Amateur Telescope Making (UPDATED 9/23/18) - 20" f/4 Nearly Complete

[_Augustus_]

OTA and base for the 20" was completed last week.

I also redesigned the UTA for the 16":

[LaydeeDem]

11 hours ago, _Augustus_ said:

OTA and base for the 20" was completed last week.

-snip-

I also redesigned the UTA for the 16":

-snip-

Holy crap that's a monster! I was thinking about building a dobsonian mount for my 4.5" Newt. Do you have any advice that could point me in the right direction?

[_Augustus_]

13 hours ago, Nutt007 said:

Holy crap that's a monster! I was thinking about building a dobsonian mount for my 4.5" Newt. Do you have any advice that could point me in the right direction?

https://stellafane.org/tm/dob/index.html

[LaydeeDem]

On 9/17/2018 at 2:28 PM, _Augustus_ said:

https://stellafane.org/tm/dob/index.html

Awesome. Thank you!

[YNM]

On 9/17/2018 at 2:40 AM, _Augustus_ said:

20"

Can you make some telescope for our research observatory ? 

(JK, but yeah you seem to have flown to the Moon or something ! and yeah we don't have many telescopes here and probably will find a 'cheap' one for new observatories)

[_Augustus_]

Finished the 20", just needs a mirror cell.

[_Augustus_]

Mirror is in the cell.

[_Augustus_]

Tested the 20" out tonight. Everything works great with one exception - the truss poles are several inches too long. Will fix that soon.

[_Augustus_]

Silvering chemicals arrive later this week - the only nearby coater who takes mirrors this huge has moved and won't be in operation for a while, so I have no other choice.