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over the hill prom with edmund 2 inch scope
- marktownley
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Re: over the hill prom with edmund 2 inch scope
That works really well John! Tell us more about the scope you made?

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- DeepSolar64
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Re: over the hill prom with edmund 2 inch scope
Nice!! You had far better luck than I did today. 

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Re: over the hill prom with edmund 2 inch scope
mount rail and laser pointer mount rail added later in time
used combo qrk chromo for Ha
at F25 works real nice
used combo qrk chromo for Ha
at F25 works real nice
- MapleRidge
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Re: over the hill prom with edmund 2 inch scope
Nice catch of the fila-prom!!!
Brian
Brian
Brian Colville
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Maple Ridge Observatory
Cambray, ON Canada
Photos: https://www.flickr.com/photos/185395281@N08/albums
10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
C9.25 Edge + Stellarvue 110, f7 or C14
Deep Sky Work - Canon 60D (Ha mod), SBIG STF8300/FW8, ONAG
Planetary Work - SBIG CFW10, ASI290MM/ASI462+ADC
8' Diameter Dome
MI250 Mount carrying:
iStar 150mm, f8 OTA Modular Setup
Ha configuration: 2xDSII/B1800Ha/Daystar ERF as modded Ha Scope
WL & CaK configuration: Lunt WL Wedge or Modded B1800CaK Wedge
Lunt LS80PT/LS75FHa/B1200Ha
Daystar Quantum 0.45A SE, Quark Combo Chromosphere,
ASI1600MM, ASI174MM, ASI290MM, PGR Grasshopper Express
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Re: over the hill prom with edmund 2 inch scope
im a crazy puppy
still have log of first use of this scope sept 4 1973
still have log of first use of this scope sept 4 1973
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Re: over the hill prom with edmund 2 inch scope
Well John, a comment made recently on another post, said about "size doesn't matter" and your scope and the image shown here - really proves that. Almost difficult to believe that a 2" scope can achieve such a good image, but you have proved that too...
Thanks vm for sharing and congrats on the result.
Terry
Thanks vm for sharing and congrats on the result.
Terry
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Re: over the hill prom with edmund 2 inch scope
John,
At F25 this scope should be as free of color as many modern apochromats. I am guessing that the focuser is 1.25". Back in the early 1970s many small refractors came with .965 focusers.
I started with a 50mm focal refractor back in 1978. Both it and my 1982 model 60mm Traq refractor both have .965 focusers. I still have my early logbooks I did using the 50mm as well. It's an F11.8.
James
At F25 this scope should be as free of color as many modern apochromats. I am guessing that the focuser is 1.25". Back in the early 1970s many small refractors came with .965 focusers.
I started with a 50mm focal refractor back in 1978. Both it and my 1982 model 60mm Traq refractor both have .965 focusers. I still have my early logbooks I did using the 50mm as well. It's an F11.8.
James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
ZWO ASI178MM monochrome camera
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
" Way more fun to see it! "
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
ZWO ASI178MM monochrome camera
Lunt, Coronado, TeleVue, Orion and Meade eyepieces

" Way more fun to see it! "
- marktownley
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Re: over the hill prom with edmund 2 inch scope
That's a cool scope John!

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Re: over the hill prom with edmund 2 inch scope
Fine scope and image. I know that book (All about telescopes) full of interesting projects. At that time I was using a 60 mm refractor.
Raf
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Re: over the hill prom with edmund 2 inch scope
yes no color error detected at f25
since body was home build i chose 1.25
there is a CA chart that plots CA based on
F vs Diameter it only goes up to F20!
anything > 5 is considered good
this scope is 12.5
nothing on chart is that high
since body was home build i chose 1.25
there is a CA chart that plots CA based on
F vs Diameter it only goes up to F20!
anything > 5 is considered good
this scope is 12.5
nothing on chart is that high
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Re: over the hill prom with edmund 2 inch scope
That's a super filaprom and the sketch from 1973 made me smile
well done!
Alexandra


Alexandra