Orion ED100

"Edward" wrote in message
link.net...

"Richard" wrote in message

I doubt you'll see Orion's people crying about the price of glass sets
and
then turn around and charge $2800 for something they can sell for under
$1000.
-Rich

Is anyone charging $2800 for a 4" ED doublet (crying or not)?

Certainly not at F9.

I doubt you'll see Orion's people crying about the price of glass sets and
then turn around and charge $2800 for something they can sell for under
$1000.
-Rich

Hey Rich,

Since it's so easy, why don't you do it? According to your math, you'd make
a fortune!

Clear Skies

Chuck Taylor
Do you observe the moon?
Try http://groups.yahoo.com/group/lunar-observing/
And the Lunar Picture of the Day http://www.lpod.org/
************************************

Yikes! F/9? I'm thinking to myself ... "well, what's the point?"

The Skyquest 4.5" reflector is f/8...

But it's on Orion's web site as of 8-9-04 10:00pm CDT.

"Edward" wrote in message
news
F/9, $999. This week, maybe.

Ed T.

http://groups.yahoo.com/group/Orion_ED/message/2365

http://starizona.com/telescopes/show...No=9975&Show=1

"Astrosetz" wrote in message
...
Yikes! F/9? I'm thinking to myself ... "well, what's the point?"

I'm not just thinking it, I'm discussing it.

What is the point?

"Stephen Paul" wrote in message
...
"Astrosetz" wrote in message
...
Yikes! F/9? I'm thinking to myself ... "well, what's the point?"

I'm not just thinking it, I'm discussing it.

What is the point?

Ever use an f/15 4" refractor? I did. As an achromat, the color correction
was somewhat acceptable at that length, but I still used an MV for the moon.
And f/15 takes a lot more mount than f/9 (and this should give much better
color correction.

Clear Skies

Chuck Taylor
Do you observe the moon?
Try http://groups.yahoo.com/group/lunar-observing/
And the Lunar Picture of the Day http://www.lpod.org/
************************************

"CLT" not@thisaddress wrote in message
...
"Stephen Paul" wrote in message
...
"Astrosetz" wrote in message
...
Yikes! F/9? I'm thinking to myself ... "well, what's the point?"

I'm not just thinking it, I'm discussing it.

What is the point?

Ever use an f/15 4" refractor? I did. As an achromat, the color correction
was somewhat acceptable at that length, but I still used an MV for the
moon.
And f/15 takes a lot more mount than f/9 (and this should give much
better
color correction.


"No" to your question. And "not sure why I should care" to your explanation.
A 100mm F9 refractor still requires more mount than a 100mm F5 (or F6), or a
6" F8 Dob, or (god forbid) a 4" F10.5 Off Axis Newt/Dob.

I guess that's my quandry. I don't understand why someone would want a long
focus refractor (anything over 600mm), unless it were in the 6" or larger
aperture range, on a pier, in an observatory.

I just don't see where a 4" F9 fits in. I've drooled over the TV101, but the
TV102 has never even sparked the least interest for me. If I was interested
in a longer focus 4" scope, I'd prefer the Dob mounted Off Axis Newt,
because it's Dob mounted. Barring that option, I'd go for a 6" F8 Dob and an
inexpensive equatorial platform drive (if one at all).

Is this one of those, "you have to look through it to understand" things?

Stephen

"Stephen Paul" wrote in message
...
"No" to your question. And "not sure why I should care" to your
explanation.
A 100mm F9 refractor still requires more mount than a 100mm F5 (or F6), or
a
6" F8 Dob, or (god forbid) a 4" F10.5 Off Axis Newt/Dob.

I guess that's my quandry. I don't understand why someone would want a
long
focus refractor (anything over 600mm), unless it were in the 6" or larger
aperture range, on a pier, in an observatory.

I've discussed this with a lot with a friend whose tried a bunch of thngs,
and although I've seen one, but haven't got a chance to look through one
yet, a good 5" unobstructed scope sounds like a good border line. Since
I've only done the jump from 4 to 6 personally I'm with you. 6" or better
is a good place to be.


I just don't see where a 4" F9 fits in. I've drooled over the TV101, but
the
TV102 has never even sparked the least interest for me. If I was
interested
in a longer focus 4" scope, I'd prefer the Dob mounted Off Axis Newt,
because it's Dob mounted. Barring that option, I'd go for a 6" F8 Dob and
an
inexpensive equatorial platform drive (if one at all).


I think the 6" f/8 dob is one of the best starter scopes. It does quite a
few things well at a really cheap price. You can get really good views of
the planets and you can see all the popular targets (messiers, brighter
NGCs, split doubles etc) without too much trouble. The scope is reasonably
portable and doesn't require a lot of setup. The only real downside for
beginners is learning collimation.

Mike.

Stephen,

"No" to your question. And "not sure why I should care" to your explanation.
A 100mm F9 refractor still requires more mount than a 100mm F5 (or F6), or a
6" F8 Dob, or (god forbid) a 4" F10.5 Off Axis Newt/Dob.

Yes, I agree. I've had my 6" f/8 Dob side by side with a TV102 and a
Tak 102 and it beat them both on Saturn (too close to call on
Jupiter), and on ease of set-up, but both were on EQ mounts. I could
use the TV102 on my Bogen 3036/Telepod set-up, but the Tak's a good
bit bigger. If I were going for a 4" apo, it'd be the NP101, which
would work well on both of my mounting options. As it is, I'm well
covered with my TV85 and Dob. What I really should do is get an 8"
f/7 to go along with the TV85, but I have to traverse stairs to get to
my rooftop.

Clyde

"Astrosetz" wrote in message ...
Yikes! F/9? I'm thinking to myself ... "well, what's the point?"

The Skyquest 4.5" reflector is f/8...

But it's a reflector. F9 is still reasonable for a refractor.
Remember, 30 years ago most were F15.
-Rich

That's true. I know that an 4" f/9 refractor is nicer than a 4" f/15
refractor.

I'm just not sure what a 4" f/9 refractor gets you over a 4.5" f/8
reflector.

I understand the appeal of small and short f/ratio refractors. I have a
TV-85 that is a totally different instrument than my Newts. But I'm
wondering what a 4" f/9 refractor brings to the table.

-Astrosetz
www.astrosetz.com
www.ncsf.info

"Richard" wrote in message
om...
"Astrosetz" wrote in message
...
Yikes! F/9? I'm thinking to myself ... "well, what's the point?"

The Skyquest 4.5" reflector is f/8...

But it's a reflector. F9 is still reasonable for a refractor.
Remember, 30 years ago most were F15.
-Rich