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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5665165 - 02/06/13 12:37 PM

For using two scopes at the same time, I'm not familiar with the Twilight II. A quick Google search turned up nothing with regards to finely adjusting the pointing direction of one scope in order to precisely aligh the two scopes. This may not be a problem with wide-angle views, but could be problematic with high power (100x + ?) views.

The options I'm familiar with include:

Universal Astronomics Double-Star ($699 but can hold a 30lb scope on the left and a 40lb scope on the right, and you can collimate the two so they point to the same location at high power.

One of the mounts from http://www.desertskyastro.com/DSV-2.html with dual-scope option. From what I've read, while motions with the Desert Sky scopes are very smooth, it can be tricky to change eyepieces and not lose your target.

The Desert Sky mount would be cheaper than the DoubleStar, but the DoubleStar handles bigger scopes. That may not be a problem right now, but could be with something bigger like a 5"+ refractor.


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Dave Mitsky
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Reged: 04/08/02

Loc: PA, USA, Planet Earth
Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5665206 - 02/06/13 01:01 PM

I would choose the 30mm Explore Scientific eyepiece over the 41mm Panoptic due to the increased "contrast" created by its higher magnification, as well as its lower cost.

Dave Mitsky


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5665214 - 02/06/13 01:04 PM

Looking thru the threads, there are numerous side-by-side setupes. Theres a Canadian company that sells a EQ mount specially made for side by side mounting.....

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coopman
Post Laureate
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Reged: 04/23/06

Loc: South Louisiana
Re: Bought scope and mount - now need eyepieces new [Re: csrlice12]
      #5665228 - 02/06/13 01:09 PM

If you don't have the two scopes carefully balanced on the mount, they can possibly move when you insert or remove an eyepiece if the weight difference between the eyepieces is a lot and the altitude axis is not locked.

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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: Bought scope and mount - now need eyepieces new [Re: coopman]
      #5665232 - 02/06/13 01:11 PM

As far as side-by-side setups are concerned, using one on an equatorial mount for TWO-PERSON use could be interesting.

When pointed EAST, scope 1 is below scope 2.
When pointed SOUTH, scopes are next to each other.
When pointed WEST, scope 1 is above scope 2.


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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: Bought scope and mount - now need eyepieces new [Re: coopman]
      #5665236 - 02/06/13 01:13 PM

Quote:

If you don't have the two scopes carefully balanced on the mount, they can possibly move when you insert or remove an eyepiece if the weight difference between the eyepieces is a lot and the altitude axis is not locked.




With the Universal Astronomics mount, you can set the tension high enough that the scopes don't move when you change eyepieces.


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: Bought scope and mount - now need eyepieces new [Re: Thomas Karpf]
      #5665243 - 02/06/13 01:16 PM

Quote:

As far as side-by-side setups are concerned, using one on an equatorial mount for TWO-PERSON use could be interesting.

When pointed EAST, scope 1 is below scope 2.
When pointed SOUTH, scopes are next to each other.
When pointed WEST, scope 1 is above scope 2.




Well, we could put red, yellow, green, and blue dots on it and call it the "TwisterScope".....


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FTLAUDSKY
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Reged: 01/21/13

Re: Bought scope and mount - now need eyepieces new [Re: csrlice12]
      #5665562 - 02/06/13 03:57 PM

Ok so nobody has tried this setup before personally? I could just get a normal mount and put her scope on it. I just thought it would be cool to compare two different scopes with different eyepieces. The ES Twilight II mount looks sturdy and from what I have been reading is a good deal for what you get. I'll keep researching...

So what would you get? - ES 30MM 82* or ES20MM 100*
I'm leaning towards the 30MM, but for $50 more you get the 100*


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5665573 - 02/06/13 04:06 PM

Oh my, you're in REAL coin flipping territory there. Both of these are fantastic eyepieces. I'd lean towards the ES 30mm 82* though because you have some smaller refractors and if you use wide-fields in smaller refractors, you will start seeing field curvature (normally the wider the field, the more field curvature). YMMV though, and others with this type scope might feel differently. Another consideration (same price as the ES 20mmm 100*) would be to get the ES 82 30mm AND the ES 68* 20mm (if you want a 20mm)--both are very highly rated.

Edited by csrlice12 (02/06/13 04:10 PM)


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lamplight
Carpal Tunnel
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Reged: 09/18/12

Loc: western MA, U.S.
Re: Bought scope and mount - now need eyepieces new [Re: csrlice12]
      #5665765 - 02/06/13 06:08 PM

The 100° ones are on sale ough right? There is a popular dual saddle replacement that works with the cg-5 which might work with your newer mount from ADM: http://admaccessories.com/

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FTLAUDSKY
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Reged: 01/21/13

Re: Bought scope and mount - now need eyepieces new [Re: lamplight]
      #5666019 - 02/06/13 09:12 PM Attachment (7 downloads)

So I was browsing Craiglist - Just got back. I picked up an older William Optics 80ED Zenithstar, WO case, and a few EP's(9mm,20mm,25mm plossl's). Talked to the seller and he seemed like a nice guy. He was selling it for a friend. I got it for great price.


I got another scope for fun now without having to worry. I'm really excited

Edited by FTLAUDSKY (02/06/13 09:13 PM)


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FTLAUDSKY
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Reged: 01/21/13

Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5666024 - 02/06/13 09:14 PM Attachment (7 downloads)

Here is a picture of the business end....

By the way there was a Televue 40mm plossl box in the case with no EP....oh well...


