Meade 2045D Visual Back/ Reducer Question

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StarBru United States of America
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Meade 2045D Visual Back/ Reducer Question

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Post by StarBru »

I have a Meade 2045D 4" f/10 telescope and I want to buy a Meade f/6.3 Reducer for it. The scope has a 1.25" visual back with outside threads. The reducer has outside and inside threads on it, but I am not sure if the inside threads are the right size or if they are to attach to the outside threads of the visual back. My question is: does anyone know how I would attach the reducer on the scope? Pictures below:
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Bruce

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.
Mounts: Skywatcher EQ6-R Pro & Meade LXD55 Equatorial mounts, ES Twilight II and Meade 2102 ALT/AZ mounts, a modified 10" SkyQuest Dobsonian mount, various 60mm EQ mounts.
Misc: Celestron 20x80mm binoculars, Revolution II Imager/accessories, & lots of optical accessories/eyepieces.
Projects: 8" f/2.9 and 65mm f/10 reflectors, Dobson-style binocular mirror mount.
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depratnt United States of America
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Re: Meade 2045D Visual Back/ Reducer Question

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Post by depratnt »

So the order from SCT to eyepiece is as follows: SCT-REDUCER-VISUALBACK. The wider threads will attach directly to the backend of the SCT and then the visual back will attach to the smaller threads of the reducer.
Scopes: GSO 8rc
Mount: iOptron CEM60
Camera: ASI1600mm-PRO
Guide cam: QHY5L-ii monochrome
Filters: Astrodon Ha/Oiii )3nm) / LRGB
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yobbo89 Australia
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Re: Meade 2045D Visual Back/ Reducer Question

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Post by yobbo89 »

do you have a link to the reducer ? also what is the diameter on the scopes back end, ie the "sct thread" i see a threaded 1.25'' adapter you have that screws onto the sct. a good tool to have is a thread pitch gauge.
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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StarBru United States of America
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Re: Meade 2045D Visual Back/ Reducer Question

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Post by StarBru »

depratnt wrote: Fri Dec 13, 2019 9:37 pm So the order from SCT to eyepiece is as follows: SCT-REDUCER-VISUALBACK. The wider threads will attach directly to the backend of the SCT and then the visual back will attach to the smaller threads of the reducer.
Thank you, that makes more sense than how I had it figured. For some reason, I was thinking the reducer went between the visual back and the diagonal!
Bruce

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.
Mounts: Skywatcher EQ6-R Pro & Meade LXD55 Equatorial mounts, ES Twilight II and Meade 2102 ALT/AZ mounts, a modified 10" SkyQuest Dobsonian mount, various 60mm EQ mounts.
Misc: Celestron 20x80mm binoculars, Revolution II Imager/accessories, & lots of optical accessories/eyepieces.
Projects: 8" f/2.9 and 65mm f/10 reflectors, Dobson-style binocular mirror mount.
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StarBru United States of America
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Re: Meade 2045D Visual Back/ Reducer Question

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Post by StarBru »

yobbo89 wrote: Fri Dec 13, 2019 9:41 pm do you have a link to the reducer ? also what is the diameter on the scopes back end, ie the "sct thread" i see a threaded 1.25'' adapter you have that screws onto the sct. a good tool to have is a thread pitch gauge.
The reducer is used and for sale on Cloudy Nights classifieds. I measured my visual back on the 4" SCT with a tape measure in inches and then transposed it to millimeters, not very accurate I know! My best guess is 47.63 mm for the male threads on the OTA where the visual back screws on to the OTA. On the eyepiece side where the diagonal is inserted, I measured 33.34 mm for the male threads there. I really don't know what use it is for except maybe some type of camera connection? The diagonal does not screw into it. I use a regular diagonal that just inserts like an eyepiece would. I have the original instruction manual for the scope, but strangely enough there is no information about the thread sizes.
Bruce

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.
Mounts: Skywatcher EQ6-R Pro & Meade LXD55 Equatorial mounts, ES Twilight II and Meade 2102 ALT/AZ mounts, a modified 10" SkyQuest Dobsonian mount, various 60mm EQ mounts.
Misc: Celestron 20x80mm binoculars, Revolution II Imager/accessories, & lots of optical accessories/eyepieces.
Projects: 8" f/2.9 and 65mm f/10 reflectors, Dobson-style binocular mirror mount.
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StarBru United States of America
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Re: Meade 2045D Visual Back/ Reducer Question

#6

Post by StarBru »

Unfortunately, the reducer just sold on Cloudy Nights. These come up for sale from time to time and the only reason I have never bought one is because I wasn't sure how they connected!
Bruce

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.
Mounts: Skywatcher EQ6-R Pro & Meade LXD55 Equatorial mounts, ES Twilight II and Meade 2102 ALT/AZ mounts, a modified 10" SkyQuest Dobsonian mount, various 60mm EQ mounts.
Misc: Celestron 20x80mm binoculars, Revolution II Imager/accessories, & lots of optical accessories/eyepieces.
Projects: 8" f/2.9 and 65mm f/10 reflectors, Dobson-style binocular mirror mount.
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