Guide me here....

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Astroglide65
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Guide me here....

#1

Post by Astroglide65 » Sat Jan 04, 2020 1:57 pm

Hello everybody,
I'm interested in getting a used Meade ETX-125 EC for packing in the camper when I go on a trip. It can be set up as a EQ but can it be guided with a guide scope and PHD2. I plan on doing the alignment etc. and swap the finder scope for the guide scope. I believe if I can get a long enough exposure I can take a photo of it with my Sony a6000.

Anybody doing what I'm wondering about?

Dano
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#2

Post by Astroglide65 » Sat Jan 04, 2020 5:08 pm

Belay my last, I've decided to go with Explore Scientific iEXOS-100 PMC-Eight Equatorial GoTo Mount System. It appears to be much better and a lot less.
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#3

Post by yobbo89 » Sat Jan 04, 2020 6:14 pm

The mount says it carries 8.6 kg, so that's about 4.3 kg for astro (50% load). what scope are you using ?

edit:hang on, i don't think counterweight is included on the load, the weights are 2x1kg
scopes :gso/bintel f4 12"trust 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/ (upcoming : mesu 200 v2)
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, Thousand Oaks Solar Filter.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel
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KathyNS
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#4

Post by KathyNS » Sat Jan 04, 2020 7:57 pm

Counterweights do not subtract from the capacity. So it is still 8.6 kg for visual, 4.3 kg for AP.
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DSO AP: Orion 200mm f/4 Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on HEQ5 pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome; iOptron CEM60 (pier); Hall's Harbour Observatory (H2O)
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#5

Post by Astroglide65 » Sun Jan 05, 2020 3:34 am

I’ll be using a guide scope and my Sony a6000 camera. I was worried I may have to add a little weight to balance out the counterweights.
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#6

Post by JayTee » Sun Jan 05, 2020 4:27 am

The last thing you want to do is add more weight to this mount. Don't use both counterweights. You are going for as light a payload as you can get away with!

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Main: C-stron CPC1100 #2 Scope: 8" f/7.5 Dob mounted Newt AP Scopes: TPO 6" f/9 RC, ES 80mm f/6 APO G&G Scope: Meade 102mm f/7.8, Bresser 102mm f/4.5 Guide Scopes: 70 & 80mm fracs Mounts: C-stron AVX CGEM & GT Alt-Az, Meade DS2000 Cameras: Canon T3i (x2), ASI120MC Binos: 10X50,10.5X70,15X70 (x2), 25X100 EPs: ES: 21 100°, 30 82° X-Cels: 9, 12, 18, 25 Clubs: RCA & HAS
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#7

Post by yobbo89 » Sun Jan 05, 2020 2:27 pm

what focal length scope are you using ?, there are smaller lighter mount packages out there for small scope/dslr camera photography ,only down side is the ones i checked out only auto guide in ra, not a big deal with a good polar align and reasonable focal length .The mount you're interested in looks more suitable for a longer fl 200mm-400mm + range ,the pros is that it can find your targets with go to, and mosaic imaging/framing.the tri pod looks pretty flimsy, probably would only extend the legs to tier 1 and keep it low to the ground. if you do get this mount, i'd like to hear your opinion on it, i do travel and do a little wide shot astro work when i can.

if wide shot imaging of the milky way is your go then i'd probs recommend something smaller like the Star Adventurer or similar. i took a 1 min exposure of the milky way with a 50 mm lense, i didn't even polar align, i just pointed the mount with a compass ..
scopes :gso/bintel f4 12"trust 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/ (upcoming : mesu 200 v2)
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, Thousand Oaks Solar Filter.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel
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#8

Post by KathyNS » Sun Jan 05, 2020 3:22 pm

If you can't balance the camera with only one counterweight at the top of the bar, then you need a smaller counterweight.

For lightweight loads, I picked up a pair of hand weights and improvised a mount with a pair of pipe clamps. Or you can probably order lighter weights that are made for your mount.
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DSO AP: Orion 200mm f/4 Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on HEQ5 pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome; iOptron CEM60 (pier); Hall's Harbour Observatory (H2O)
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#9

Post by Astroglide65 » Sun Jan 05, 2020 4:15 pm

https://www.cloudynights.com/topic/6432 ... try9153116
This guy is doing really well with a 135mm Samyang Lens. I’m following his lead.
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#10

Post by Astroglide65 » Sun Jan 05, 2020 4:18 pm

I’ll be using the 70-210 kit lens and maybe my 400mm mirror lens for start. I have a 60 mm FL 715mm guide lens I’ll attach to the mount and piggy back the camera ...I hope,
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#11

Post by Astroglide65 » Sun Jan 05, 2020 4:55 pm

Ooops, that guide camera has a FL of 215mm not 715mm.
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#12

Post by yobbo89 » Sun Jan 05, 2020 6:57 pm

I think you'll do fine without the need for a guide scope with a 70-210 kit, those users at cn are doing narrowband with 5 min subs.

with a a600 and a 210 mm lense it brings the resolution to 3.81''/pixel plenty of room for tracking error ,i don't know what the performance is like with the mount but there probably isn't really a need to do star guiding even for 5 mins,the setup from a users at cn is using a 135mm lense with an asi1600mm-c with a resolution of 5.93''/pixel and the guide graph is 1.60''/pixel , more than enough for a 200mm lense and under.

don't mind my blabbering,i'm just intrigue on the performance of the mount from the images of the gear and guide graph , i reckon it could do alot more than a 200mm lense. i'll have to see if these mounts are sold here in aus :D

edit: here is an image from a user at cn, used a 80mm refractor at 600mm fl 3 min exposure with guiding.

https://www.cloudynights.com/uploads/mo ... 665502.jpg
Last edited by yobbo89 on Sun Jan 05, 2020 7:09 pm, edited 1 time in total.
scopes :gso/bintel f4 12"trust 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/ (upcoming : mesu 200 v2)
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, Thousand Oaks Solar Filter.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel
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#13

Post by Astroglide65 » Sun Jan 05, 2020 7:01 pm

Thanks for the reply, you know a lot more than me! If I can get 4 or minute exposures I'd be very happy!

Dano
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#14

Post by Astroglide65 » Sun Jan 05, 2020 8:31 pm

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