View Full Version here: : Kasai Pentaprism diagonal

28-05-2012, 07:42 PM
Hi - wondering if anyone has had any experience with this pentaprism diagonal from Kasai Trading: Kasai Pentaprism (http://www.kasai-trading.jp/kasaidxpentaprism317.htm)

Here's a "better" explanation/translation: Widescreen - Kasai diagonal (http://www.best-telescopes.com/Products/KASAI_1_25_Dielectric_Coated_.html)

It is stated to have 97% reflectivity which seems rather good for such an arrangement, and with all the benefits of a correct view. However, it only seems to come in 1.25" and has a longish light path (around a 2" mirror diagonal, but that's ok), and is not cheap! Sounds interesting, though.