Newtonian only has three screws near mirror
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Newtonian only has three screws near mirror
The avx 6" Newtonian only has three small screw heads on the rear behind the mirror, and none on the side in case the design was different. When I look inside I see two screws for each mirror clip plus three seperate screws holding the mirror. Worse, for some reason, the celestron manual for the avx has zero mention about how to collimate their scope, or even a diagram pointing out the parts. It's like they wanted to save money and only print or include a single generic manual to cover all the variants of scope and avx they sell. As for scopes, it only lists a table with the specs for each kind, and the "instructions" for each model basically just explain how to insert an eyepiece and turn the screw to hold it (seriously celestron?!). Does anyone have this model of scope or know what the deal is? I couldn't even find a picture of the rear of it through Google Image search hoping it would give me a clue. Oh, and celestron site does have a help article about collimation, but it's generic and applies to all Newtonians, and directly references the fact that there is supposed to be a lock screw and collimation screw together x 3 on the back
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Re: Newtonian only has three screws near mirror
Refractors: Meade AR-5 127mm f/9.3, Meade ST-80 f/5 and Meade 60mm f/12, Jason 60mm f/15 #313, Jason 60mm f/12 #306 S7, Bushnell Sky Chief III 60mm f/15.
Reflectors/Catadioptrics: Meade 10" F/4 Schmidt-Newtonian, Galileo 120mm f/8.3 Newtonian, Meade 2045D 4" f/10 SCT, Meade ETX-90EC f/13.8 & Sarblue 60mm f/12.5 Maksutov-Cassegrains.
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Re: Newtonian only has three screws near mirror
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1000101)
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Re: Newtonian only has three screws near mirror
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Re: Newtonian only has three screws near mirror
What colour is the tube?
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1000101)
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Re: Newtonian only has three screws near mirror
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Re: Newtonian only has three screws near mirror
My thoughts exactly, but the screws appear to be what is holding the mirror into the tube as it lines up exactly.Lady Fraktor wrote: ↑Sun Jun 07, 2020 7:15 pm That looks more like it is just a dust cover, have you removed it?
What colour is the tube?
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Re: Newtonian only has three screws near mirror
Anyway, I have seen lots of Newtons with only three screws at the back. As a matter of fact I build three of them myself.
In that case the mirror cell is spring-loaded. If you turn the screw the cell moves, turn it back and it returns to is former position.
Easily checked though. Point the telescope at a random target. Look through it. Give one screw 1/4 turn. If the image has shifted, it is a spring loaded cell. It it doesn't it is just the screw of a dust cover.
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Re: Newtonian only has three screws near mirror
I would tip it up so the mirror is the low point and get a driver but that is me
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1000101)
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Re: Newtonian only has three screws near mirror
An excellent point John, I did not even think of the possibility of them simply being spring loaded.John Baars wrote: ↑Sun Jun 07, 2020 7:42 pm
Anyway, I have seen lots of Newtons with only three screws at the back. As a matter of fact I build three of them myself.
In that case the mirror cell is spring-loaded. If you turn the screw the cell moves, turn it back and it returns to is former position.
Easily checked though. Point the telescope at a random target. Look through it. Give one screw 1/4 turn. If the image has shifted, it is a spring loaded cell. It it doesn't it is just the screw of a dust cover.
You would think Celestron would mention something about it though.
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1000101)
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Re: Newtonian only has three screws near mirror
Here's the link to the manual. https://s3.amazonaws.com/celestron-site ... _31056.pdf
Cheers,
JT
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Re: Newtonian only has three screws near mirror
I had an Orion 130 like that. I left it off thinking it might cool faster.
Behind that there were 3 knobs.
My
I prefer just 3 screws, my Mak has six drives me nuts LOL
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Re: Newtonian only has three screws near mirror
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Re: Newtonian only has three screws near mirror
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Re: Newtonian only has three screws near mirror
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