Why This Page?
The C5, C5+, G5, and NexStar-5/5i, from Celestron, are different mounting
configurations for the same 5” (127-mm) diameter, f/10, Schmidt-Cassegrain
telescope!Whether advertised as a
spotting scope/telephoto lens, portable observatory, or computerized "Go
To" telescope, the optical specifications and general tube mechanics are the same.The convenient size of the telescope makes it a great pick for a variety
of observing needs: from casual observing, to piggy-back photography, to
yielding excellent image-size in prime-focus photos of the Sun and Moon. This highly portable telescope has been used on Space
Shuttle missions and recently did "real" science by imaging Leonid
meteor impacts on the Moon!
Answers to Your Questions
The goal of this
site is to gather information, to increase the usability of the 5” series of
Celestron telescopes.Several main sections here serve to make this information conveniently accessible:
The
Highlights column to the right contains up-to-the-minute news and information for
Celestron 5" SCT enthusiasts.
The
Quick Specs section has notes on the optical setup of the
Celestron 5" SCT.
The
Info-5
Links are your gateway to reviews and technical material.
Learn
new techniques by examining Images
taken through the 5" SCT series.
Visit
other great sites
dedicated to the your favorite small SCT.
Participate
If you have question or comments, visit
the (no
registration required!) Message Board.This is the meeting ground for user-to-user discussions.Post messages with your tips, experiences, and read what others are saying.Ask for advice.
E-mail
me links to or attachments of images, taken through or guided by your
5" Celestron. Non-astronomy photos welcome -- after all -- these
instruments are 1250-mm telephoto lenses! Include exposure, and manipulation
data so that we can all learn.
Have
an interesting Celestron 5" SCT setup? I'll feature it in the Celestron 5" SCTs Around the
World section of this page.
Have
Mods? Send links or instructions with any illustrations to the e-mail
below.
For formulas: "D" = lens diameter in mm; "L" is wavelength in mm -- 0.00055-mm for green light.
(1) Nexstar5 specs on Celestron.com. Same value derived from Sky & Telescope C5 test Oct. 1993.
(2) My test results for C5+ with included 25-mm eyepiece. For SCTs, focal
length changes with focus!
(3) Using formula: ( 4.5 + 4.4 * Log (D)). North, Gerald. S.,
'Better formula for telescopic limiting magnitudes?', The Journal of the
British Astronomical Association, Volume 107, No.2 (April, 1997), p.82
(4) Using formula: ( 206000*L/D) for arc-seconds.
K. Okano (Tokyo, Japan) presents the highly portable and potent imaging combination of a
C5 and ST-7 camera.
For film work what can beat
James Funkhouser's (Oklahoma, USA) classic single-fork C5+ paired with a classic Pentax
K-1000?
John Starr (Los Angeles, USA) must be a dedicated C5+ observer to precariously perch on his
roof like that!!
James Ellis (Sidney, Australia) employs a C5 as the heart of an
"eclipse-chasing" telescope system.
Dennis Steele (Burlingame, CA) achieves unique "goto" capability with
his NexStar-5 installed on a Celestron N114GT mount.
At
Sommers Bausch Observatory (University of Colorado) Orange-tube C5s serve as
"workhorse" scopes -- scroll down to "Celestron 5-Inch
Telescopes" section.
Fernando López
(Alicante, Spain) with a hybrid system consisting of a C5 spotter and
NexStar tripod/wedge.
Tom Nathe (Oregon, USA) displays details of his C5+ that allows for quick
setup and polar alignment.
Matthias
Bopp (Langenbrettach, Germany) owns a NexStar-5 with the nickname
"Borg". Once you see it you'll understand! Checkout the Astronomy
Downloads link for many useful articles.
Andrés
Valencia (Venezuela) imaged the Total Lunar Eclipse of April 3, 1996
with a C5+ and Olympus OM-2.
James Funkhouser's (Oklahoma, USA) Lunar eclipse photos with the C5+ and
Pentax K1000: 1996
& 1997.
John
Sussenbach (Holland) C5 Total Solar Eclipse, June 21, 2001
A perfect
project for Celestron 5" SCT users! Join
the international amateur event to view and image Pluto in small aperture
telescopes!
[Without Joining the Ring >>]
Disclaimer Note:
Any material and comments here are not reviewed or endorsed by Celestron.
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