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wrather1
AstroBear
Reged: 10/25/05
Posts: 4158
Loc: Dallas, Texas
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I have always used a Stiletto focusing tool for imaging with my refractors.
Recently I tried it on my RCX, and I can't seem to achieve perfect focus with it. The central obstruction is huge, and takes up most of the view in the Stiletto's eyepiece.
Anyone have any suggestions?
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"Don't worry about what telescope you own, or its quality. Just get out under the night sky, and enjoy God's wondrous universe." - T. M. Back
Meade RCX400-12 "Ursa Major"
TMB 130SS + EQ6-PRO "Ursus Polaris"
Orion ED80 "Ursa Minor", WO ZS66ED "grab-'n'-go"
EOS 30D (Hutech), ToUcam Pro, Star Shoot Autoguider, Meade DSI
North Texas Clear Sky Chart
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quantumac
sage
Reged: 12/17/07
Posts: 493
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I use a Bahtinov mask, and it works rather well. There is no guessing with such a mask. You simply adjust the focus on a star until the three diffraction lines intersect.
You can make one yourself (there are online templates you can use), or you can purchase one.
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Scope: Meade 10" LX200R
Guide/Planetary Camera: Imaging Source DBK41AF02.AS
DSO Camera: QHY8
Guide Hardware: Celestron OAG, Shoestring Astronomy GPUSB
Software: Mac OS X, Starry Night Pro, Nebulosity, PHD Guiding, PixInsight, Astro IIDC. No Windows anything.
Edited by quantumac (11/16/09 03:00 PM)
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wrather1
AstroBear
Reged: 10/25/05
Posts: 4158
Loc: Dallas, Texas
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Yes, i have certainly heard of these - what would be a good source for a 12" version?
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"Don't worry about what telescope you own, or its quality. Just get out under the night sky, and enjoy God's wondrous universe." - T. M. Back
Meade RCX400-12 "Ursa Major"
TMB 130SS + EQ6-PRO "Ursus Polaris"
Orion ED80 "Ursa Minor", WO ZS66ED "grab-'n'-go"
EOS 30D (Hutech), ToUcam Pro, Star Shoot Autoguider, Meade DSI
North Texas Clear Sky Chart
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quantumac
sage
Reged: 12/17/07
Posts: 493
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Can't really comment on the "goodness" of a commercial Bahtinov, since I made my own mask out of foamboard and a cheap wooden loom. I know there are outfits which make metal masks.
Here's a site that will generate a template you can use to make your own:
http://astrojargon.net/MaskGen.aspx?AspxAutoDetectCookieSupport=1
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Scope: Meade 10" LX200R
Guide/Planetary Camera: Imaging Source DBK41AF02.AS
DSO Camera: QHY8
Guide Hardware: Celestron OAG, Shoestring Astronomy GPUSB
Software: Mac OS X, Starry Night Pro, Nebulosity, PHD Guiding, PixInsight, Astro IIDC. No Windows anything.
Edited by quantumac (11/17/09 05:32 PM)
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ghostrunner007
member
Reged: 11/13/04
Posts: 83
Loc: Alberta,Canada
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I got my 12" one from Kendrick Astro. Its a very well made
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