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Hi Gaetano Bruno, please check my website astrokhan.wordpress.com/ where I have documented how I made this telescope. If you go down on the landing page, you will see several pages listed for the individual items including one for the focuser. Here is the link for the focuser page astrokhan.wordpress.com/home-2/assembling/diy-focuser/. It was made using a plumbing part called "Tank Connector" in India. Not sure if it is available in your country. You may however find a similar something in your country.

@@jayantibhaichauhan56 good to know sir. Where are you located?

@@astrokhan Yes, I am in California USA. Your mirror Center is over corrected and had turned down edge very little , need little more correction, this is use full for manufacturing called parabolizing mirror with six variable to control, Pitch hardness, Tempeture, pressure on tool, Stroke and speed of the table, Quality of pitch tool(contact and mesh on tool), Your Own Mood if wopprking by hand. YOur light source can be improved. YOu are doing and explaining excellent Ronchi test. This is qualitative test and easy working.

@@jayantibhaichauhan56 thank you sir for your appreciation 🙏 I hope to complete this mirror soon. Kindly also have a look at my blog site astrokhan.com

and srry if my english looks back because im learning xd

Ryan, Thank you. Please check the videos of the Moon, Jupiter and Saturn on my channel to understand the quality of this scope. I get good sharp views with this. For DSO, I suggest you get at least an 8 or 10 inch scope that is portable. You will never be satisfied with the size of any telescope and always want to buy bigger ones but please note that bigger telescopes are heavy and not much usable due to the size. The best telescope is the one you use as much and easily carry around. You may also like to check my blog astrokhan.wordpress.com to learn about telescope making. And your English is good.

Thank you!. The LED used if the one comes as bare LED strips. I later upgraded the tester to use a 10mm green one.

@@astrokhan do you have a manufacture and part number?

@@ralphblach2952 No idea about the part number or the manufacturer as these are commonly available in my country. You may like to see this page astrokhan.wordpress.com/home-2/testing/foucault-tester/

Thank you :)

@@binalvinod thank you!

@@satyajitbhadraroy7723 thank you!

Thank you buddy!

For TDE, reduce the polishing stroke length. Slight TUE is corrected during parabolizing.

@@astrokhan Thanks

6" F/8 Newtonion

Thank you and all the best!

Yes the camera is placed behind the blade or knife edge. Check my other videos of how the setup was done.

Thank you Mushtaq bhai

How much price for this machine now

For this, I used normal white cement.

@@astrokhan I have made 12 inch tool , using glass pieces of 1.5 square inch. but for polishing i didn't get pitch resin , instead i will use bitumen tool, any suggestion for bitumen tool making.

@@MrBhujbalgv bitumen will work however it may be softer than the desired pitch hardness. Anyway please try as many have used it successfully. Just make sure to get a clean piece for melting as any impurity will scratch the mirror.

It would be too big for the same size primary mirror. Use a small secondary as much possible.

Sorry 8in mirror

@@artsandpapermodel8393 ok. Yes, you can use 40mm secondary for an 8 inch mirror if you have a low height focuser.

Thanks

Yes, white cement works as well. Just cure it completely before use. See my other video of 12 inch tool making with white cement

Thanks 🙏

You can get teflon sheet from industrial supply hardware stores. In case you don't have that in your city, then try using plumbing teflon tape. You can wrap a few layers of it on a plastic piece of desired thickness. It will work well

Thanks ❤

Vanguard didn't list the objective focal length in their specs. However based on the objective size of 82mm and scope size, it may have a FL of 300 mm. Based on this assumption, you will get approx 43x magnification with this eyepiece (300/7).

It also has 1.25 inch diameter so it should fit in Vanguard. However I looked at the specs and see that Vanguard has a Bayonet type mount for eyepiece so I am not sure how you would be able to secure this eyepiece (Pentax) with the Vanguard eyepiece mount

@@astrokhan I checked that bayonet mount bhas screws so they can be removed and and 1.25 tube can be fitted there just need to do some extra work like around where eyepiece fits there are threads so step up ring will help to secure eyepiece.

@@trident8872 that's good to know. All the best! 👍

Thank you Suverna

Thanks! I have not experimented with a disk filter with reverse direction of the flow. But why not, it may also work that way.

Basically all four will work and may just require less or more heat treatment for correct hardness.

@@astrokhan thanks

171X magnification with my 1200mm reflector telescope.

Applied knowledge, ग्राइंडिंग टूल को convex बनाते हैं ग्राइंडिंग टाइम कम करने के लिए. फ्लैट टूल भी convex ho jayega mirror on top (MoT) ग्राइंडिंग करने से. Telescope banana seekhne ke liye ye book download kar ke padho. www.edmundoptics.com/ViewDocument/All%20About%20Telescopes%202.pdf

Thank you Aasif Kamaal

Raja ji, I am working on 8 inch mirror but not getting enough time. Hope to complete it soon

Thank you Gaurav Bhai 😊

Thank you!

I will post the complete details on my blag

Yes😢

Thank you!

Thank you!

Thank you! Yes will add a small finderscope later😊

Hi Omkar, main bana to sakta hoon par usme bahut time jayega aur abhi main bahut busy hoon

Please add more rosin. You can also boil it for long to evaporate turpentine in it. Adding rosin or boiling It depends on how soft you pitch already is. You need to experiment it. So add only small quantities at a time

Hpktech Please check this video th-cam.com/video/CvoZnW2I4tk/w-d-xo.html.

I didn't do myself. It was sent to a professional coater for aluminizing