WebPlease Note: A finderscope, diagonal and eyepiece are not included in the OTA package and must be purchased separately if desired. The iOptron® Photron™ Ritchey-Chrétien design telescopes feature low thermal expansion quartz primary and secondary mirrors with ninety-nine percent reflective dielectric coatings. The RC o WebThe Photron 250 RC OTA by iOptron is a 250 mm (10-inch) Ritchey Chretien astrograph telescope OTA designed for today's astroimager for a complete imaging and visual system. Introducing Photron, Ritchey …
iOptron Photron RC6 OTA AstroArt-Store
WebBuy iOptron Photron 150mm f/9 Ritchey-Chrétien Catadioptric Telescope (OTA Only) featuring 150mm Ritchey-Chrétien Catadioptric OTA, 1370mm Focal Length, f/9 Focal … WebThe iOptron® Photron™ Ritchey-Chrétien design telescopes feature low thermal expansion quartz primary and secondary mirrors with ninety-nine percent reflect. ... Photron™ 150 6 inch Ritchey-Chrétien Telescope (RC6) ... #6111 6" RC OTA only. OTA w/2" dual speed Crayford focuser; 2X25mm, 1X 50mm focus extention; biography of st. therese lisieux
26 best astrophotography telescopes 2024 BBC Sky at Night …
WebThe iOptron Photron RC6 is a Ritchey-Chrétien astrograph with a 150mm primary mirror and a 1370mm focal length. ... The long focal length of iOptron RC telescopes is beneficial for imaging galaxies and planetary nebulae. Both mirrors are 99% reflective and are aluminized and quartz coated. WebThey look sexy - a cheap price tag for the aperture, light-weight for the focal length, cool rainbow-colored star spikes, awesome resolution, and not too terribly slow optics at f/8 (can also be reduced for speed). What's not to like? Shoot, iOptron claims "coma free, chromatic aberration-free, spherical aberration-free optics". Sounds like a no-brainer for those … WebOur calculator, at typical seeing of 2-4”, uses the Nyquist formula of 1/2 and the 1/3 to stop stars becoming square so the optimal range is between 0.67” and 2”. (0.67 = 2 / 3, 2 = 4 / 2). In summary, we are using Nyquist as a starting point, with a slight tweak, because we are typically sampling very small, circular, stars. daily dental ann arbor