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Arctic_Eddie
professor emeritus
Reged: 12/30/07
Posts: 599
Loc: St. Petersburg, FL
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Send a request to the moderator. That's what I did. The sticky may still have to be dropped if there's no more reader interest.
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The shortest distance between one point is an infinitely small circle.
73's de KF4JU
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RAKing
Carpal Tunnel
Reged: 12/28/07
Posts: 2083
Loc: West of the D.C. Nebula
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Quote:
How about also placing (Ron King's) "Ron's Rail" as a "Sticky" here ? It's surely an equally excellent and simplistic solution to the all too common, "base of the mount" clearance problem.
It would be a great shame if this clever idea were to get lost to us, concealed by the day by day ever increasing number of threads.
Tel,
Thanks for the flattering comments. But the simple truth is I originally planned to do exactly what Eddie did. I planned to mill a set of ADM blocks I have in the basement and feel these would be a "proper" solution.
Necessity is the Mother of Invention and my idea of stacking a short dovetail on the original SE dovetail happened when I ran out of daylight and needed something that worked THAT NIGHT!!! The lightbulb went on right above my head, I grabbed the dovetail piece -- and darned if it didn't work. 
Thanks again to Eddie for proving the concept - and thanks to everyone for the friendship and encouragement on this cool forum.
Ron
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Time spent looking at the stars is added to your life.
Tak FS-128, C925-CF, C6SE, other stray cats and refractors.
A-P Mach1 GTO
Zeiss orthos to Ethos - and some stuff in between.
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Tel
Post Laureate
Reged: 03/31/06
Posts: 3974
Loc: Wallingford England
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Hi Ron,
Praise well deserved in my opinion ! My thoughts were directed to its relative simplicity.
Fabricating ADM blocks may well be preferable but obviously not many of us have either a workshop, access to one or the necessary skills to perform the task.
I think the decision to propose this great idea as a "Sticky" should be yours as its originator, but I for one, support it wholeheartedly and I'm sure I'm not alone in this. 
Best regards,
Tel
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Truth is the cubed root of Verbosity.
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Arctic_Eddie
professor emeritus
Reged: 12/30/07
Posts: 599
Loc: St. Petersburg, FL
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Ron's idea should also be a sticky like mine. The fact that both may get dropped in the future suggests a sticky archive as I proposed to the moderator. It would be an excellent place to store "neat" ideas so that a search would be much easier.
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The shortest distance between one point is an infinitely small circle.
73's de KF4JU
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brmillsy
member
Reged: 07/29/09
Posts: 42
Loc: Wheatfield, NY
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Quote:
Russ, these off-the-shelves would work with your 8i:
Dovetail bar:
http://www.amazon.com/Orion-13-Dovetail-Mounting-Plate/dp/B000YPTZU2/ref=sr_1_1?ie=UTF8&s=photo&qid=1243365696&sr=1-1
Curved blocks:
http://astronomics.com/main/product.asp/catalog_name/Astronomics/category_name/CUHH9F3HKV579LMJ8CC9R6WV80/product_id/VCB8
Used it on my Nexstar 8. Clear skies.
Best,
Hi all:
Does anyone know if this configuration would work on a nexstar 8SE. Also if anyone has done it do they have any pictures and/on the procedure to make the installation? Do you need to drill into the optical tube?
Trying to extend the mounting rail enough to use my Denk S1 powerswitch but I don't have the capabilities to machine anything as in the eddies rail solution.
Any help would be appreciated.
Thanks a lot.
Brian.
--------------------
Nexstar 8SE
Plossols: 4mm, 6mm, 9mm, 15mm, 25mm, 32mm
Naglers: 5mm, 7mm
Ethos: 13mm
UHC filter, Moon filter, Colored filters
Dewshield, Powertank, 2X Barlow,
F/6.3 focal reducer, JMI motorfocus
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Arctic_Eddie
professor emeritus
Reged: 12/30/07
Posts: 599
Loc: St. Petersburg, FL
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I don't believe the hole spacing is the same. I believe Ray's Bracket was intended for the 8SE and there may also be something from Losmandy that will work. It's really nice having the rail extend back so some rather bulky objects can be mounted and still get clearance at zenith.
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The shortest distance between one point is an infinitely small circle.
73's de KF4JU
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ibase
Carpal Tunnel
Reged: 03/20/08
Posts: 1538
Loc: Manila, Philippines 121*E 14*N
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Quote:
Quote:
Russ, these off-the-shelves would work with your 8i:
Dovetail bar:
http://www.amazon.com/Orion-13-Dovetail-Mounting-Plate/dp/B000YPTZU2/ref=sr_1_1?ie=UTF8&s=photo&qid=1243365696&sr=1-1
Curved blocks:
http://astronomics.com/main/product.asp/catalog_name/Astronomics/category_name/CUHH9F3HKV579LMJ8CC9R6WV80/product_id/VCB8
Used it on my Nexstar 8. Clear skies.
