Celestron C4.5 User Manual

OPTIONAL ACCESSORIES
The following is a list of optional accessories that can be used with your
Celestron C4.5 Newtonian telescope. All the accessories are listed in alpha-
betical order. For a complete description of all accessories, ask for the
CelestronAccessory Catalog (93685).
Accessory Case (#93500) - This rugged ABS plastic case is designed for
carrying a few accessories. Inside is a foam padding that is die cut to 1x1
inch squares. These squares can be removed to accommodate the accessories
and eyepieces with a custom fit.
Barlow Lenses - A Barlow lens is a negative lens that increases the focal
length of a telescope. Used with any eyepiece, it doubles the magnification
of that eyepiece. Celestron offers two Barlow lens in the 1-1/4" size for the
C4.5 The 2x Ultima Barlow (#93506) is a compact triplet design that is
multicoated for maximum light transmission and parfocal when used with
the Ultima eyepieces. It works very well with all Celestron eyepieces. The
latest Barlow to be added to Celestron’s product line (#93507) is a low profile
achromatic design. It weighs just 4 oz. and it under 3” in length.
Collimation Tool (#94183) - A valuable aid to assist you in collimating your
Newtonian telescope. A simple tool and detailed instructions are included.
Eyepieces - Like telescopes, eyepieces come in a variety of designs. Each
design has its own advantages and disadvantages. For the 1-1/4" barrel
diameter there are four different eyepiece designs available.
* SMA - The SMA design is an improved version of the Kellner eyepiece.
SMA's are very good, economical, general purpose eyepieces. Available
in focal lengths of 6mm,10mm, 12mm, and 25mm.
* Plóss! - Plóssl eyepieces have a 4-element lens designed for low-to-high
power observing. The Plóssls offer razor sharp views across the entire
field, even at the edges! In the 1-1/4" barrel diameter, they are available
in the following focal lengths: 6.3mm, 7.5mm, 10mm, 12.5mm, 17mm,
20mm, 26mm, 32mm and 40mm.
* Ultima - Ultima is not really a design, but a trade name for our 5-
element, wide field eyepieces. In the 1-1/4" barrel diameter, they are
available in the following focal lengths: 5mm, 7.5mm, 12.5mm, 18mm,
24mm, 30mm, 35mm, and 42mm. These eyepieces are all parfocal.
* Lanthanum Eyepieces (LV Series) - Lanthanum is a unique rare earth
glass used in one of the field lenses of this new eyepiece. The Lantha-
num glass reduces aberrations to a minimum. All are fully multicoated
and have an astounding 20mm of eye relief — perfect for eyeglass
wearers! In the 1-1/4" barrel diameter, they are available in the follow-
Optional Accessories + 49

Celestron C4.5 Specifications

General

Brand	Celestron
Model	C4.5
Category	Telescope
Language	English