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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 51 →	Hot 1258 replies 225066 views	michaelm_7110 18 Oct 2018
Pinned New Photo Size Guidelines in CN 3.0. Started by richard7 , 15 Sep 2014	0 replies 5215 views	richard7 15 Sep 2014
Pinned Ron Ravneberg Memorial Scope Gallery Started by RRavneberg , 29 Dec 2007 1 2 3 4	Hot 77 replies 42579 views	Don W 03 Feb 2009
Pinned Best of ATM and Help Started by MMICKELS , 02 Jul 2005	0 replies 50333 views	MMICKELS 02 Jul 2005
Diy coma corrector - can it be done? Started by Lognic04 , 12 Aug 2018	10 replies 379 views	stargazer193857 Today, 09:44 PM
Making a 6 inch F3 Mirror/Dob Started by Lognic04 , 19 Aug 2018 ATM, lens making, mirror making and 3 more... 1 2 3 11 →	Hot 269 replies 6017 views	Lognic04 Today, 09:37 PM
meniscus vs plano Started by hakann , 20 Oct 2018	12 replies 258 views	Pinbout Today, 09:28 PM
Ready to figure a 14" F4.5. Suggestions very welcome Started by kur3tking , 02 Oct 2018 1 2	26 replies 445 views	Pinbout Today, 09:20 PM
Towa 80mm f15 from the objective down Started by pselaphid , Today, 07:08 PM	2 replies 67 views	mashirts Today, 08:10 PM
Persistent edge problem Started by ckh , 21 Aug 2018 1 2 3 20 →	Hot 482 replies 6950 views	dogbiscuit Today, 08:02 PM
16" Zambuto Build Started by ad701xx , 31 Aug 2018 1 2 3	Hot 63 replies 1639 views	ad701xx Today, 07:51 PM
What did you work on today? Started by Sean Cunneen , 18 Feb 2015 1 2 3 123 →	Hot 3063 replies 157909 views	Sean Cunneen Today, 07:25 PM
Mirror stiffness Started by hakann , Yesterday, 01:28 PM	11 replies 245 views	jtsenghas Today, 07:22 PM
20” f/4 - The Insanity Continues (again) Started by Augustus , 19 Aug 2018 1 2 3 11 →	Hot 262 replies 10545 views	Dale Eason Today, 06:59 PM
ALWAYS STRAIN TEST YOUR BLANKS! Started by Augustus , 21 Oct 2018 1 2	31 replies 710 views	Pinepig Today, 05:44 PM
Thread seizure Started by Anding , 18 Oct 2018	9 replies 383 views	Geo. Today, 04:12 PM
Pitch Lap Re-usable? Started by Tom Duncan , Yesterday, 01:32 PM	9 replies 255 views	mark cowan Today, 04:05 PM
Truss tube collimation - the hexapod thread Started by Oberon , 02 Mar 2017 ATM 1 2 3 12 →	Hot 288 replies 12646 views	jtsenghas Today, 03:53 PM
250 mirror blank, 16.6mm thick Started by brebisson , 18 Oct 2018 1 2	43 replies 468 views	Pinbout Today, 03:07 PM
Edmund's simple lens focal length calculator Started by Oregon-raybender , Today, 02:43 PM ATM, beginner, DIY, imaging and 3 more...	0 replies 51 views	Oregon-raybender Today, 02:43 PM
Pitch hardness opinions Started by Lognic04 , 21 Oct 2018	9 replies 152 views	ed_turco Today, 11:06 AM
17.5" BinoScope Build Started by Bob4BVM , 04 May 2018 1 2 3 5 →	Hot 117 replies 4522 views	Bob4BVM Today, 12:25 AM
best coating for aluminum tube? Started by NHRob , 20 Oct 2018	23 replies 330 views	GShaffer Yesterday, 08:12 PM
Build a refractor with an antique brass objective Started by oliver55 , Yesterday, 11:03 AM	7 replies 188 views	$Build a refractor with an antique brass objective - last post by dogbiscuit$ dogbiscuit Yesterday, 05:52 PM
Nils Olof Carlin Started by Vic Menard , 15 Aug 2017 1 2 3	Hot 71 replies 7489 views	Jon Isaacs Yesterday, 05:15 PM
