Hi Rolando, Does the Quad TCC require the same back distance to focal plane in AP 155 f/7 as in 130 f/6.3 GTX/GT. Thanks, JT

Is the 155 equipped with new 3.5 focuser? Jiangtao

Yup, I belong to the lazy category, ;-) But it's good to know actually no app is needed!

Methods to Determine Position of Polaris on Reticle: Astro-Physics Polar Alignment Scope Utility - now a part of the AP V2 ASCOM driver iPhone/iPad/iPod Touch App - Click this link to the "Astro-Physi