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Topics - olexecin

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I had always been under the impression that the extra resolving power of increased aperture only manifests once you start increasing magnification, but the other night I was comparing the 3rd quarter moon in my 8" SCT with my 12" dob, and even at the same magnification, the 12" dob was showing enormous amounts of detail and texture that was just invisible in the 8" (despite better optics in the 8"). In neither case was I pushing magnification to either scope's limits. Seeing was good, but not great.

Is that normal or were my eyes just playing tricks on me?

Hey everyone,

So a couple days ago, I found my first ever DSO: M13. I haven't had my equipment for too long and haven't put much effort in DSOs so far, mainly due to the lack of a good finderscope/telrad (which I'm anxiously awaiting by the end of this week!), but now I'm hooked and will be looking for more!

90% of my viewing is from the backyard in a red zone, so not the best for DSOs, but I'll be extremely motivated to do the 45min drive to the nearest yellow/green zone more often.

Anyways, it was a pretty nice and rewarding feeling finding the faint M13 for the first time, and practicing averted vision, which brought up a bunch of little stars around the faint smudge of the cluster!

So that was using my Vixen 70mm refreactor and a 25mm Plossl.

I immediately thought, wow, if I can see this object with the 70mm, it will be much brighter with the 130mm reflector, so I quickly switched OTAs on the mount and finally spot M13 with the reflector....... hmm, pretty much the same faint smudge as with the 70mm...

So my question is, is it safe to assume that in a sky polluted area, larger apperture doesn't mean brighter objects that are pretty faint in the first place?
I guess the aperture difference will make a big difference in dark skies, but in a bad sky, will not help much if at all?

For what its worth, the refractor is a 70mm f/13 and the reflector a 130mm f/7, same eyepiece used on both.I'm leaving this Saturday morning for a 6 days/nights fishing trip in a "dark grey area" and the weather forecasts so far are looking very good.... I can't wait for doing some DSO observation in a real pitch black sky!!!!

Light Pollution Topics / BBC article on "LED wars" in USA
« on: December 30, 2017, 10:49:57 AM »

After reading this I see that we have a lot to do to get the correct info out there.

Beginners Forum / Help! Please suggest a GOOD AZ mount for a 4" Refractor .
« on: December 30, 2017, 03:02:45 AM »
A few weeks ago, I got my first scope since High School, which was 40 years ago. I'm a college history professor (history of science was one of my fields) on the cusp of retirement and I want to get back into astronomy. I'm still researching an ultimate scope (8-12 inch) but didn't want to wait, so I got a 102mm (f/6 I think) Meade Infinity for grab and go. It's a great scope for the money. The problem is the mount and tripod. The system jumps around like a bucking bronco every time I touch it. It's hard to focus because I don't know whether my object is focused because the image is jumping wildly. Same with the slow motion controls.

Can anyone recommend a good fluid but solid AZ mount, preferably with slow motion controls, and a tripod that's rock solid (at least compared to what I now have). Scope is a little over 12 pounds. I'd like to keep the mount and tripod under $250, but I'll go higher if I have to. I love the scope and want to do it justice.

Many thanks!


ATM, Optics and DIY Forum / Dobsonian binocular observing chair
« on: December 29, 2017, 12:35:12 AM »
When I was researching to build a binocular observing chair I found that there were few designs to build upon. So I did what we all do and took a bit of this and a bit of that and came up with this. Hopefully it can be an inspiration for someone else to build upon. I wanted it to be portable, strong, light, dobsonian, made of wood and capable of being used as a regular reclining chair when at star parties and the like. I call it my Quantum Gravity Chair ..... just because. It moves smooth like butter and holds the 15x70's so stable that scanning the skies are solid and effortless. It can be pointed from 5 degrees above the horizon to zenith and locked at any angle in between.

Eyepieces Questions & Recommendations / TeleVue eyepieces
« on: December 28, 2017, 11:42:35 AM »
OK guys, I had a look at the TeleVue site and couldn't see a quick run down on this. Excuse me if this has been asked before..

but what is the difference between the different types of eyepieces that TeleVue offers?






Why would I choose One design over the other design(s)? Strengths and weaknesses of either design?

I have a 900mm f9 scope (SkyWatcher Equinox 102 APO) and a Bintel (GSO rebrand) 8" f5 Newtonian (hasn't seen first light yet).

I like both planetary and DSO observing.

Your thoughts are appreciated.



Beginners Forum / Deep sky list planning advice
« on: December 24, 2017, 07:40:04 PM »
Ok so I have been to a dark skies sites with my 8 inch inteliscope dobsonion.  I am fairly new to the hobby (two years).  Next month I will be moving into the darkest skies I have ever been around with my range.  Bortle dark skies 2-3 I think.  It's a fairly long drive from my house several hours.  So I wish to make up a list of objects and have a plan because this opportunity does come together to often.  Any information on where to start or plan wpuld greatly be appreciated.

General Astronomy & Observing / WHAT WOULD YOU DO SUGGESTIONS NEEDED
« on: December 23, 2017, 11:51:49 PM »
I've been in astronomy for quite awhile now.  Due to back and hip problems I have had to sell all of my astro gear.  I've Had reflectors, refractors and
SCTs and age is also a factor.  I've a real good place in my backyard to observe.  I've 2??1/2 acres no neighbors in 800 feet and a cement slab
Surrounded by a tarp enclosure of 20 foot square.  I want to find something light weight I know I can handle.  I am looking at a set of Oberwerk
25 X 100mm binoculars and a Meade Infinity 102mm refractor.  I love to look in Galaxies, Nebulas, Open and globular clusters, and DSO observing.
I'm not into planets that much.These to things are within my budget and require no ability to utilize.  I would like to have opinions on these two things as how they compete against each other for your kind on viewing I love to perform.  I know that its a loaded question that your thoughts greatly appreciated.  Thanks


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