Saving an unsaveable Virtuoso Mak - home made collimation mechanism Started by miannini , 14 Sep 2015	3 replies 1278 views	Ewung Yesterday, 04:21 PM
Local coaters in New England area Started by Augustus , 19 Oct 2018	14 replies 321 views	ccaissie Yesterday, 09:41 AM
Introducing the Dual Speed Helical Crayford Focuser Started by Pierre Lemay , 30 Jul 2018 1 2 3 4	Hot 82 replies 2951 views	Pierre Lemay Yesterday, 05:47 AM
Suggestions for Gregorian Started by Billyboy78 , 01 Apr 2018 1 2 3 5 →	Hot 115 replies 2843 views	Billyboy78 21 Oct 2018
Pitch hardness opinions Started by Lognic04 , 21 Oct 2018	2 replies 57 views	kfrederick 21 Oct 2018
Moveable weights on telescope tubes Started by Lucullus , 19 Oct 2018	20 replies 362 views	Garyth64 21 Oct 2018
What happened to the massive ATM scope in Utah? Started by woodscavenger , 10 Jan 2016 1 2	27 replies 2387 views	JoshH 21 Oct 2018
Round vs Square mirror box. Started by jpcannavo , 17 Oct 2018	6 replies 270 views	jpcannavo 21 Oct 2018
Exterior translucide wood stain or clear varnish? Started by N3p , 21 Oct 2018	2 replies 86 views	N3p 21 Oct 2018
Painting Aluminum Tube. Started by Auburn80 , 09 Oct 2018 1 2	28 replies 572 views	Pinbout 21 Oct 2018
USB corded shutter control for Nikon Started by ccs_hello , 08 Apr 2014 1 2 3 5 →	Hot 119 replies 18468 views	moxican 21 Oct 2018
Arduheater - open source intelligent heat strip controller (dew buster) Started by jbrazio , 03 Aug 2017 DIY, imaging 1 2 3	Hot 71 replies 3193 views	jbrazio 20 Oct 2018
Pound-Drever-Hall Technique Started by jfrech14 , 20 Oct 2018	7 replies 150 views	steveastrouk 20 Oct 2018
Success! Finally made a eqdirect to usb cable and setting up my remote pc setup. Started by spacemunkee , 20 Oct 2018	4 replies 70 views	spacemunkee 20 Oct 2018
Large Amateur Telescope - Group 70 Started by Old Will , 20 Aug 2015	17 replies 1642 views	Oregon-raybender 20 Oct 2018
Crap I had around the house 8 1/4 inch F3.7 first mirror ever Started by Pinepig , 16 Sep 2018 1 2 3	Hot 56 replies 920 views	Pinepig 20 Oct 2018
Topher's 18" F4 UL Dob Build Started by TopherTheME , 03 Oct 2015 1 2 3 4	Hot 98 replies 7273 views	TopherTheME 20 Oct 2018
Lets talk Sub diameter laps Started by Stargazer , 02 Sep 2018 1 2	39 replies 639 views	dogbiscuit 20 Oct 2018
Building a DIY motorized control for a Skywatcher EQ5 mount Started by DHEB , 13 Oct 2018 DIY, mount	17 replies 287 views	DHEB 20 Oct 2018
Maximum current on RCA cables? Started by Bill Kocken , 19 Oct 2018	7 replies 156 views	ccs_hello 20 Oct 2018
Wireless 12V PWM fan control for dobs? Started by jtsenghas , 19 Oct 2018	5 replies 75 views	Pinbout 19 Oct 2018
DIY Remote Dew Heater for $9 Started by CharlesC , 18 Oct 2018	5 replies 160 views	jtsenghas 19 Oct 2018
Stepper motor and controller for fok: any DIY projects? Started by Fukinagashi , 17 Oct 2018	4 replies 176 views	Adun 19 Oct 2018
Correcting a 10" flat Started by ccaissie , 21 Sep 2018 1 2 3 8 →	Hot 199 replies 2804 views	Mark Harry 19 Oct 2018
Mirror Grinding Set - an issue and a Q Started by organge , 18 Oct 2018	4 replies 145 views	Spoonsize 19 Oct 2018