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Topics - lolusthoumin

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Just like the topic says. I am not sure how these work. And because I am not sure how these work, I don't know if it is possible to get a universal focal reducer for a telescope with a 2" focusser. Can someone help?

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ATM, Optics and DIY Forum / How to support an optical window?
« on: December 29, 2017, 09:49:22 PM »
For my 8" f7 newt project I'm planning to make use of an optical window, but I'm not sure how exactly to support it in the UTA, how is it traditionally done? When you collimate the secondary in an optical window do you just collimate the secondary by tilting only the secondary? Or do you tilt the whole optical window assembly? What is a good resource for learning how to make an optical window?

Thanks,

Kerman

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ATM, Optics and DIY Forum / questions about building an equatorial platform
« on: December 28, 2017, 09:00:28 PM »
I'm interested in building an equatorial tracking platform for my 10 inch Zhumell dobsonian. I've read article after article and thread after thread here on CN and while I have a better understanding of the basics than I did before, I still have more questions than answers. All of the articles detailing eq platform construction that I've seen so far either skip steps, make assumptions, or both. I'd like to ask a couple of questions along and along in hopes that I can finally get my head wrapped around this whole eq platform thing.

What I know so far is that the design of the platform must be based on my observing latitude. I also know that either circle segments or vertical north segments can be used for the sector bearings. It is my understanding that the circle segments are easier to make because their dimensions are easier to calculate but the vertical north segments make better contact with the drive motors/bearings because they contact them at 90 degree angle, producing more downward force on them thus reducing slipping. I also know that the center of gravity of the scope and platform must be taken into account but I'm not sure how yet. So without further ado:

We'll start with the length and width of the eq platform. How do I calculate these two dimensions? My latitude is 30.07 degrees.

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Mounts Questions & Expirience / CGX, Star Sense and Skysync
« on: December 28, 2017, 04:52:14 AM »
Do I connect Star Sense to Aux1 or Aux2 on the CGX? Will Star Sense HC work with it connect to the port on the bottom of Skysync?

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So i picked up a 120ed used that came with all included accessories and have had it for about 3 weeks now. I noticed it came with 2 eyepieces, a 5mm and 20mm. Just tried them out the other night, the 20 performed quite well but i still prefer my TV 20 Plossl. However, the 5mm? That thing was a little bit of a sleeper hit, it really did good i was very surprised and the seeing allowed it to shine, i dont think ive ever seen Jupiter looks so good at 180X. The 20 ill probably sell off, but im definitely keeping that 5mm.

Eye relief and comfort were both very good as well, eye placement was not critical and colors really did seem to show more on that planet. Anyway, i was very impressed and for those with the same scope, see if you get the same results.

Clear sky's

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General Astronomy & Observing / Canadian Telescopes appears to have folded
« on: December 26, 2017, 11:25:03 PM »
It's a Miserable day in Canada. There are apparently many folks who've paid for gear but are currently getting no response to their mails.
Their Facebook page has also reportedly been wiped.  And just in time for Christmas...

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Mounts Questions & Expirience / CGX Mount with 1400 EdgeHD
« on: December 24, 2017, 01:53:22 PM »
I am contemplating upgrading from my 1100 EdgeHD into a 1400 EdgeHD.  According to Celestron, the CGX mount is rated All of the way up into the 55 lb weight limit for "the top directing performance" in this video at the 2:53 mark:

https://www.youtube....B4kFmDFs&t=191s

I know usually the rule of thumb is like 2/3 or 3/4 of the weight limit; occasionally in 1/2 by a few.  I also know they're coming out using the CGX-L, but is a lot more expensive and heavier.  I do take my set-up in the area sometimes.

Someone posted a video on YouTube with the CGX using a C14 loaded with a lot more equipment and weight, but had been using a Hyperstar at f/2.2, which I am sure is Much More forgiving:

https://www.youtube....eature=youtu.be

My primary use would be doing AP work for planetary and quite modest DSO work with an OAG with no reducer using the native f/11.  I've had good success with my 1100 EdgeHD in my CGEM for this:

BbcodeImage-js (don't eliminate or edit this label)
Someone at Highpoint Scientific said I should be fine, but find it fascinating they do not offer a 1400 EdgeHD package with a CGX mount.  They used to using the CGEM DX mount, which was actually rated for 5 lbs less than the CGX.
If that is not doable, I'd probably just stick with my 1100 EdgeHD and CGEM set-up, as it appears to perform very well and is portable.  Any input would be good.  Anyone running a CGX mount using a 14" SCT with no reducer or Hyperstar would be even better knowledge.  Thanks in advance.


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