dobsonianpower.bcns.ai/Concenter?Astro%20Art%20%F0%9F%87%AA%F0%9F%87%BA%20Collimation%20Tool%20-%20The%20Concenter& and a cheap laser similar to mine in US Amazon: www.amazon.com/gp/product/B00LX34ZH2/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=keepitsimp06b-20&creative=9325&linkCode=as2&creativeASIN=B00LX34ZH2&linkId=17af119824f37e690cced4d1badbb6d5
Use the laser with a Barlow lens. That diffuses the point to a broad scattered beam that's easier to align with the center mark on the primary. Then, instead of trying to get the dot back in the hole in the laser, you'll see a shadow of the center mark ring. Adjust your primary until the shadow of the center mark equally surrounds the return hole. It may sound confusing, but if you look up a video explaining it, you'll see it makes sense. It's perfect because it takes away the issue of the tiny laser dot not hitting the same place every time.
Yes, the barlowed laser it's a nice collimstion method. That would be 3 tools to collimate instead of 2 and not all the barlows seem to work with it.. But it is good too.
The barlow method means the laser does not have to perfectly collimated because the beam is diffused. If you rotate the laser in the barlow you will see diffused spot does not move.
I've used the barlow method in the past but i didn't like it. At the end what matter is that one choose/use what it fits better and like. This video purpose it's to expose the method i prefer and with excellent results. Doesn't mean that other methods aren't good but i prefer this one. :)
Great method, Thanks for sharing.. I'm like you I don't like laser collimator's they are so inaccurate. The method I use and have used for years is a cap and then a star-test, in my book that is all you need for good if not perfect collimation.
Uma coisa que terei que aprender a fazer, colimar o telescópio.... Não será possível colimar o telescópio usando apenas uma estrela? Tenho que investigar essa hipótese...
@@DobsonianPower you want the centre dot of the primary, as you are looking into the focuser, to be centred within the first innermost ring. Is my reasoning correct?
@@DobsonianPower You are making it sound waaaay tooo simple. It is NOTHNG of the sort. I also disagree with you about offset mirrors. You may centre your secondary. You may make sure it is a nice round circle but the moment you try to align the primary your centre spot will no longer be centred.
@@dankahraman354 Yes, yes! With the first ring and all the other rings that are concentric. That's why i like this. You can watch all at once and detect anything. It's hard to show with the camera because any shake or inclination will change the picture. And with the light it's hard to see in the picture that dot exactly in the center. You have a tiny circle, the smaller one, that surround that dot. It's a grateful image i see every time i place my telescope.
@@DobsonianPower I don't have an issue with your video. You did a good job capturing the view. My issue is that in an offset secondary the centre dot will be right in the middle of the first ring BUT the secondary mirror will NOT be concentric even though it should be very round. Finally the 3 mirror clips should be concentric with the ring of the tool while the centre dot remains centred within the innermost )smallest) ring. Arriving at it is VERT difficult!
Was wondering, is it normal that on my eyepiece on my dobsonian, there is a small circle right in the center of the eyepiece? Seems to be the secondary reflecting on my eyepiece?
@@DobsonianPower Thank you, I will try to fix it! It's kinda annoying me, as to what's causing it. Even when the top is covered by the big plastic dust cover. With no light or dust coming in the tube. You can see a circle dot on the middle of the eyepiece.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Can you put a link for the concenter
dobsonianpower.bcns.ai/Concenter?Astro%20Art%20%F0%9F%87%AA%F0%9F%87%BA%20Collimation%20Tool%20-%20The%20Concenter& and a cheap laser similar to mine in US Amazon: www.amazon.com/gp/product/B00LX34ZH2/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=keepitsimp06b-20&creative=9325&linkCode=as2&creativeASIN=B00LX34ZH2&linkId=17af119824f37e690cced4d1badbb6d5
@@DobsonianPower thank you
Use the laser with a Barlow lens. That diffuses the point to a broad scattered beam that's easier to align with the center mark on the primary. Then, instead of trying to get the dot back in the hole in the laser, you'll see a shadow of the center mark ring. Adjust your primary until the shadow of the center mark equally surrounds the return hole. It may sound confusing, but if you look up a video explaining it, you'll see it makes sense. It's perfect because it takes away the issue of the tiny laser dot not hitting the same place every time.
Yes, the barlowed laser it's a nice collimstion method. That would be 3 tools to collimate instead of 2 and not all the barlows seem to work with it.. But it is good too.
That's so true and it's so important to know. Collimation needs all the components to be perfect.
The barlow method means the laser does not have to perfectly collimated because the beam is diffused. If you rotate the laser in the barlow you will see diffused spot does not move.
I've used the barlow method in the past but i didn't like it. At the end what matter is that one choose/use what it fits better and like. This video purpose it's to expose the method i prefer and with excellent results. Doesn't mean that other methods aren't good but i prefer this one. :)
Great method, Thanks for sharing.. I'm like you I don't like laser collimator's they are so inaccurate. The method I use and have used for years is a cap and then a star-test, in my book that is all you need for good if not perfect collimation.
And that's it!
I put a tape in the laser 2" adapter to remove woble. Relatively easy fix. I don't know why manufacturers sells the adapter with such a lose fit.
Uma coisa que terei que aprender a fazer, colimar o telescópio.... Não será possível colimar o telescópio usando apenas uma estrela? Tenho que investigar essa hipótese...
Only rock stars collimate with sun glasses 😂
@danielbarbieri8199 oh that was only for the video 😎
OK the camera is beautiful but what about an offset secondary?
with the concenter you can place the secondary in the right position
@@DobsonianPower you want the centre dot of the primary, as you are looking into the focuser, to be centred within the first innermost ring. Is my reasoning correct?
@@DobsonianPower You are making it sound waaaay tooo simple. It is NOTHNG of the sort. I also disagree with you about offset mirrors. You may centre your secondary. You may make sure it is a nice round circle but the moment you try to align the primary your centre spot will no longer be centred.
@@dankahraman354 Yes, yes! With the first ring and all the other rings that are concentric. That's why i like this. You can watch all at once and detect anything. It's hard to show with the camera because any shake or inclination will change the picture. And with the light it's hard to see in the picture that dot exactly in the center. You have a tiny circle, the smaller one, that surround that dot. It's a grateful image i see every time i place my telescope.
@@DobsonianPower I don't have an issue with your video. You did a good job capturing the view. My issue is that in an offset secondary the centre dot will be right in the middle of the first ring BUT the secondary mirror will NOT be concentric even though it should be very round. Finally the 3 mirror clips should be concentric with the ring of the tool while the centre dot remains centred within the innermost )smallest) ring. Arriving at it is VERT difficult!
How about offset secondaries?
with the concenter you can place the secondary in the right position.
Thanks informative
you're welcome!
Was wondering, is it normal that on my eyepiece on my dobsonian, there is a small circle right in the center of the eyepiece? Seems to be the secondary reflecting on my eyepiece?
Yes, should be some kind of reflection/light intrusion. You may try starting to prptect from light,moon included, and see what happens.
@@DobsonianPower Thank you, I will try to fix it! It's kinda annoying me, as to what's causing it.
Even when the top is covered by the big plastic dust cover. With no light or dust coming in the tube.
You can see a circle dot on the middle of the eyepiece.
@@T.K.9 it could be the eyepiece. What eyepiece is it?
@@DobsonianPower StellaLyra 30mm 2" 68º Superview eyepiece with 22mm eye-relief
I don't know that one but could be that. Does it happen always? Even without moon and watching anywhere in the sky?