Extra Lightweight & Sturdy tube rings co-produced by RP-Astro (Italy) and Kasai. Hollow structure with hard aluminum alloy plates yields about 1/2 weight yet much more sturdy than normal metal tube rings. The box-shaped structure is especially strong against twists, far less bendings than normal one-plate metal tube rings. While reducing the total load to the mounting, more sturdy and stable holding is possible - ideal for astrophoto telescopes. Made-in-Italy stylish and minute finish is quite attractive. M6 x 3 reinforced female threads on top and bottom. Losmandy-compatible or Vixen-compatible dovetailed plate can be attached on either side. I.D. 303mm fits C11 and GSO 10" Newtonians. I.D. 358mm fits GSO 12" Newtonians and 12" Ritchey-Chretien. 1pc only is also available for the use of an accessory holder or else. Various sets as coming with Vixen-compatible dovetailed plate (L=335mm / M6 bolts x 2) and Losmandy-compatible dovetailed plate (L=357mm / M6 bolts x 4) are available, too.
I.D. 303mm Max.O.D. 370mm Width 40mm Weight 470g Threads M6 (27.5mm distance x 3 / top & bottom)	I.D. 358mm Max.O.D. 432mm Width 40mm Weight 525g Threads M6 (27.5mm distance x 3 / top & bottom)
Item Code 1pc 2pcs Pair 2pcs Pair + V-type Dovetail Plate 2pcs pair + V-type Dovetail Plate x 2 2pcs Pair + L-type Dovetail Plate 2pcs Pair + L-type Dovetail Plate x 2 ELS Tube Rings Ø303mm JPY25,000 JPY35,800 JPY40,500 JPY45,500 JPY41,500 JPY47,000 ELS Tubr Rings Ø358mm JPY26,500 JPY38,800 JPY43,500 JPY48,500 JPY44,500 JPY50,000
*V-type Dovetail Plate = Vixen-Compatible Width / L=335mm / M6 Fastening Bolt x 2 included *L-type Dovetail Plate = Losmandy-Compatible Width / L=357mm / M6 Fastening Bolt x 4 included

Kasai Trading Co., Ltd. 1-3-16, Naka-Cho, Meguro-Ku, Tokyo 153-0065, JAPAN TOP PAGE　　HOW TO ORDER