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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5666066 - 02/06/13 09:34 PM

Quote:

So I was browsing Craiglist - Just got back. I picked up an older William Optics 80ED Zenithstar, WO case, and a few EP's(9mm,20mm,25mm plossl's). Talked to the seller and he seemed like a nice guy. He was selling it for a friend. I got it for great price.





Wow, what a deal. Now your girlfriend has a scope she can use. Will you be seriously looking for a side-by-side mount now?


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FTLAUDSKY
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Reged: 01/21/13

Re: Bought scope and mount - now need eyepieces [Re: Thomas Karpf]
      #5666111 - 02/06/13 10:01 PM

Funny how I was looking at dual mounts today and didn't have a second scope. I browse on craiglist with one phone call and 1 hour later I have another scope. I am one happy camper! I feel like it was ment for me. As for the mount I think it would be cool to have them side by side to see the difference in a doublet vs triplet. That or I could get the ADM plate and have them both mounted on the VX. Either way its a win.

On a side note: So thankful on top of the good deal to be writing this. A drunk driver almost hit me on the drive home. He passed me going over a 100 in the emergency lane. Passed three or four cars in the center emergency lane. Left everyone in the dust. There was a cop ahead that was going faster and left the pack of cars about 2-3 earlier. Well I got over two overpasses and the cop has his lights on. Guy wrecked as he passed the cop in the emergency lane. He had to have flipped. The SUV was mangled - door ripped off, top smashed in, guy passed out. I pulled over and after 2-3 minutes the guy woke up. Asked what happened. I told the cop what happened and that is when he said he knew cause he passed him as well the same way. Crazy!!

Anyways - I'm seriously looking at the twilight II mount now. It has gotten great reviews from what I read. Anways I'm probably going to hold off now on the 30MM 82* for a few days....lol


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FTLAUDSKY
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Reged: 01/21/13

Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5667552 - 02/07/13 05:44 PM Attachment (5 downloads)

So I got my T adapter and hooked up the GT81 Field Flattner and the new scope focuses. Here is the setup. The tripod is overloaded, but its holding and doesn't shake unless you touch it. Have the remote so I don't have to touch. Whatcha think? Formated the SD card and going to play with settings tonight with the laptop using digicam. Not expecting anything great, but who knows....

Nikon D80 by the way - wish I bought a Canon but who knew I'd be taking pictures with a telescope 3 yrs later. Gotta research now camera settings. Any recommendations on ISO and Apeture (F)?


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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5667662 - 02/07/13 06:55 PM

With an alt-az camera tripod?

For star trails, ISO about two settings below max, aperture at about f/4, and shoot the longest you can.

Of the moon, SHORT (1/100?).


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lamplight
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Reged: 09/18/12

Loc: western MA, U.S.
Re: Bought scope and mount - now need eyepieces new [Re: Thomas Karpf]
      #5667674 - 02/07/13 07:06 PM

Moon:

I do 1/1000 if I can or 1/500 but that's at f/1.7 that's when I started getting sharper pics. They would appear properly exposed but the speed helps the blur (this all non tracking mount)

Basically I've found ,do it as fast as you can cause its /we are moving faster than you think . Def timed or remote shutter release!

I haven't had a good star trails shot yet but was trying the smallest aperture I could get and as long as I could expose before overexposure.. Was doing 2-3 minutes... But I'm still learning so this is not advise I recently saw a great pro one and it was a composite of multiple short(ish) which seems a good idea to try.. Perhaps multiple exposure of the same frame! (?)


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FTLAUDSKY
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Reged: 01/21/13

Re: Bought scope and mount - now need eyepieces new [Re: lamplight]
      #5668032 - 02/07/13 10:52 PM Attachment (6 downloads)

Well I'm back. Clouds rolled in early and setup anyways. This is that first time with scope and laptop. Wish I could have gotten the shot clear, but I got Orion's nebula. It was high in the sky and tripod is horrible. I know its out of focus, but best I could do with no live view. Ended up trying out the new cheap EP's. Zoomed over to Jupiter and bam...tried the 4mm plossl and was able to get it to focus and saw Jupiter and all the moons. Amazing!! Saw like 2-3 bands. That big boy is super bright. It kept moving out of the FOV and I eventually gave up after a more few times. I can not wait to get my mount and the new EP's. Anyways although the AP was a disaster I am still happy I tried. Just need to get it focused better next time. I'm going to include a picture even though it horrible, but gotta start somewhere. Thank you all for your advice I really appreciate it!! I plan to make you proud in a few weeks weather permitting.

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WaterMasterAdministrator
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Reged: 02/17/10

Loc: Southeast Idaho, USA
Re: Bought scope and mount - now need eyepieces new [Re: FTLAUDSKY]
      #5668066 - 02/07/13 11:06 PM

Cool. A Bahtinov mask helps with the focus problem. It also appears you have a little movement in the star field, so a shorter exposure would help that.

'A journey of 1000 miles...'


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FTLAUDSKY
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Reged: 01/21/13

Re: Bought scope and mount - now need eyepieces new [Re: WaterMaster]
      #5669468 - 02/08/13 05:28 PM

Quick question - So I got a field flattner with my GT81 scope. I used this to screw into the T adapter on my camera. I can focus with that setup. I just picked up a 2" barlow 2X. Man is it beefy - anyways when I slide in the flattner into the barlow I can't focus anymore. I know they make extension tubes, but where does it get added? The extension tube would need another adapter to screw into the Filter threads. How is this done? What order should it be in? Ex - Camera - T Ring - Field Flatterner - Extenion tube - Barlow - Focuser? I figure if I wanted to take pictures of Jupiter I would need more magnification since I have a short scope. Any insight?

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