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ATM, Optics and DIY Forum

Amateur Telescope Making (ATM) and any do it yourself related activities. Ask questions, discuss and post pictures of telescope related projects, optics, telescopes, observing chairs, etc.

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Topic	Stats	Last Post Info
Pinned Post your home made scope Started by droid , 22 Jan 2013 1 2 3 58 →	Hot 1,447 replies 294,380 views	Stipe Vladova Today, 05:28 PM
Pinned Post your Optical Design! (This is a no-discussion thread!) Started by Sean Cunneen , 05 Nov 2019	15 replies 1,543 views	Ed Jones 03 Jan 2020
Pinned Best of ATM and Help Started by MMICKELS , 02 Jul 2005	0 replies 53,392 views	MMICKELS 02 Jul 2005
6" F3 Mirror and Scope Build Started by Aaron_tragle , 02 Dec 2019 1 2 3 6 →	Hot 146 replies 3,894 views	Garyth64 Today, 07:30 PM
12 inch f 4.9 synta mirror Started by stargeeser , Today, 06:47 PM	0 replies 58 views	stargeeser Today, 06:47 PM
Tools needed to construct dob Started by Starman47 , Yesterday, 08:46 AM	23 replies 249 views	a__l Today, 06:41 PM
IS PROTOSTAR STILL IN BUSINESS or GO DIRECTLY TO ANTARES? Started by RalphMeisterTigerMan , 09 Apr 2019 1 2	29 replies 1,572 views	Starman1 Today, 06:13 PM
Warning about treepaning and slumping soda lime glass: Started by stargazer193857 , 05 Dec 2019	7 replies 496 views	GTom Today, 05:10 PM
8" mirror making Started by mihaiG , 26 Nov 2019 1 2 3 4	Hot 81 replies 2,378 views	dogbiscuit Today, 05:06 PM
Did I do something wrong or does this type of mount really suck? Started by Jbhillman , Yesterday, 06:36 PM	15 replies 586 views	Dale Eason Today, 04:22 PM
Can I use 19mm thick plate glass to grind 14 inch mirror ? Started by SAMAPTIN , 08 Oct 2018 1 2	29 replies 865 views	GTom Today, 04:16 PM
What did you work on today? Started by Sean Cunneen , 18 Feb 2015 1 2 3 178 →	Hot 4,428 replies 253,243 views	RFeaster Today, 03:07 PM
SS 76mm Maksutov Cassegrain Started by Arjan , 02 Oct 2019 1 2 3 4	Hot 89 replies 2,411 views	Arjan Today, 02:28 PM
800mm f/3.3 Telescope Project Started by skround , 27 Aug 2019 1 2 3 9 →	Hot 204 replies 9,569 views	skround Today, 02:21 PM
Refractor baffles for several upcoming builds Started by PaulEK , 28 Jan 2019 1 2	25 replies 692 views	$Refractor baffles for several upcoming builds - last post by Jeff B$ Jeff B Today, 12:08 PM
Making a first mirror: 10" f6 Started by Chris Adamczyk , 19 Nov 2019 1 2 3 4	Hot 91 replies 2,400 views	Jeff B Today, 10:41 AM
Istar 8" F9 OTA Build Started by Jeff B , 31 Dec 2019 1 2	37 replies 1,050 views	MalVeauX Today, 09:53 AM
How to calc max field of view with maximum aperture. Started by Neptune , Yesterday, 01:29 PM	20 replies 186 views	Jon Isaacs Today, 06:14 AM
ST80 mods. Started by rogan , 15 Jan 2020	19 replies 371 views	Jon Isaacs Today, 05:27 AM
The ultimate planetary eyepiece design? Started by BKSo , 10 Jan 2020 eyepieces, optics 1 2	44 replies 1,088 views	luxo II Today, 03:47 AM
Problem with Surplus Shed Started by Steve Dodds , 17 Jan 2020	7 replies 452 views	luxo II Today, 01:26 AM
DIY refractor focuser alignment Started by AlphaGJohn , Yesterday, 06:52 PM DIY, collimation, refractor	2 replies 77 views	$DIY refractor focuser alignment - last post by AlphaGJohn$ AlphaGJohn Today, 12:20 AM
