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Topics - Abdullahi Archer

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

Think its was worth just under a grand? I left the 2 counterweights on the table, so they aren't in the picture.

Good Morning All,

I received my C90 and am impressed so far with it for Grab and Go Purposes for Land and Sky viewing. I am now wondering if there are any benefits(image quality) to be realized by upgrading to a set of different diagonals for Land and Sky use.

If so, can you recommend some models of diagonals to consider?

Thanks in Advance!


General Astronomy & Observing / Alabama Summer Vacation
« on: December 30, 2017, 07:40:16 AM »
So this summer I'm going to be staying in a beachfront house on the Alabama gulf coast, about 40 miles from the center of Mobile, with family. I'm probably going to be bringing my 8" LX90 with me, anyone else in that area other than good ol' Uncle Rod(whose SCT documentation has been amazingly helpful)?

Eyepieces Questions & Recommendations / Show me your eyepiece case layout!
« on: December 29, 2017, 05:23:32 AM »
I'm making a new eyepiece case and would love to see how people configure their layout.

I have a modest collection right now but, want room to grow.
My target: space for 12 1.25" and 6 2" eyepieces ... with extra room for odds and ends.

ATM, Optics and DIY Forum / Home made Dob base.
« on: December 29, 2017, 02:46:17 AM »
OK I have an XT8 on the standard Orion Dob mount.
What are the benefits of building a new one.
I have my BB plywood.
Is itstrength, better control or lighter weight?(with cut outs)
Just asking before I start this.

Reflectors Telescopes Forum / Lightbridge Collimation Problem
« on: December 28, 2017, 11:21:28 PM »
I'm looking for guidance on a collimation problem. I bought a 12" Lightbridge dob from a man who was downsizing his telescope collection, and said he could never get it to collimate.

I upgraded the primary springs with a set from Bob's Knobs, and thought I found the problem. One of the original springs was missing!

But, alas, I still have problems properly collimating the scope. I found this note in the user manual that may be the problem, as the secondary spider had been removed and reinstalled.

The collimation procedure for the Meade LightBridge Dobsonian is slightly different from that of other Newtonian reflecting telescopes, because of the "fast" f/5 to f/6 focal ratio of the primary mirror. In typical Newtonian reflectors with more conventional focal ratios (i.e. longer focal ratios), when the observer looks down the focuser tube (without an eyepiece in the focuser), the images of the diagonal mirror, primary mirror, focuser tube and the observer's eye appear centered relative to each other. However, with the short focal ratio primary mirror of the LightBridge Dobsonian, correct collimation requires that the diagonal mirror be offset in 2 directions: (1) away from the focuser and (2) towards the primary mirror, in equal amounts. This offset is approximately 1/8" in each direction. Note that these offsets have been performed at the factory prior to shipment of your telescope.

Has anyone run into this before? And how could I best collimate the scope while incorporating the offsets?

Thanks in advance, and clear skies!

ATM, Optics and DIY Forum / Open Tube 14" Table Top SCT
« on: December 24, 2017, 02:51:16 PM »
Hi All,

I usually save my jobs for the autumn and winter but once I received my hands on a set of optics, my ATM itch became too much to endure and it had to be scratched  Adding a import 3 axis CNC router to the mix and this retired study machinist could not hold himself back.  Wish me luck.  The chips are still flying!


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Beginners Forum / Celestron PowerSeeker 80EQ Refractor Telescope?
« on: December 24, 2017, 11:02:09 AM »
I am considering getting my son the Celestron Power Seeker 80EQ Refractor Telescope.  He has always been fascinated by the night sky.  He moved to Utah and that I thought he'd enjoy it on the market.  Is that a fantastic beginner scope or would a person get frustrated with that?  The cost is right that is for sure, and I discovered that it could be good for deep space, don't know about planets.

I bought the nexstar 8se this year and I love viewing the night skies with it.  Can not wait to bring it from town.

General Astronomy & Observing / Enhanced Vision Telescope Shown At CES
« on: December 23, 2017, 10:12:11 PM »
A prototype telescope was demonstrated at CES that changes everything.  Developed by a business in France the telescope may function as a standard telescope for visual, but envision a switch and it changes to an enhanced view that magnifies and sharpens details in addition to brings out color in DSO's.  I need you!  It is possible to read the article <a href="">here[/url]and see a upgrade picture.

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