WEDNESDAY, MARCH 30, 2016
Celestron FirstScope
Obtained this small portable telescope partly for demonstration purposes.
To show interested parties an inexpensive option for viewing the planets
and bright deep sky objects. The 3" Newtonian is very light-weight
at 2 kg.
type: dioptric / Newtonian reflector
make: Celestron
model: FirstScope (#21024)
obtained: ~2010 from Canadian Tire
technical info:
- focal length: 300mm
- aperture: 76mm (2.99")
- focal ratio: f/4 (3.95)
- minimum / maximum magnification: 11x / 180x
- mirror: spherical
sighting or finder scopes:
- none
- OTA screws for finder scope
viewing equipment:
- eyepieces
- Celestron H20mm, 1¼" (included, 15x)
- Celestron SR4mm, 1¼" (included, 75x)
- eyepiece cases
- rack-and-pinion focuser
mount type:
- single arm Dobsonian-style
mount accessories:
other accessories:
- user guide information sheet (included)
FRIDAY, JULY 27, 2012
photo gallery
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Stock photography from Celestron web site.
Good view of the support arm and the large tensioner knob on the altitude axis. |
SUNDAY, AUGUST 21, 2022
my blog posts
For quick reference, here is an index to the blog posts related to
the Celestron Firstscope 3" Newtonian. Reverse chronological
order.
- 3D-printed replacement
focus tube for Alister, 16 Mar '22
- captured
Lunar X, afocal, 20 Nov '12
- ran it beside 12"
at DDO, 8 Oct '11
- a lemon, star
test failed, 17 Oct '10
- after collimation, a little
better, 7 Oct '10
- researched eyepieces, H
and SR, 7 Oct '10
- first
light for Firstscope, 6 Oct '10
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links
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