RTMC Astronomy Expo (Sept 19-22)

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RTMC Astronomy Expo (Sept 19-22)

#1

Post by terrynak »


Last weekend (Sept 19-22) I attended the annual 51st RTMC Astronomy Expo at YMCA Camp Oakes, not far from Big Bear City. I went with my friend Tim, who was one of the featured speakers at the event. This was the first time it was being held in September (normally a Memorial Day weekend event.

Here is my one-man Marmot tent (in the background is the red van that brought us here):

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Here are some of the telescopes/binoculars that people brought to the party:

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This was the first star party I attended where I spent most of the night looking through other people’s telescopes, rather than observing through my own. Rather than a telescope, I brought along binoculars (8 x 35) that a dealer gave me for free at last year’s RTMC. I did some serious binocular observing in dark skies for the very first time. It was a revelation for me, especially with the Milky Way riding high in the sky.

One of the highlights of this event is the Merit Award competition for homemade telescopes and related astronomy accessories, moderated by Richard Ozer of the Eastbay Astronomical Society (in Oakland):

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Here were some of the DIY award winners at the event:

o) 6” F/10 refractor (Jamie Countryman):

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o) 8” F/12 refractor (Dave Radosevich):

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o) Motorized binocular chair (Jeff Jolin):

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o) 6” F/15 refractor (Leonard Higgins):

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o) 10” F/5.25 reflector (Mike Traszki):

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o) 6” F/8 refractor (Robert Pfaff):

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o) 6” F/15 refractor (Gerry Logan):

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This year, refractors dominated the awards.

Thanks for reading!
Scopes: Reflectors, refractors, and 1 catadioptric. Ranging in aperture from 50mm to 150mm.
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Re: RTMC Astronomy Expo (Sept 19-22)

#2

Post by notFritzArgelander »


Thanks for an enjoyable report!
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: RTMC Astronomy Expo (Sept 19-22)

#3

Post by JayTee »


Excellent report Terry with many fine pictures.

Thank you,
JT
∞ Primary Scopes: #1: Celestron CPC1100 #2: 8" f/7.5 Dob #3: CR150HD f/8 6" frac
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
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∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°

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Re: RTMC Astronomy Expo (Sept 19-22)

#4

Post by bladekeeper »


Good stuff, Terry, and awesome photos! :)
Bryan
Scopes: Apertura AD12 f/5; Celestron C6-R f/8; ES AR127 f/6.4; Stellarvue SV102T f/7; iOptron MC90 f/13.3; Orion ST80A f/5; ES ED80 f/6; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen Polaris
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Re: RTMC Astronomy Expo (Sept 19-22)

#5

Post by Bigzmey »


Sounds like a fun event. Thanks for the great report Terry!

Is that scope mounted on the station wagon is for real?! :)
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
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Re: RTMC Astronomy Expo (Sept 19-22)

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Post by John Baars »


Great report
Great photo's!
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX.
GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets).
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Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS, *Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40
Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt.
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Re: RTMC Astronomy Expo (Sept 19-22)

#7

Post by terrynak »


Thanks nFA, JT, Bryan, Andrey, and John for the comments! I'm just glad I was able to post pictures on this site the same way I did on the AF.

Andrey, that scope on the station wagon looks like a huge artillery gun!
Scopes: Reflectors, refractors, and 1 catadioptric. Ranging in aperture from 50mm to 150mm.
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Re: RTMC Astronomy Expo (Sept 19-22)

#8

Post by Don Quixote »


I have just read and thoroughly enjoyed this report, Terry. Thank you for the great photographs as well.
I would love to attend such a gathering.

The DIY telescopes are quite attractive to me.
Over the last year I have been looking at D&G lens cells, dreaming... :Astronomer1: A 6 or 8 inch f/12 or f/15...

It will probably never happen, but your report has stirred the mind again. 😊
Thank you.
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Re: RTMC Astronomy Expo (Sept 19-22)

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Post by SkyHiker »


Thanks for the report with great pictures Terry!

I was there too and wrote a blurb but seeing is believing... hopefully this will attract more TSS-ers next year, it's a great event at a great location.

