I ordered the kit for my 8” ONTC… one question- how do you know which bolt to adjust ? Perhaps a video showing the association of the mask and the open portion of the blocking cover and how that relates to a particular collimation bolt. Looking forward to using it !
Of course, we can create a video or photo with an explanation 😊. But to explain in words: the mask has three distinct sections, each spaced 120 degrees apart. Each section is marked on the mask to indicate its direction. To align the mask with the bolts, simply position the mask (along with the compression ring) so that one of the three marks points toward one of the collimation bolts.
A "normal" Bahtinov mask is used to get good focus. The effect of out of focus, is that the intersection of the three lines is not in a single spot. While collimating your main mirror, you also try to get the intersection of the three lines in the same spot. (times 3: one for each knob). So how do you discriminate between out of collimation and just out of focus?
You run autofocus prior to collimation and estimate best focus via FWHM. Thats how you know that asymmetrical axes are due to miscollimation. In my experience this method works well.
I am thinking of ordering your nice kit for my ontc8 A bit silly question regarding the aperture mask, does it do the similar work like the mask that I’ve already 3d printed and placed on the primary mirror that helps avoiding the clipping issue on the stars? Or I’ll have to keep that one?
@@miketronix it has similar purpose. The difference is that mask on primary hides clips, while aperture mask hides obstacles or reflective surface on the inside of the tube (e.g. nuts used to attach guide scope shoe to the top of the tube)
I think so, with appropriate central hole for mirror adjustment 😊 if you would be willing to try it on your RASA, drop us an email to info@deepskydad.com
I ordered the kit for my 8” ONTC… one question- how do you know which bolt to adjust ? Perhaps a video showing the association of the mask and the open portion of the blocking cover and how that relates to a particular collimation bolt.
Looking forward to using it !
Of course, we can create a video or photo with an explanation 😊. But to explain in words: the mask has three distinct sections, each spaced 120 degrees apart. Each section is marked on the mask to indicate its direction. To align the mask with the bolts, simply position the mask (along with the compression ring) so that one of the three marks points toward one of the collimation bolts.
Amazing !
Do you have any more info about the encoders on the eq6r you talked about?
@@AaronDalton1 will release separate video, we are currently preparing new controller circut box :)
A "normal" Bahtinov mask is used to get good focus. The effect of out of focus, is that the intersection of the three lines is not in a single spot.
While collimating your main mirror, you also try to get the intersection of the three lines in the same spot. (times 3: one for each knob).
So how do you discriminate between out of collimation and just out of focus?
You run autofocus prior to collimation and estimate best focus via FWHM. Thats how you know that asymmetrical axes are due to miscollimation. In my experience this method works well.
@@pavlini0 Thank you for your answer!
I am thinking of ordering your nice kit for my ontc8
A bit silly question regarding the aperture mask, does it do the similar work like the mask that I’ve already 3d printed and placed on the primary mirror that helps avoiding the clipping issue on the stars? Or I’ll have to keep that one?
@@miketronix it has similar purpose. The difference is that mask on primary hides clips, while aperture mask hides obstacles or reflective surface on the inside of the tube (e.g. nuts used to attach guide scope shoe to the top of the tube)
Can you use this method on a 8" RASA?
I think so, with appropriate central hole for mirror adjustment 😊 if you would be willing to try it on your RASA, drop us an email to info@deepskydad.com
If that is the "easy way"....... I will stick with my laser and flashlight
@@n5sdm if it works for you, by all means 😄