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Posts Made By: John Holt

October 5, 2008 09:07 PM Forum: Politics

Anyone else think Gov. Palin has overplayed the

Posted By John Holt

My wife feels the same way about Palin.

October 11, 2008 04:07 PM Forum: Beginning Astronomy?

What would you buy?

Posted By John Holt

Ted Judah said:

Hi every one. I am new here and would love some opinions.

Quick story: I have been granted permission to build a 11' x 15 ' observatory in a dark sky location 15 minutes from my home. It will have a pier on which to mount a scope.

After the observatory is complete. I will have approx. $2800 to buy a scope (or scopes).

I have a daughter and also lots of nieces and nephews that would love to have star parties and look through a "big" scope. So I am thinking a $1000 12" dobsonian for the "wow" views and simplicity for the kids.

I would like to try my hand at astrophotography so with the remaining $1800 I am thinking of a used schmidt-cassagrain to mount on the pier.

Or possibly just get the dobsonian and then wait and save for a dream scope later.

What would you do in my situation?


Yes to the site for use.
Yes to the pier.
Yes to the 12" newt.
Yes to any and all additional scopes. : )

Pass on an observatory structure/building itself.


October 20, 2008 08:29 AM Forum: Politics

Is it time for Atlas to Shrug?

Posted By John Holt

David Wagner said:

So, here we are in 2008, with a demonstrable (and proud of it) socialist apparently about to win the US presidency, touting his "tax the rich to fight for the poor and middle class". The only alternative being an economically illiterate, aged Republican in Name Only... And either way, a congress dominated by socialists (in both parties).

Our reality:

The top 1% of earners already pay 38% of all federal taxes
The top 5% of earners already pay 59% of all federal taxes
Almost 50% of all workers pay NO federal taxes...

The cycle is obvious, the trends inevitable. Socialism at the point of a gun is already here, and getting worse.

Obama proudly claims he'll give even more in "tax credits" back to the "poor and middle class"; this will most certainly result in a situation where less than half the earners are paying ALL the taxes.

Is it time for those of us who actually work, earn, create companies, products and services... and who are continually taken advantage of, continually and increasingly taxed (at the point of the government gun)...

to simply say: "you are right, being rich is evil, earning money is evil, so we quit, we earn no more, we employ no more..."

and quit playing their game?

What say YOU, Astromarters?


Or simply say nothing at all. That sounds best to me. Fade away if need be. But quietly, please.

November 9, 2008 06:56 AM Forum: Equipment Talk

c8 vs 8" dob

Posted By John Holt

victor truglio said:

if you could only have one, would you rather have a gem mounted f10-c8, no goto, or an f6-8" dob, no goto.
both with good mirrors.
the scope would be used for a little of all types of observing.
no photography.


My vote is an alt-az mount, either type ota.
Neither will work well if not cooled and collimated.

November 27, 2008 07:34 PM Forum: Eyepieces

For suburbs.what mm eyepiece works best?

Posted By John Holt

mike selz said:

Looking to maximize my eyepieces to see the deeest dark sky objects possible through an 8" Hardon Dob...i noticed where i live i could see more with my 20mm 300 series plossl...fainter stars...than with my 30mm agena astro SUperview EP, big wide view but background is a bit lighter (i was looking closer to down...5:40am)...the 20mm has a 3 exit pupil...the 30mm a 5 exit pupil about...where i live i doubt it's of use to go higher than a 2 or 3 light pupil, due to all the light polution (ivan would know about this 1..lol), wouldnt u say? i live in coconut creek...near boca raton in south florida.

Any opinions would be greatly appreciated.
thanks!



Yes, some what higher power works better than lowest power.
A powered finder scope can put one right on target, better than a finder eyepiece. Then observe the target with more magnification.
Most visual deep sky targets are small. Wide field is keano, but not a necessity. Plossl's are generally high throughput and do well if their eye relief (usually 75% of their focal length) is workable.

Also protect dark adaptation at the ep. With a drape over the head, or strategically placed screens (of any kind) around the scope, positioned to block intrusive lighting.

December 24, 2008 12:45 AM Forum: Equipment Talk

Celestron C8-SGT vs Meade LDX75 8" SCT?

Posted By John Holt

I have little interest in imaging (maybe playing with a webcam, no more), just viewing.

Thanks in advance for any and all input.

Tom Duncan/newbie





http://www.buytelescopes.com/product.aspx?p_id=12501&store_id=2&did=1

December 27, 2008 03:40 PM Forum: SCI-FI

This Island Earth, the novel

Posted By John Holt

Thanks for the heads up! I enjoy the film.



...read the novel, and it is superior in many ways, far more detailed, quite different from the flick, and is frankly a whole new experience.


This is true for a couple of John Wyndham novels as well. Day of Triffids and The Midwhich Cookoos. The latter was titled Village of the Damned, and had some pretty bad sequel(s). Both books were different, and significantly better than the films IMHO.

December 30, 2008 01:44 PM Forum: Eyepieces

8.4mm - 8.7mm ?

Posted By John Holt

bill huber said:

Did anyone make EPs in these fl:
8.4, 8.5, 8.6 & 8.7mm
I have seen the big 8.8mm by Meade.
Between 9mm-10mm, I have seen Meade 9.5mm 3000 & 9.7mm 4000
Between 6mm-7mm, Meade has a 6.7mm / 6.4mm & UO had a 6.5mm
It just seems like there is not much available between 8mm to 9mm?



Siebert offers an 8.8 for focal ratios f/6 and slower. And I'd bet you could talk to Harry about building one to your spec's. Very good folks to deal with at Siebert Optics.

Most ep's simplifiy the published sizes to whole numbers for marketing purposes. Exact published milli-metric mirror focal lengths can vary anyway, so exact precisely perfect magnifications are really only approximations.

A zoom ep could do the job of tweaking magnification to the max for the given seeing conditions.

January 1, 2009 02:54 PM Forum: Deep Sky Observing

How to observe

Posted By John Holt

Burnhams' seems like a good place to start from. His abbreviative code itself focuses what to look for, and perhaps in what order.

January 4, 2009 02:20 PM Forum: Eyepieces

TeleVue Plossl Eye Relief

Posted By John Holt

Do these ep's have rubber at the top? I've found this to a must for me for eyeglasses at the eyepiece.