The hiking is good there too, the Pacific Crest Trail can be accessed from a trail right behind the YMCA about 1/2 mile away. The hike and landscape are amazing.
... Henk. :D Telescopes: GSO 12" Astrograph, "Comet Hunter" MN152, ES ED127CF, ES ED80, WO Redcat51, Z12, AT6RC, Celestron Skymaster 20x80, Mounts and tripod: Losmandy G11S with OnStep, AVX, Tiltall, Cameras: ASI2600MC, ASI2600MM, ASI120 mini, Fuji X-a1, Canon XSi, T6, ELPH 100HS, DIY: OnStep controller, Pi4b/power rig, Afocal adapter, Foldable Dob base, Az/Alt Dob setting circles, Accessories: ZWO 36 mm filter wheel, TV Paracorr 2, Baader MPCC Mk III, ES FF, SSAG, QHY OAG-M, EAF electronic focuser, Plossls, Barlows, Telrad, Laser collimators (Seben LK1, Z12, Howie Glatter), Cheshire, 2 Orion RACIs 8x50, Software: KStars-Ekos, DSS, PHD2, Nebulosity, Photo Gallery, Gimp, CHDK, Computers:Pi4b, 2x running KStars/Ekos, Toshiba Satellite 17", Website:Henk's astro images
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Re: RTMC Astronomy Expo (Sept 19-22)

#10

Post by terrynak »


Don Quixote wrote: Sun Oct 06, 2019 8:37 pm I have just read and thoroughly enjoyed this report, Terry. Thank you for the great photographs as well.
I would love to attend such a gathering.

The DIY telescopes are quite attractive to me.
Over the last year I have been looking at D&G lens cells, dreaming... :Astronomer1: A 6 or 8 inch f/12 or f/15...

It will probably never happen, but your report has stirred the mind again. 😊
Thank you.
Hi Mark,

Glad you enjoyed the home-made/modified telescopes! Just good to know that people are still hand-crafting their own scopes.

BTW, RTMC stands for Riverside Telescope Maker's Conference.
Scopes: Reflectors, refractors, and 1 catadioptric. Ranging in aperture from 50mm to 150mm.
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Re: RTMC Astronomy Expo (Sept 19-22)

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Post by terrynak »


SkyHiker wrote: Sun Oct 06, 2019 11:52 pm Thanks for the report with great pictures Terry!

I was there too and wrote a blurb but seeing is believing... hopefully this will attract more TSS-ers next year, it's a great event at a great location.

The hiking is good there too, the Pacific Crest Trail can be accessed from a trail right behind the YMCA about 1/2 mile away. The hike and landscape are amazing.
Thanks Henk!

I think the September time of year is better for RTMC. Better showpieces in the sky, especially with the Milky Way riding high this time of year. Our Memorial Day Weekend can then be used for doing other things...

I'm going to try doing some hiking around the area at next year's event. Yup, the surrounding area around YMCA Camp Oakes is beautiful.
Scopes: Reflectors, refractors, and 1 catadioptric. Ranging in aperture from 50mm to 150mm.
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Re: RTMC Astronomy Expo (Sept 19-22)

#12

Post by Makuser »


Hi Terry. Thanks for the great photos of the 51st RTMC Astronomy Expo at YMCA Camp Oakes. It looks like a good time was had by all.
Marshall
Sky-Watcher 90mm f/13.8 Maksutov-Cassegrain on motorized Multimount
Orion Astroview 120ST f/5 Refractor on EQ3 mount
Celestron Comet Catcher 140mm f/3.64 Schmidt-Newtonian on alt-az mount
Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives.
Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount.
Orion XT12i 12" f/4.9 Dobsonian Intelliscope.
Kamakura 7x35 Binoculars and Celestron SkyMaster 15x70 Binoculars. ZWO ASI 120MC camera.
>)))))*>
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Re: RTMC Astronomy Expo (Sept 19-22)

#13

Post by BamaDon »


Terry, thanks so much for that post! I recall the car-mounted refractor from many years ago - was it Jeff Schroeder? - but back then he had a Volkswagen Beetle.

I learned about ATM from Gerry Logan and Bob Pfaff when I was a 15yo kid at the OCA's Elsinore site. Back then he was into Maksutovs; now he does folded refractors.

It appears that they are all still building Schaeffer-inspired mounts. I recall the star party was always Mother's Day weekend, for some reason.
Don
Scopes: Criterion RV-6; 8" f/8 homebuilt; 10" Cave OTA; 12.5" Dobsonian; Celestron C11 Mounts: Losmandy G11 Eyepieces: ES 82° 24, 18, 14, 11, 8.8, 6.7, 4.7; Meade RG: Erfle 20; Ortho 16.8, 10.5, 7 Binoculars: Orion Ultraview 10x50; Filters: DGM NPB, O-III; Orion SkyGlow; DSLR: Canon t6i
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Re: RTMC Astronomy Expo (Sept 19-22)

#14

Post by SkyHiker »


