The Universe of 1962

Laurel found a Sears 6307B 60mm F=700 (f/11.67) from 1962 on the street. I brought it home and I bought 0.965 inch eyepieces for it from The Surplus Shed. 

 

On 2 August, I viewed the gibbous Moon to align the finder scope (with crosshairs) and to check the eyepieces. I bought a standard set: 6 mm, 12.5 mm, and 20 mm. The telescope came with those, as do many such even today, though more often, just two, 10mm and 20mm. These were Huygens eyepieces, a two-lens design from the 17^th century. I also bought a 16 mm “wide view” Kellner, a three-lens 19^th century improvement. I was cautioned by a friend online at Cloudy Nights that these replacements being plastic were not as good as the original equipment. That was easy to accept. The original 6mm eyepiece was with the scope and it is made of metal and (apparently) glass. However, it had a problem with corrosion or something that would not come off with Zeiss lens cleaner. 

The next night, I split the double star beta Scorpii (Graffias) with the Kellner at 43X. The view was not wide enough to take in all of Messier 7 the Ptolemy Cluster but I was satisfied. I could not locate Messier 80 or M22 which was disappointing. I believe that the optics would do it, but fussing and fiddling with the over-engineered and under-built mount was frustrating. 

I will nod to the engineering, however. Unlike a modern telescope, you focus this well enough with the eyepiece draw tube and then finely tune the focus with the controls. Similarly, the altiude and azimuth are found roughly close and then, with those bolts tight, you adjust the alt-az settings with knobs on the fine tuning engagement. With more practice, I could learn to do it.

 

The next morning I viewed Jupiter’s bands, its polar band – a pleasant surprise; why we call long focal length refractors “planet killers” – and noted that three of its moons were visible. 

I then turned to Messier 42, the Orion Nebula, found it easily, and (another surprise) the Trapezium was clear and bright and sharp.

 

Happy with the experience, I put the telescope away very carefully. My current instruments are much better, of course, but if I had to live with only this, I could. And just to note, I do have two Celestron Huygens oculars with standard 1-¼ inch barrels. Putting them into a 70mm refractor, I kidded online at CN that I was viewing the universe as it looked in 1650. It looked OK.  Better instrumentation is better, of course, but double stars, open clusters, a bright globular were all truly visible and enjoyable.

 

 

PREVIOUSLY ON NECESSARY FACTS

The Andromeda Galaxy 

Xi Scorpii

An Online Class in Astrophysics

Viewing Mars