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Posts Made By: David Simper

June 26, 2003 03:57 AM Forum: Equipment Talk

Orion Mak vs. Stellarvue refractor

Posted By David Simper
Josh,

having experience with Apex 127, SV 102EDT and MK-67, I would say think SV4" EDT or Vixen102ED vs MK-67. Both MK-67 and EDT are airline portable, I am not sure about 102D and Vixen is too long.
It really depends on your viewing preferences - the narrow field Maks more for planetary, doubles, the 4" semi-apos more universal.

David

July 17, 2003 10:28 PM Forum: Telescope Making

Airline portable design questions: 11"

Posted By David Simper
William,

you mentioned the StarMaster 11 ELT. There was some discussion lately on SM group that some time ago, Rick considered to produce airline portable 11" Starmaster but put the idea aside due to lack of interest. Several people in the discussion revealed interest in such scope. Maybe Rick needs a public "push" to move in this direction.

To answer your question re: low profile mirror cell, have alook here;

http://www201.pair.com/resource/astro.html/regular/products/cpt/cell.html

David

July 23, 2003 04:30 AM Forum: Telescope Making

Siliconed Mirror

Posted By David Simper
You may try also a flossing line to get underneath the mirror.

David

August 11, 2003 03:04 AM Forum: Telescope Making

Opinions on Ronchi images of 12.5" F3.8, Please

Posted By David Simper
Preston,

you may consider to join
http://groups.yahoo.com/group/zambutomirrorgroup/
There has been a lot of discussion re: mirror testing lately. You would get expert advice.

David

August 16, 2003 03:57 AM Forum: Equipment Talk

Some MV Filter Question (MV+color?)

Posted By David Simper
Vlad,

get the Celestron Contrast Booster filter (the same product as Baader Contrast Booster). It is affordabe $39-43 and will serve your scope well - AR-6 has a significant color error - the blue chanel is just a mush. Get a second 2"->1.25" adapter and keep the filter on it for higher power views (supposedly with 1.25" eyepieces), where the color error would be most annoying.

David

September 1, 2003 04:08 AM Forum: Equipment Talk

Fans blowing across mirror

Posted By David Simper
Check
http://groups.yahoo.com/group/Dob-fans

David

September 29, 2003 02:08 AM Forum: Equipment Talk

NPC1problems, not very happy!

Posted By David Simper
Jim,

I feel sory for your disappointment but there is a silver lining to it:
there is a 2" version of your Celestron filter. Baader makes them for Celestron and you can order them for $79 from the US dealer:
http://www.alpineastro.com/filters/filters.htm
Note in the description:
"While some dielectric filters may degrade just from exposure to moisture or occasional cleaning, Baader filters withstand repeated real-world exposure to the elements and physical cleaning."
The Baader is more agressive in suppresion of the violet than NPC1 which theoretically makes color shift to yellow but people differed in reports how much this bothered them.

David

October 3, 2003 04:28 PM Forum: Equipment Talk

Newt Fans

Posted By David Simper
The topic of using fans for thermal management is in general discussed also on
http://groups.yahoo.com/group/Dob-fans

David

October 5, 2003 08:00 PM Forum: Equipment Talk

Wanted: New product

Posted By David Simper
I am sure Neil would adapt the 6" for longer f.l.
http://www.starbuckets.com/telescopes.html

David

October 21, 2003 05:12 PM Forum: Equipment Talk

Re: Should I consider this for my husband?

Posted By David Simper
>>Astromart is a VERY SAFE place to find what you need<<

I am sure that many here when read your post thought: "Pitty that she is engaged already..."

David

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