For those who missed the news, this was the last RTMC expo: viewtopic.php?f=9&t=3928 , sadly!
... Henk. :D Telescopes: GSO 12" Astrograph, "Comet Hunter" MN152, ES ED127CF, ES ED80, WO Redcat51, Z12, AT6RC, Celestron Skymaster 20x80, Mounts and tripod: Losmandy G11S with OnStep, AVX, Tiltall, Cameras: ASI2600MC, ASI2600MM, ASI120 mini, Fuji X-a1, Canon XSi, T6, ELPH 100HS, DIY: OnStep controller, Pi4b/power rig, Afocal adapter, Foldable Dob base, Az/Alt Dob setting circles, Accessories: ZWO 36 mm filter wheel, TV Paracorr 2, Baader MPCC Mk III, ES FF, SSAG, QHY OAG-M, EAF electronic focuser, Plossls, Barlows, Telrad, Laser collimators (Seben LK1, Z12, Howie Glatter), Cheshire, 2 Orion RACIs 8x50, Software: KStars-Ekos, DSS, PHD2, Nebulosity, Photo Gallery, Gimp, CHDK, Computers:Pi4b, 2x running KStars/Ekos, Toshiba Satellite 17", Website:Henk's astro images
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Re: RTMC Astronomy Expo (Sept 19-22)

#15

Post by pakarinen »


terrynak wrote: Mon Sep 30, 2019 7:10 am
Image
That's no telescope, that's a freaking howitzer...
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Re: RTMC Astronomy Expo (Sept 19-22)

#16

Post by yobbo89 »


That cannon refractor haha.
thanks for the images.

I had look at the point system picture for the merit award, what! only 2 points for homemade optics!
Attachments
5622985-1024x678.jpg
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: RTMC Astronomy Expo (Sept 19-22)

#17

Post by terrynak »


Makuser wrote: Mon Oct 07, 2019 7:36 pm Hi Terry. Thanks for the great photos of the 51st RTMC Astronomy Expo at YMCA Camp Oakes. It looks like a good time was had by all.

You're welcome Marshall. It was fun.

BamaDon wrote: Tue Oct 15, 2019 1:27 am Terry, thanks so much for that post! I recall the car-mounted refractor from many years ago - was it Jeff Schroeder? - but back then he had a Volkswagen Beetle.

I learned about ATM from Gerry Logan and Bob Pfaff when I was a 15yo kid at the OCA's Elsinore site. Back then he was into Maksutovs; now he does folded refractors.

It appears that they are all still building Schaeffer-inspired mounts. I recall the star party was always Mother's Day weekend, for some reason.

Thanks Don! Re: Gerry and Bob - we usually set up camp right next to theirs.

SkyHiker wrote: Tue Oct 15, 2019 4:08 am For those who missed the news, this was the last RTMC expo: viewtopic.php?f=9&t=3928 , sadly!

That is really sad news Henk !!! :naughty:

pakarinen wrote: Tue Oct 15, 2019 1:30 pm
That's no telescope, that's a freaking howitzer...

Yup!

yobbo89 wrote: Tue Oct 15, 2019 1:45 pm That cannon refractor haha.
thanks for the images.

I had look at the point system picture for the merit award, what! only 2 points for homemade optics!

You're welcome Yobbo! Good that you noticed that...
Scopes: Reflectors, refractors, and 1 catadioptric. Ranging in aperture from 50mm to 150mm.
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Re: RTMC Astronomy Expo (Sept 19-22)

#18

Post by Juno16 »


Thanks Terry! Sounds like an amazing experience! What a wonderful array of home built instruments! Great photos and read. Thanks! Jim
Jim

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Re: RTMC Astronomy Expo (Sept 19-22)

#19

Post by Makuser »


Hi Terry and all. I want to thank you again for your great photos of the 51st RTMC Astronomy Expo. I thought that you and the other folks would enjoy these photos of how this amateur astronomer from California did it in the late 1930's and early 1940's :lol:
Carscope1.jpg
Carscope1.jpg (6.18 KiB) Viewed 3358 times
Carscope2.jpg
Carscope3.jpg
I hope that all of you enjoy these, and the best of regards.
Marshall
Sky-Watcher 90mm f/13.8 Maksutov-Cassegrain on motorized Multimount
Orion Astroview 120ST f/5 Refractor on EQ3 mount
Celestron Comet Catcher 140mm f/3.64 Schmidt-Newtonian on alt-az mount
Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives.
Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount.
Orion XT12i 12" f/4.9 Dobsonian Intelliscope.
Kamakura 7x35 Binoculars and Celestron SkyMaster 15x70 Binoculars. ZWO ASI 120MC camera.
>)))))*>
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Re: RTMC Astronomy Expo (Sept 19-22)

#20

Post by yobbo89 »


Ahah, how does one drive down the freeway with that thing.
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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