Canon 93517 - Manual (Page 10)

10
Barlow lenses offer an easy, economical way to
increase the magnification range of your eyepieces,
and Celestron carries an assortment of these highly
useful lenses. A Barlow lens doubles the magnifying
power of your eyepiece by doubling its effective focal
length. For example, an 18mm eyepiece used with a
2x Barlow lens would have the magnifying power of
a 9mm eyepiece. It’s like having two eyepieces in
one!
If you’re looking for an affordable way to achieve
high-power viewing of the moon and planets, double
stars and even close-up views of terrestrial subjects, a
Barlow lens is the answer.
Barlow lenses mount into either your telescope’s focuser or visual back.
The Economy models of .96" and 1 1 /
4
" are good choices when you want to
expand your power ranges at a very economical price.
Celestron’s premium quality .96" and 1 1 /
4
" achromatic Barlow lenses (#93502
and #93507) are compact and lightweight. Both are under three inches long,
with the 1
1 /
4
" lens weighing in at 4 ounces and the .96" lens a mere 2 ounces!
The clear aperture is 27mm on the 1 1 /
4
" model, and 21mm on the .96" unit.
The .96" Barlow is fully multicoated and the 1 1 /
4
" lens is multicoated.
The Ultima ® Series Barlow (2x – 1 1 /
4
") is an air-spaced, three element apochro-
matic design with a 27mm clear aperture. This lens features a very high
quality, fully multicoated design. Amazingly compact and lightweight, it’s
just 5 ounces and 2.75" in length.
2x Barlow Lens – Economy – .96" [93211]
2x Barlow Lens – Economy – 1 1 /
4
" [93213]
2x Barlow Lens – Deluxe – .96" [93502]
2x Barlow Lens – Deluxe – 1 1 /
4
" [93507]
2x Barlow Lens – Ultima ® Series - 1 1 /
4
"
[93506]
Top: #93506, 93502, #93507
Bottom: #93213, #93211
Eyepiece
Focuser or
Visual Back
Barlow Lens
Option:
Diagonal
B
ARLOW
L
ENSES