Newtonian Camera? Started by hukhound , 20 Jul 2019 ATM, astrophotography, EAA and 1 more...	20 replies 743 views	GTom Yesterday, 03:02 PM
Common mistakes when building a Dobson Started by Lucullus , 31 Dec 2019 1 2	44 replies 1,555 views	GTom Yesterday, 01:10 PM
How is focal length defined in an aberrating lens (system) Started by bitnick , 17 Jan 2020	8 replies 139 views	bitnick Yesterday, 11:35 AM
Paint as Formica substitute Started by Lognic04 , 16 Jan 2020 1 2	27 replies 492 views	Jon Isaacs Yesterday, 09:28 AM
Secondary size for bino-Newton? Started by mcmaker , 17 Jan 2020	6 replies 157 views	mcmaker Yesterday, 05:11 AM
Collimate Surplus Shed 127 mm lens Started by JackN , 17 Jan 2020	3 replies 151 views	Bonham 17 Jan 2020
WHERE TO BUY REFRACTOR ASSEMBLY KITS 80MM? Started by RalphMeisterTigerMan , 15 Jan 2020	10 replies 238 views	Jon Isaacs 17 Jan 2020
Fusion 360 and Mcmaster Carr PSA Started by megachriops95 , 17 Jan 2020	0 replies 140 views	megachriops95 17 Jan 2020
Plans for 8 or 10 inch Newtonian with open tube? Started by Halfwhelk , 16 Jan 2020 DIY, ATM, beginner	6 replies 201 views	ccaissie 17 Jan 2020
3,5 inch aluminum mirror Started by marcosbaun , 02 Jan 2020	6 replies 243 views	marcosbaun 17 Jan 2020
A Fractal Flexural Mirror Support Started by Oberon , 13 Dec 2019 ATM 1 2 3 5 →	Hot 123 replies 2,770 views	Oberon 17 Jan 2020
Vacuum formed Mylar Mirror ? Started by efanton , 10 Jan 2020 DIY, mirror making 1 2 3	Hot 62 replies 1,013 views	Oregon-raybender 17 Jan 2020
J.T.'s 8" f/10.6 Ed Jones Chiefspiegler build Started by jtsenghas , 27 Aug 2019 1 2 3 4	Hot 92 replies 2,737 views	jtsenghas 17 Jan 2020
The Unicorn Project Started by Mike Spooner , 15 Jan 2020	17 replies 421 views	calypsob 17 Jan 2020
Home made Binocular fork mount Started by tomb18 , 11 Jan 2020	3 replies 373 views	John Miele 17 Jan 2020
Source for edge lit Acrylic? (flat panels, etc) Started by jdk , 16 Jan 2020	7 replies 311 views	jdk 17 Jan 2020
tube for 6'' refractor Started by dron2015 , 15 Jan 2020	9 replies 235 views	$tube for 6'' refractor - last post by Bob4BVM$ Bob4BVM 17 Jan 2020
Gluing teflon to wood. What type of glue? Started by Cotts , 13 Jan 2020 1 2	38 replies 719 views	calypsob 16 Jan 2020
Would you make your own kiln? Started by stargazer193857 , 27 Dec 2018 1 2 3 4	Hot 83 replies 2,507 views	GTom 16 Jan 2020
Coring elliptical secondaries from military glass Started by ccaissie , 14 Jan 2020	16 replies 311 views	jtsenghas 16 Jan 2020
Az Setting Circle? Started by S.Boerner , 16 Jan 2020	8 replies 131 views	Oberon 16 Jan 2020
DIY Alnitak flat panel Started by spokeshave , 09 May 2016 1 2 3 4	Hot 98 replies 19,149 views	turbo_pascale 16 Jan 2020
Fixed my lathe and cut my first optical threads! :) Started by kw6562 , 30 Dec 2019 ATM, DIY 1 2	39 replies 1,085 views	kw6562 16 Jan 2020
how fast did you correct a mirror? Started by Mark Harry , 12 Jan 2020	10 replies 381 views	Mark Harry 16 Jan 2020
Dob secondary mirror help Started by Altair91 , 15 Jan 2020	4 replies 124 views	Oberon 16 Jan 2020
DobStuff Rocker box for my Serrurier Truss 12.5". Started by Cotts , 14 Jan 2020	17 replies 287 views	Dennis Steele 16 Jan 2020
What material for a portable pier tube Started by JeffB , 11 Jan 2020	17 replies 276 views	MikiSJ 15 Jan 2020
J.T.'s 12.5" F/4.3 Hexapod Dob Started by jtsenghas , 02 Jan 2019 1 2 3 10 →	Hot 228 replies 8,626 views	jtsenghas 15 Jan 2020