but it came out perfect.
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- Randy
Telescopes (Solar too), Eyepieces, Mounts, Filters, CCD Cameras,
Astronomy Accessories, My Eyes, My Mind (Sometimes) and Hopefully Clear Skies.
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TimberRock
journeyman
Reged: 11/15/07
Posts: 9
Loc: Central Texas
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When there is no dew on them, do they work well or....?
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Timber Wolf
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greeps
member
Reged: 02/04/06
Posts: 52
Loc: Chattanooga, TN
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Jerry, I just got my Spike-a-com Bahtinov mask this morning. It's outstanding. It's rigid, sturdy, easy to attach, and looks like it'll last forever. Great job. Thanks.
David
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smokin oakum
Pooh-Bah
Reged: 09/24/07
Posts: 1497
Loc: Wilmington, NC
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Hi all...I just thought that the group would like to see this masks result with a Mallincam video camera. It truly make focusing a snap
Neil
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Broadcasting live views of the night sky @
Sparkcast
C11 CGE / Hyperstar
MallinCam Hyper Plus Color
Orion 12" XTi f/4.9
MoonLite Focuser
Round Table Platform
12" Parralax rings
Cape Fear Astronomy Club
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bill w
Postmaster
Reged: 03/26/05
Posts: 6571
Loc: southern california
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figured i'd give this thread a bump as someone asked what i used for my FS 60C
i used the bahtinov mask generator here:
http://astrojargon.net/MaskGenerator.aspx
using FL 354 aperture 60 bahtinov factor 50
to generate the mask:
http://whwastro.homestead.com/files/temp/bahtinov_FS60C_FL354_BFact_50_.svg
printed on normal paper with inkscape (freeware), cut out with an exacto knife on a plastic cutting board, and cut out a bread crumb container for the cylinder (had to open the cylinder as it wasn't quite big enough).
it isn't pretty:
but it gives a nice focus pattern, even using the reducer at different FL:
as mentioned before
don't use on DSO's
Edited by bill w (02/10/09 02:50 PM)
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Dr Benway
sage
Reged: 03/27/08
Posts: 309
Loc: Abilene, TX
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I made one a few weeks ago for use with my C8 Hyperstar3. I like it a lot better than the Hartmann Mask.
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Vixen R130SF
Orion ST80
Orion ST120
Celestron Onyx 80EDF
Celestron C8 XLT/Hyperstar3/QHY8
iOptron Mini-Tower (Trapezium Gold Standard)
Losmandy GM-8
Meade 16" LightBridge/ServoCAT/Argo Navis
Oberwerk 20x80LW binos
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amateur
sage
Reged: 06/15/06
Posts: 300
Loc: The Netherlands
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Almost the same, achieved with minimal means: Bahtinov wires
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astrokido
space wanderer
Reged: 06/09/08
Posts: 660
Loc: Phoenix, AZ
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I got some good results with a 210mm f/4 camera lens and the free 66ED mask template from Focus-Mask which was sized just right. Here's a shot of Venus with it from tonight:
Taken at ISO200, 2sec, f/4. The mask didn't work at shorter FLs but I'm going to make a thinner one and see what happens.
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- Gill C. - Celestron Cometron CO-100, 10x25, 20x80, Binochair, Nikon D40
The Night Sky Atlas: www.nightskyatlas.com
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starbob1
sage
Reged: 03/11/07
Posts: 380
Loc: IN
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Where can one get a Bahtinov mask for a TSA 102MM.Thanks
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Tak Shack Observatory
Tak Tsa 102 apo
Vixen GPDX
Discovery 12.5 PDHQ
350D modified
CGE MOUNT
ST-80
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raf1
super member
Reged: 11/18/05
Posts: 145
Loc: Texas
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Go here:http://www.focus-mask.com/index.html
Darrell can make about any mask you need.
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-Ron
****************************
Too much "stuff" and too little time to use it .....
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starbob1
sage
Reged: 03/11/07
Posts: 380
Loc: IN
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Thanks RAF1
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Tak Shack Observatory
Tak Tsa 102 apo
Vixen GPDX
Discovery 12.5 PDHQ
350D modified
CGE MOUNT
ST-80
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Freddy WILLEMS
Carpal Tunnel
Reged: 11/13/05
Posts: 2535
Loc: Hawaii, Honolulu
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I did not read the whole threat, but is there somebody who can make one for a C14" ?
I do not have the materials but if that person or company has Paypal I would love to order one.
Shipped to Hawaii.
Freddy
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Freddy
Meade 14" LX200 GPS UHTC GPS on permanent pier
Celestron C 14" Peltier cooled for planetary imaging.
Meade 10" LX200 & TITAN 50:1 mount Gemini 'go to'
Meade 127 mm f/9 APO & TITAN 50:1 mount Gemini 'go to'
W/O 102 mm f/7 APO doublet
Orion 80 mm f/7 ED
DFK 21AU04.AS
ToUcam 840 II pro
Canon 10D Unmoddified
Canon 40D Hutech moddified
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Dennis Sakva
Pooh-Bah
Reged: 10/19/04
Posts: 1303
Loc: Kiev, Ukraine
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No need to read 25 pages... Read last two comments 
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John Wunderlin
Vendor - Spike-a Focusing Mask
Reged: 10/01/04
Posts: 690
Loc: Mineral Point, Wi
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Quote:
I did not read the whole threat, but is there somebody who can make one for a C14"
We have made several masks of this size and have some being cut in the next week. PM me if you're interested.
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John Wunderlin
Vendor - Spike-a Bahtinov Focusing Mask
Empire Ranch Observatory
Iowa County Astronomers
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Dennis_Oz
sage
Reged: 08/20/06
Posts: 302
Loc: Brisbane, Australia
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Here’s the "Digital" interpretation on CN Solar System Imaging & Processing…
Cheers
Dennis
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Chris Lord
member
Reged: 09/26/04
Posts: 52
Loc: Cambridge UK
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In all this enthusiasm, and mass production, has anyone actually run an FFT on the Bahtinov mask?
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