Randy_Torres

On 28/08/2011 at 02:33, talteleoptics said:

 

John,

I completely understand the desire to have an idea on what will and may not work with that scope from aftermarket accessories prospective. My take on why this scope is more sensitive to non Tal eyepieces and diagonals is that optical design has a 3rd group of lenses at very end of the OTA tube where white body ends and Black Focuser housing begins. That means that drawtube can not travel deeper into the OTA as it done on extended travel focusers TAL100RS, TAL200K and typical TRIPLET APOs. They don't have lenses there. Therefore TAL125-5APO drawtube has max Length of the black focuser part. Moved all the way in, it bottoms out at the lens cell (where white body meets black focuser housing). That makes design more restrictive for over and under focus conditions that other telescopes don't have, allowing for more aftermarket accessories to work properly. Undestandably TAL made sure their accessories work with it as it was designed. Since I worked with TAL for some time, (not worked for TAL to be clear) my guess is that they will not be testing aftermarket sets to provide compatibility charts. May be Andy is our only hope?

Regards

Roman

Is Talteleoptics still in business?