Best,
Hi all:
Does anyone know if this configuration would work on a nexstar 8SE. Also if anyone has done it do they have any pictures and/on the procedure to make the installation? Do you need to drill into the optical tube?
Trying to extend the mounting rail enough to use my Denk S1 powerswitch but I don't have the capabilities to machine anything as in the eddies rail solution.
Any help would be appreciated.
Thanks a lot.
Brian.
Found this image of an 8SE showing what's beneath the dovetail cover:
From the looks of it, there are 2 mounting holes at the back side (near the diagonal) of the optical tube (OTA). If you can confirm by measuring the space between the 2 holes as having a 1.75" width, then in all likelihood you can use the curved blocks on the 8SE too. Here are top & cross-section views of the curved block installed on my C8:
No drilling of hole/s necessary on the OTA as shown in the last image - the center screw does not go all the way to the OTA but only up to the curved block which is attached to the OTA by the two screws with a 1.75" spacing between them. Hope this helps.
Best,
--------------------
Hernando
Nexstar 8/CG-5 ASGT; WO Megrez 102ED SV; Antares 6" 1529; WO ZS66SD; Orion ST80
TV Naglers 5T6, 9T1, 12T2; Panoptic27; Hyperion 8-24mm Zoom,21mm; WO 7.5-22.5mm
BO/TMB 2.5/3.2/4/6mm;UO HD 5;BGO 6;Meade-RGO 7;UO-V 9/12.5;Brandon 16mm;Ultima18
TV 2x,3x barlow&8/11/15/20/32plossl; Aspheric31;Siebert36-OB;Paragon40;Meade56Smoothie
C-f/6.3FR;OIII,UHC,SkyGlow,U-block,8"S-flter;GLP/Telrad/MRF/9x50RACI; NexImge;Canon RebelXS
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brmillsy
member
Reged: 07/29/09
Posts: 42
Loc: Wheatfield, NY
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The picture attached is indeed exactly what the 8SE looks like. The distance between the two holes on the backside is 7/8" so I think the 1.75" curved block would be too big.
What do you think about those other pre-threaded holes on the dovetail itself? The ones shown in your photos with an aluminum or steel screws in each hole. I was thinking of using the orion 8" mounting plate and drilling holes in it to match up with the pre-threaded holes in the existing dovetail plate.
Do you know if the Orion mounting plate is 1 and 7/8" wide? That is the dimension on the existing SE plate. If so then I would think I could attach the orion mounting plate to the existing plate using the pre-drilled and pre-threaded holes.
What do you think?
Thanks.
Brian.
--------------------
Nexstar 8SE
Plossols: 4mm, 6mm, 9mm, 15mm, 25mm, 32mm
Naglers: 5mm, 7mm
Ethos: 13mm
UHC filter, Moon filter, Colored filters
Dewshield, Powertank, 2X Barlow,
F/6.3 focal reducer, JMI motorfocus
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ibase
Carpal Tunnel
Reged: 03/20/08
Posts: 1538
Loc: Manila, Philippines 121*E 14*N
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Yes I think you can use the Orion dovetail because I measured the pre-existing holes and it is indeed 7/8" apart while the bar itself is 1-3/4" at its widest. The 8" dovetail bar will be too short, use the longer bar. Here's a pic of the 13" bar spanning the length of the OTA:
Instead of curved blocks maybe you can just use washers on each of the 7/8" spaced bolts to raise the dovetail around 10mm which is the thickness of the curved blocks.
Best,
--------------------
Hernando
Nexstar 8/CG-5 ASGT; WO Megrez 102ED SV; Antares 6" 1529; WO ZS66SD; Orion ST80
TV Naglers 5T6, 9T1, 12T2; Panoptic27; Hyperion 8-24mm Zoom,21mm; WO 7.5-22.5mm
BO/TMB 2.5/3.2/4/6mm;UO HD 5;BGO 6;Meade-RGO 7;UO-V 9/12.5;Brandon 16mm;Ultima18
TV 2x,3x barlow&8/11/15/20/32plossl; Aspheric31;Siebert36-OB;Paragon40;Meade56Smoothie
C-f/6.3FR;OIII,UHC,SkyGlow,U-block,8"S-flter;GLP/Telrad/MRF/9x50RACI; NexImge;Canon RebelXS
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