9.201995 Sighting Telescope REL 22C Mk. II 1941

On 26 Mar, 2020 By rosenfel@chass....
  1. catalogue number: 9.201995;
  2. name of artifact: Sighting Telescope REL 22C Mk. II 1941;
  3. date of production: 1941;
  4. materials of manufacture: optical glass, lacquered copper-alloy, & steel(?);
  5. maker: Research Enterprises Limited (REL), Leaside ON;
  6. provenance: gift of the DTM founder;
  7. condition: complete, and with its original case. Optics excellent, and eyepiece retains its reticle;
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8.201987 Brashear "Bracebridge" 4.5-inch refractor

On 25 Mar, 2020 By rosenfel@chass....
  1. catalogue number: 8.201987;
  2. name of artifact: “Brashear “Bracebridge” 4.5-inch refractor”;
  3. date of production: post 1905, probably ca. 1907-1908 (according to Bart Fried, email to R.A.R. 2019 June 19);
  4. materials of manufacture: optical glass, copper-alloy OTA, copper-alloy and cast-iron crescent-style equatorial mount with slow-motion arm, and hard-wood tripod;
  5. maker: signed “JOHN A. BRASHEAR CO. LTD./ALLEGHENY, PA., U.S.A.” (on the mount);
  6. provenance:
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7.201987 Fullum 10-inch Dobsonian telescope

On 25 Mar, 2020 By rosenfel@chass....
  1. catalogue number: 7.201987;
  2. name of artifact: “Fullum 10-inch Dobsonian telescope”;
  3. date of production: ca. 2010 November 1;
  4. materials of manufacture: optical glass, modern coatings, variety of lacquered hardwoods, Teflon & Ebony Star laminate/Formica -42 “Crystal”(?) alt-az bearings, steel and copper alloys, flocking(?), Velcro, 1x red-dot finder, two-speed focuser, primary mirror fan, plastic hardware;
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6.2019724 Batek-Jaegers Telescope

On 23 Mar, 2020 By rosenfel@chass....
  1. catalogue number: 6.2019724;
  2. name of artifact: “Batek-Jaegers Telescope”;
  3. date of production: ca. 1960-1967(?);
  4. materials of manufacture: 6-inch O.G. f/10 achromatic Jaegers doublet, with 3-inch f/5(?) Jaegers guide scope, one Jaegers’ finder scope, and one anonymous finder scope (copper-alloy, probably early 20th century), thirteen (13) eyepieces, filters in leather filter case, two Barlow lenses, equatorial mount and RA drive, pier, & plywood box for the aluminum tubes;
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Oso Observatory

On 23 Mar, 2020 By walter.macdonal...

(1979–2016) Leo Enright's observatory at Sharbot Lake, Ontario.

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5.2019516 ELCAN 7x50 roof-prism binocular

On 23 Mar, 2020 By rosenfel@chass....
  1. catalogue number: 5.2019516;
  2. name of artifact: “ELCAN (Ernst Leitz Canada) 7x50 roof-prism binocular”;
  3. date of production: 1974-1977;
  4. materials of manufacture: optical glass, coatings?, black anodized housing, with original Canadian Armed Forces’ issued green cloth case, and filters in the CAF issued green leather case;
  5. maker: Ernst Leitz Canada, Midland ON;
  6. provenance: purchased on eBay by the museum Director, from a vendor in Ottawa ON;
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4.2019518 REL 7x50 Porro prism binocular

On 21 Mar, 2020 By rosenfel@chass....
  1. catalogue number: 4.2019518;
  2. name of artifact: “REL (Research Enterprises Limited) 7x50 Porro prism binocular”;
  3. date of production: 1945;
  4. materials of manufacture: optical glass, black-enamelled metal, pebble leather covering;
  5. maker: Research Enterprises Limited (REL), Leaside ON;
  6. provenance: purchased on eBay by the museum Director, from a vendor in England;
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JRASC April 2020

On 10 Mar, 2020 By james@jamesedgar.ca

Inside this issue:

  • Cepheid Variables in Andromeda
  • Supernova Redshifts
  • 2019 Awards

This is a biggie, with 64 pages, lots of interesting articles by the regular columnists, glorious astroimages, and two meaty research papers.
And, what about that gorgeous cover image by Peter and Debra Ceravolo?

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3.2019416 Ball Spherometer

On 10 Mar, 2020 By rosenfel@chass....
  1. catalogue number: 3.2019416;
  2. name of artifact: ball spherometer, 6-cm diameter X 6.2-cm height, three legs;
  3. date of production: ca. 1900-1950;
  4. materials of manufacture: brass, with some nickel plating(?), and black enamel(?) paint;
  5. maker: manufacturer “NO”, England or continental Europe?
  6. provenance: i) purchased on eBay by the museum Director, from a vendor in England;
  7. condition: restored by museum director;
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2.2019326 Vixen “Replica of Isaac Newton's original reflector telescope”

On 09 Mar, 2020 By rosenfel@chass....
  1. catalogue number: 2.2019326;
  2. name of artifact: “Replica of Isaac Newton's original reflector telescope” (wording of the manufacturer);
  3. date of production: ca. 2018/2019?;
  4. materials of manufacture: optical glass, modern coatings, blackened metal, some plastic, with a faux-wood finish on part of the OTA, copper-alloy name plate on the top of the base, two eyepieces (“Plössl” design?);
  5. maker: Vixen Optics, Saitama, Japan;
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