Mike
Diagonal on finder scope
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Diagonal on finder scope
Mike
Celestron 15x70 binos
Skywatcher Startravel 102 (AZ) SynScan GOTO refractor
Skywatcher Skyliner 200P Dobsonian
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Re: Diagonal on finder scope
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Re: Diagonal on finder scope
You can get around this by sawing off a portion of the tube to account for the length of the light path in the diagonal, but then you have to re-thread the tube or determine other means to attach the diagonal.
It can be done by the intrepid amongst us, or by those with the proper tools and skillset. Most of us find it an easier undertaking to simply purchase a Right Angle Correct Image (
This one ought to do nicely: https://www.firstlightoptics.com/finder ... scope.html
Scopes: Apertura AD12 f/5; Celestron C6-R f/8; ES AR127 f/6.4; Stellarvue SV102T f/7; iOptron MC90 f/13.3; Orion ST80A f/5; ES ED80 f/6; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen Polaris
Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett Gemini 12×60 LW, Gordon 10×50, Apogee 20×100
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Re: Diagonal on finder scope
SCOPE : Skywatcher 120X600 ST Achromatic Refractor.
EP's : 25mm & 10mm Plossl , Celestron 8/24mm Zoom EP,
Filters : Solar filter, Badder Fringe Killer & Moon/Skyglow.
MOUNT : Skywatcher Star Discovery goto Mount.
CAMERAS : ZWO 120 asi MC. / Sony HX400V 50X Zoom.
Binoculars : Saxon 10x50
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Re: Diagonal on finder scope
Man... That's some icky-tasting stuff!
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AT50, AT72EDII, ST80, ST102; Scopetech Zero, AZ-GTi, AZ Pronto; Innorel RT90C, Oberwerk 5000; Orion Giantview 15x70s, Vortex 8x42s, Navy surplus 7x50s, Nikon 10x50s
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Re: Diagonal on finder scope
It is intended as a rifle scope. I purchased a rail at a sporting goods store, fitted it to the scope, then put the laser on that.
Usually you can use either a switch on the back of the laser, or a switch at the end of a coiled wire, allowing you to put the switch anywhere you like.
Then when you turn the laser on, you can quickly center a bright star in your finder. Then use your
NO BENDING OVER!!! At least for my 12.5"
Scopes: Criterion RV-6; 8" f/8 homebuilt; 10" Cave OTA; 12.5" Dobsonian; Celestron C11 Mounts: Losmandy G11 Eyepieces: ES 82° 24, 18, 14, 11, 8.8, 6.7, 4.7; Meade RG: Erfle 20; Ortho 16.8, 10.5, 7 Binoculars: Orion Ultraview 10x50; Filters: DGM NPB, O-III; Orion SkyGlow; DSLR: Canon t6i
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Re: Diagonal on finder scope
It can be done for sure, though most would just find another solution. Still, I had a few diagonals from .965" fittings, and a few straight-through finderscopes. With a bit of creativity, I now have 3
Granted, they are all only 6X30, but for me they work just fine.
This is the basics of it. You will have to saw off part of the finderscope after first finding out the length it needs to be. I take it apart, put the objective on a ruler with the diagonal, use the front part of the finderscope (the piece with the crosshairs) and adjust the objective and diagonal until I get focus. I take the measurement between the two and cut to that. When cutting the finderscope, I recommend you adjust the objective at the front so that it is in the middle; ie the threaded part. This way you have forwards and back travel to make the final adjustments.
You might need some shims to make it all fit. Any plastic container will do; you just have to find one with the right thickness. I have yet to glue any of them together; they all have a tight fit, plus I can swivel the diagonal for comfort. In three years, not one of them has ever fallen apart
For cutting the focuser, I highly recommend using a metal hacksaw with a fine blade (aluminum) and a hose clamp to keep thing straight while cutting. That might have to be turned once or twice during cutting.
Pictures are worth a billion of my words
Hope this helps; though again, most people would find another solution. I'm just too much into home-made...
Best of luck and all the best,
"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
Solar:
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
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