Collimation of a Alluna Ritchey Chrétien telescope 
 
 

In the following we show you how you Alluna Ritchey Chrétien telescope in a few steps and within
a few minutes to adjust perfectly. The collimation is performed best in daylight. 
 
 
 

	Step 1 You need a Takahashi Collimations Scope and for the connection to the telescope the adapter for M100x1. The Takahashi Colli Scope and the adapter that fits all of our RC telescopes to get with us as an accessory.
	Step 2 Connect the Colli Scope with the adapter M100x1
	Step 3 Then screw the adapter with the Colli Scope on Alluna RC-Telescope set the output. It is advantageous, with the existing extension tubes to extend the output.
	Step 4 The Takahasi Colli Scope is now firmly attached to the telescope. The optical axis agrees with the later use of CCD camera, eyepiece, or other supplies exactly with the! Nothing can shake everything is tight! Now the opening of the telescope on a bright wall or white paper are target.
	Step 5 Looking through the Collimations Scope you see in a not adjusted system accompanying picture. This system we have for the extra explanation misadjusted strong. The goal now is to get visible concentric rings all. The Colli Scope can something be moved back and forth. So you can focus accurately.
	Step 6 If an adjustment should be necessary, first open the lock screws then can the adjustment screw for setting to be moved. There are three adjusting screws and three locking screws for the main mirror and the secondary.
	Step 7 First, the secondary mirror is adjusted. These screws are the three counter secondary mirror holder open on. By turning the adjustment screw-on secondary mirror holder moves the smallest inside white circle, which is the marker that are on the secondary. This is must be exactly centered on the second inside white circle are placed. Are the two white rings inside each other in the middle, secondary is the adjusted finished. Do not forget the lock screw on secondary mirror holder pick up again.
	Step 8 The next step is the adjustment of the primary mirror. First, the three locking screws on the backplate will be slightly open. Now, the wide black circle in the somewhat thinner outer black circle. Please compare the picture with an accompanying picture above. When very thin white ring uniformly to see is a circle between the two, is also the primary mirror and thus adjusts the whole RC-System ready. Please do not forget the counter-tighten the screws primary mirror again, again adjusting uncontrollable.

I hope it helped you and we could show you how easy adjustment of a Alluna Ritchey Chretien Telescope is. 

Alluna Ritchey Chrétien Telescopes
 

Note: We are aware of questions that this manual for the adjustment of Cassegrain or RC system does not use Alluna telescopes. Often the results will not meet expectations.

Please note that our RC-Telescopes are manufactured with high precision!
That means at Alluna RC-Systems are the primary mirror, secondary mirror, the baffle and the spider to each other exactly and precisely centered in the middle of OTA system. With exactly do we mean to each other deviations of perhaps one or two tenths of a millimeter of all components throughout the system.

In other Cassegrain and RC systems often agree, these axes do not match, are wrong move or change of load.
Few millimeters and more are not uncommon. An adjustment to the visible rings with the Tak-Collimations-scope leads to these telescopes rarely a success. Such telescopes, you should costly adjust on the star as possible or at the zenith of the main direction of observation.