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Topics - blacosticna

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Just a question that came to me. Thanks for any answers!

ATM, Optics and DIY Forum / Lyot tester
« on: December 30, 2017, 11:00:52 AM »
Hi, I've been wanting to set one of these up for some time but I cannot find what is needed just a lot of people saying it's easy or as easy as a foucault test but yet I cannot find on the net or this forum a nice simple explanation of what's needed?

Can someone very nicely make a drawing for a simple minded guy like myself of what is needed.


Reflectors Telescopes Forum / Orion UK VX6L - experiences?
« on: December 29, 2017, 10:00:59 PM »
I caught the "UV bug", imaging Venus with a UV-pass filter. However, I've been doing this with my C6 SCT - which, due to spherochromatism inherent in the design, has terrible overcorrection at UV wavelengths, and thus degraded image quality.

I'm pondering getting a small (6") all-mirror planetary scope, mostly for imaging.

I ran across the Orion UK VX6L OTA, which seems like it would fit nicely:


Anyone have any experiences with this scope? Optics? Mechanicals? Finish?I have an Orion Astroview EQ-3 mount with upgraded wood legs, so I think it could handle 15 pounds, at least for planetary imaging.

Beginners Forum / Deciding between a laser collimator or a light filter
« on: December 29, 2017, 06:00:38 AM »
Hi all,

 I am currently thinking of buying a telescope, that is the Skywatcher Heritage 130P, or as it is better known in the US, the AWB Onesky 130. I live in a highly light-polluted city (Bortle8-9) with some occasional opportunities to travel to less light-polluted places (Bortle 5-6). I am choosing between 2 different accessories now due to budget constraint, one being an OEM Laser Collimator for Newtonians, and another being the Optolong Moon and Skyglow Filter. Both are of roughly similar prices in the bundle that the retailer is providing, about US$40.
More specifically, I would like to ask 2 main questions:
1. How is the filter rated? Will it show a good result in filtering out unwanted light and improving contrast of planets and brighter DSOs? How does moon viewing rack up against a standard ND moon filter?
2. Will collimating the telescope be much more difficult and tedious without the laser collimator?
What do you guys think? Please do leave some experiences from using these accessories and if possible, specifically on the scope. Thank you all in advance and clear skies!


Skywatcher Heritage 130P:
(This is the scope, but I am not buying from this retailer.)

Mounts Questions & Expirience / ioptron cem120 Mount is imminent
« on: December 28, 2017, 03:32:03 AM »
The new ioptron cem120 looks beautiful. Ioptron certainly have covered all possible connection ideas
I look forward to this one

Sent from my iPhone using Tapatalk

ATM, Optics and DIY Forum / Prisms and under correction
« on: December 24, 2017, 08:39:03 PM »
Here's a question for you optic gurus.  Does a prism or prisms induce under correction in a refractor generally?  Am asking because I simply started binoviewer seeing with a WO binoviewer using my 6" f12 achromat.  Really like this it reduces perceived CA with a bunch, but when star testing appears to increase under correction in a scope that currently shows some in mono directly thru manner.

Is is this normal when you have a lot of prisms from the optical path ( binoviewer plus prism diagonal).

Or is it just these prisms, not best quality?


Reflectors Telescopes Forum / new moon's rotating truss ring
« on: December 24, 2017, 03:01:06 PM »
link to fb

20f3 something

Intriguing, so instead trying to simply rotate the uta, rotate the entire truss. . .can rotate max 80??


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