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About LinkBacksI've seen two choices in the 2" sight tube/Cheshire combo market -- the Lightpipe and the Catseye.
Anyone have a preference for one or the other?
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Thread: 2" collimating tool
- 12-07-2010, 07:51 PM #1
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2" collimating tool
Fly me to the moon, let me play among the stars -- Sinatra
Older Discovery 12.5 solid tube dob, Orion 120mm refractor, non-go-to mount, eyepieces are 40mm and 32mm Orion Highlights, 25mm and 10mm Orion stock, 17mm Sterling, 12.5mm Baader, and 7.5mm Orion Ultrascopic, all housed in 8X10 Sky Shed
- 12-08-2010, 07:02 AM #2
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Catseye is renowned for being the most precise collimating tool. I myself use Cheshire - because of my Bird-Jones Celestron.
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- 12-08-2010, 07:05 AM #3
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- 12-08-2010, 03:20 PM #4
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Thank you for your suggestion.
Originally Posted by mplanet62 
Fly me to the moon, let me play among the stars -- Sinatra
Older Discovery 12.5 solid tube dob, Orion 120mm refractor, non-go-to mount, eyepieces are 40mm and 32mm Orion Highlights, 25mm and 10mm Orion stock, 17mm Sterling, 12.5mm Baader, and 7.5mm Orion Ultrascopic, all housed in 8X10 Sky Shed
- 12-09-2010, 06:29 PM #5
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I will probably go with the Catseye, but here's another question:
The combination sight tube/Cheshire is less expensive than buying a sight tube and also buying a separate Cheshire. Is there any really, really good reason to buy these tools as separate items?Fly me to the moon, let me play among the stars -- Sinatra
Older Discovery 12.5 solid tube dob, Orion 120mm refractor, non-go-to mount, eyepieces are 40mm and 32mm Orion Highlights, 25mm and 10mm Orion stock, 17mm Sterling, 12.5mm Baader, and 7.5mm Orion Ultrascopic, all housed in 8X10 Sky Shed
- 12-10-2010, 12:07 PM #6
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Another to look at would be the Hotech 2" laser collimator...That, and a 2" collimation cap and you're set.
Allen
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XT8 Classic/Baader Hyperion 24mm and 13mm EP's
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- 12-10-2010, 01:16 PM #7
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I would not think so. As for a laser collimator - sources say that it is possible to adjust primary with the secondary noticeably askew in the way that the beam returns to bullseye. Do not know if it's true - I just prefer seeing and understanding rather than doing anything automatically. Laser is also useless with my Bird-Jones (what a chore!). Originally Posted by rwsandy
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- 12-10-2010, 03:01 PM #8
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I have not been able to find a 2" collimation cap anywhere on the market. I would prefer to buy one, since I'm not much of a fabricator. Originally Posted by porkchopsisgood
I also prefer the 2" cap to avoid the "slop" issue in my adapter.
Where can I buy one?Fly me to the moon, let me play among the stars -- Sinatra
Older Discovery 12.5 solid tube dob, Orion 120mm refractor, non-go-to mount, eyepieces are 40mm and 32mm Orion Highlights, 25mm and 10mm Orion stock, 17mm Sterling, 12.5mm Baader, and 7.5mm Orion Ultrascopic, all housed in 8X10 Sky Shed
- 12-10-2010, 05:12 PM #9
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To be honest, I'm looking for one myself...but I've used one at a local star party.
If someone would be so kind as to mention brand that would be great.Allen
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- 12-10-2010, 09:04 PM #10
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Actually, since an autocollimator has a center hole, I wonder if it could serve double duty as a basic collimation cap? I don't own one, so I don't know.
Fly me to the moon, let me play among the stars -- Sinatra
Older Discovery 12.5 solid tube dob, Orion 120mm refractor, non-go-to mount, eyepieces are 40mm and 32mm Orion Highlights, 25mm and 10mm Orion stock, 17mm Sterling, 12.5mm Baader, and 7.5mm Orion Ultrascopic, all housed in 8X10 Sky Shed
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