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#401 JM La Galette

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Posted 07 September 2013 - 02:45 PM

So many incredible scopes here...

Frederick, nice 17" dob really...

Jean-Marc

#402 bertb

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Posted 08 September 2013 - 02:24 PM

Do you have a link towards more information about Jeff B baffle sollution?

#403 plyscope

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Posted 08 September 2013 - 04:28 PM

JeffB had the good idea of allowing air (tube currents) to pass the outer edges of the baffles so as to avoid the possibilty of different air densities in the scope tube affecting the image at higher powers. It is simply a matter of allowing clearance between the outer baffle edge and the inside of the tube wall.

Here is a link to JeffB's latest telescope.

web page

#404 CSATelescope

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Posted 09 September 2013 - 01:54 AM

Hello,

Here is my 12 inch Single Arm Dobsonian Travelscope Project - CSAT
:)

Visit the following link for details:

CSA-Telescopes

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#405 C3P0

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Posted 09 September 2013 - 02:52 PM

That is a pretty looking scope!

Here's my 16" Dob

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#406 Martin Lyons

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Posted 11 September 2013 - 02:31 PM


Here's my 16" Dob


Hey Scott, is that pic taken at Scopex? (Sorry if the question sounds weird, but you don't have any details of your location)

Martin

#407 Mike Phillips

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Posted 19 September 2013 - 03:41 PM

How have I not found this thread yet?

Posted Image

#408 474747

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Posted 19 September 2013 - 06:56 PM

very cool scope

#409 neo

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Posted 20 September 2013 - 01:42 AM

Wooo I like a BIG newt on a GEM. It somehow reminds me about monster trucks :grin:

#410 Hemmi

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Posted 29 September 2013 - 05:09 PM

Here is my first homemade scope, its a 10" f5. I designed it loosely around the Dobstuff scopes. I went with a smaller ALT bearing, as this is getting servocat treatment. I will be using the servocat system designed for the Meade Lightbridge. All parts designed in CAD and cut on a CNC.

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#411 Symui

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Posted 30 September 2013 - 01:46 PM

Congrats - nice job!

What CNC router did you use? What type of plywood?

#412 Mike Phillips

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Posted 30 September 2013 - 01:55 PM

Here is my first homemade scope, its a 10" f5. I designed it loosely around the Dobstuff scopes. I went with a smaller ALT bearing, as this is getting servocat treatment. I will be using the servocat system designed for the Meade Lightbridge. All parts designed in CAD and cut on a CNC.


Fellow local boy and ATMer, nice job!

#413 Hemmi

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Posted 30 September 2013 - 02:34 PM

Congrats - nice job!

What CNC router did you use? What type of plywood?


Its a finelineautomation 3x3 CNC router. All wood is cabinet grade Baltic birch

#414 Hemmi

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Posted 30 September 2013 - 02:34 PM

Here is my first homemade scope, its a 10" f5. I designed it loosely around the Dobstuff scopes. I went with a smaller ALT bearing, as this is getting servocat treatment. I will be using the servocat system designed for the Meade Lightbridge. All parts designed in CAD and cut on a CNC.


Fellow local boy and ATMer, nice job!


Thanks

#415 cpr1

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Posted 05 October 2013 - 06:04 PM

Nice job Hemmi. Looks great!

#416 obin robinson

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Posted 20 October 2013 - 05:31 PM

Here's my 4.5" astrograph for planets and satellites. The tube is a 7" Hastings with both ends rolled. The inside is flocked with Scopestuff flocking. The exterior is painted with a dark chameleon paint and covered with a semi gloss clearcoat.


I have a 120mm computer fan on the back of it. I have multiple layers of foam in-between the oversized rings and the OTA. This absorbs all vibrations extremely well. The telescope provides tack sharp stars on an inky black backgroun. Even under high magnification this telescope is outperforming my expectations.

obin:)

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#417 Hemmi

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Posted 28 October 2013 - 08:13 AM

My ATM scope finally finished!

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#418 RP Masciarelli

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Posted 29 October 2013 - 06:27 PM

A Surplus Shed 5" Achromat with a homemade carbon fiber tube, ready for binoviewing. There is also an extension to be threaded before the focuser, to become a 'normal' telescope. Sorry about the dust :)

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#419 R Botero

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Posted 30 October 2013 - 01:16 PM

:cool: :waytogo:

#420 C3P0

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Posted 30 October 2013 - 11:53 PM



Here's my 16" Dob


Hey Scott, is that pic taken at Scopex? (Sorry if the question sounds weird, but you don't have any details of your location)


Martin


Hi Martin

It is - I was in hospital recovering from a motorcycle accident :(. (Luckily only the bike suffered permanent damage).My father-in-law put my scope on display for me.

#421 ATM57

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Posted 31 October 2013 - 05:48 PM

Lots of nice home made scopes :cool: I figured I would throw in one of mine. An all wood 16" F22 Cass on a fork alt/az mount. Smooth and solid as a rock (to my surprise).

My sons hated this scope. The OTA was about 100lbs. They didn't mind helping me set it up in the evenings but hated having to go out late at night helping me put the monster away.

This was the scope that gave me a deeper understanding that bigger was not always better as far as lunar/planetary observing was concerned. It did give me my first views of the moons of Uranus though :shocked:

Scopejunkie

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#422 C3P0

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Posted 31 October 2013 - 11:05 PM

Nice scope! Seeing Uranus' moons ?? Pretty impressive!!
Did you make your own mirrors too. My next scope is an 18" cass - in the polishing phase now

#423 TONGKW

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Posted 31 October 2013 - 11:30 PM

My homemade refractor made with a 70 mm f/6 ED doublet lens in cell, aluminum tube and helical focuser. The set up is lightweight mainly for travelling.

K W TONG
C8+CG5 GT, TSA102+HEQ5 PRO, MK67+Voyager, NexStar 6SE, C5+Mizar K, WO ZS80FD+Kenko NES, Megrez 72FD+Kenko KDS, Mini Borg 50, PST

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#424 ATM57

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Posted 01 November 2013 - 01:27 PM

Nice scope! Seeing Uranus' moons ?? Pretty impressive!!
Did you make your own mirrors too. My next scope is an 18" cass - in the polishing phase now


Thanks. No, I purchased the mirrors. 18"? That will be a beast for sure :shocked: So... What mount are you going to use for the scope?

The pic is of another planetary instrument I built. It's a 10" F/15 Newtonian on a Kinematic mount. No that's not a misprint. It had a built-in barlow in front of the diagonal which gave it a 3x amplification (f/5 primary) and a 15% secondary obstruction. One heck of a planetary scope.

Scopejunkie

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#425 Mirzam

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Posted 01 November 2013 - 06:02 PM

What is the advantage of placing a barlow ahead of the diagonal? Is it to shrink the diagonal? If so, don't you need a larger barlow to intercept the full light cone? Inquiring minds want to know.

JimC






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