SW120ed Lens Fix
- Jones
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SW120ed Lens Fix
Triple lensed fracs are so yummy when looking at planets.
- Jones
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Re: SW120ed Lens Fix
The next day rotated the top lens another 90 degrees clockwise and the view that nite was even better.
The 3rd day rotated the lens only 45 degrees and the view was not better.
The 4the day rotated the lens 3/16 of a turn counterclockwise and the Jupiter view was much better.
The last day rotated the lens counterclockwise about 22 degrees for a total of 135 degrees from original placement and this produced the best views of all so far. Marked the lens with arrows pointed toward the sky along a line.
Triple lensed fracs are so yummy when looking at planets.
- Jones
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Re: SW120ed Lens Fix
My T.S. Optics 115mm-51 triple, recently built, beats all these 3 quite easily on Jupiter.
CAUTIONS
Put the tube assembly on your mount pointing straight up when attempting to screw or unscrew dew shield or lens assembly. These large diameter threads are very easy to cross thread. If you feel any resistance while attempting to thread on, STOP, and carefully unscrew part. You may feel or hear a click while unscrewing. These are the thread ends passing over each other and they may now be lined up. Start clockwise rotation to screw on, again being very careful. Parts just need to be snug.
My next trick will be stacking spacer rings to see if more lense separation will improve things.
Triple lensed fracs are so yummy when looking at planets.
- John Baars
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Re: SW120ed Lens Fix
I did something like this on an old achromat which was taken apart by the owner for cleaning purposes. There were no original optical markings.
A small part of one of the spacers was lost during his cleaning action; the lens showed quite a lot of
Of course his is not recommend for home and amateur-reparation of triplets. There are optical experts who make a living of it. Triplets are not really the cup of tea for us amateurs.
GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets).
Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5.
Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS, *Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40
Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt.
Amateur astronomer since 1970.
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