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Click logo for more . . .
We have
taken some
of the best
elements
from our
extensive range of instruments and fused them into the CT Range.
Full specifications listed below.
We have created an instrument that will surpass any other telescope in its class.
Sporting a Carbon Fibre tube and our Ultra Grade Optics (1/10 PV waveront), CT Ultra Newtonians will astound you with their clarity and power.
Apertures available:
CT8 - 200mm f4.5
CT10 - 250mm f4.8
CT10L - 250mm f6.3
CT12 - 300mm f4
CT12L - 300mm f5.3
CT14 - 350mm f4.7
CT16 - 400mm f4
The entire range benefits from common elements so you only have to choose your preferred aperture and F Ratio.
Each model sports our superb Carbon tube, 1/10PV Wavefront Optics and HiLux coatings. 4 Vane Steel Spider, 9 Point CNC Mirror Cell, OC1 Focuser with 10:1 slo-mo reduction, 8x50 Finder.
CNC machined tube rings are supplied as shown on telescope opposite.
Also available as an optional extra are Baseplate Attachments and a choice of Dovetails. A variable speed electronic drive can also be added to the OC1 Focuser for precision focusing.
Buy this model as an Optical Tube Only (OTA) or
SCROLL DOWN FURTHER to Buy Tube and Mount as a Package from the selection below.
The CT Range has a Sandwich construction Carbon Fibre tube with a very pleasing gloss external surface and matt black internal tube surface. Offering the ultimate physical stability with virtually zero expansion for focal plane maintenance.
The rear mirror support is our 9 Point Flotation CNC machined Mirror Cell. This maintains positional acuracy and hence perfect image quality. Also at the rear, our Fan cooling system will minimise cool down times and help maintain image quality during viewing. Fan(s) can be left in continuous operation.
Our Precision OC1 Focuser with silky smooth 10:1 reduction will give precise focusing. An optional Variable speed electronic drive is available as an add on to the OC1 Focuser - Note: this replaces the 10:1 option on the focuser.
A Quality adjustable 50mm achromatic Finder is included to assist finding the faintest of objects. No eyepieces are supplied with CT OTA's.
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OPTICS
The all new CT Ultra Newtonians incorporate the best optics available anywhere, we guarantee that!
Our reputation is built on supplying only the highest quality optics.
Our ULTRA grade optics are the culmination of over 20 years of development skills and investing over £250,000 in optical manufacturing and ZYGO testing equipment.
To further enhance the optics, our HiLUX optical coatings will increase the brightness of the image in your telescope by 25% over standard optical coatings and will also increase significantly the life expectancy of your mirror's optical coatings.
CERTIFICATION
to give you 100% assurance you are being supplied exactly the telescope's optical specification, you will pe presented with a ZYGO report with analyses of the mirror's paramaters in detail.
Please Note
Baseplate
Attachment
needed
for
either
Dovetail
(see pic
below)
Telescopes |
Mounts |
Optics |
Accessories |
CT Ultra Newtonian Range Specifications |
|||||||
|
CT8 |
CT10 |
CT10L |
CT12 |
CT12L |
CT14 |
CT16 |
aperture |
200mm |
250mm |
250mm |
300mm |
300mm |
350mm |
400mm |
Focal length |
900mm |
1200mm |
1575mm |
1200mm |
1590mm |
1600mm |
1600mm |
focal ratio |
4.5 |
4.8 |
6.3 |
4 |
5.3 |
4.6 |
4 |
adjustable 4 vane spider |
stainless steel fully adjustable |
stainless steel fully adjustable |
stainless steel fully adjustable |
stainless steel fully adjustable |
stainless steel fully adjustable |
stainless steel fully adjustable |
stainless steel fully adjustable |
focus mount |
"2" OC1 Crayford |
2" OC1 Crayford |
2" OC1 Crayford |
2" OC1 Crayford |
2" OC1 Crayford |
2" OC1 Crayford |
2" OC1 Crayford |
extension tubes |
50mm long screw threaded |
50mm long screw threaded |
50mm long screw threaded |
50mm long screw threaded |
50mm long screw threaded |
50mm long screw threaded |
50mm long screw threaded |
optical glass main mirror |
Suprax |
Suprax |
Suprax |
Suprax |
Suprax |
Suprax |
Suprax |
coatings |
Enhanced Hilux |
Enhanced Hilux |
Enhanced Hilux |
Enhanced Hilux |
Enhanced Hilux |
Enhanced Hilux |
Enhanced Hilux |
tube diameter |
250mm |
300mm |
300mm |
350mm |
350mm |
400mm |
450mm |
tube length |
860mm |
1050mm |
1440mm |
1054mm |
1450mm |
1430mm |
1470mm |
tube material |
Carbon fibre sandwich |
Carbon fibre sandwich |
Carbon fibre sandwich |
Carbon fibre sandwich |
Carbon fibre sandwich |
Carbon fibre sandwich |
Carbon fibre sandwich |
finder |
8x50 |
8x50 |
8x50 |
8x50 |
8x50 |
8x50 |
8x50 |
secondary size |
63mm |
63mm |
50mm |
75mm |
63mm |
82mm |
90mm |
mirror cell |
CNC Machined alum. |
CNC Machined alum. |
CNC Machined alum. |
CNC Machined alum. |
CNC Machined alum. |
CNC Machined alum. |
CNC Machined alum. |
secondary holder |
machined alum. with rotatable holder |
machined alum. with rotatable holder |
machined alum. with rotatable holder |
machined alum. with rotatable holder |
machined alum. with rotatable holder |
machined alum. with rotatable holder |
machined alum. with rotatable holder |
weight of tube |
7kg |
11Kg |
12.5Kg |
15Kg approx |
17Kg approx |
21Kg approx |
28Kg approx |
rings |
CNC machined tube |
CNC machined tube |
CNC machined tube |
CNC machined tube |
CNC machined tube |
CNC machined tube |
CNC machined tube |
weight of rings |
1 Kg |
1.5Kg |
1.5Kg |
2Kg |
2Kg |
3Kg |
3.5Kg |
boxed dimensions |
87x48x48 |
128x52x52 |
172x48x48 |
Box 1 - 128x52x52 |
Box 1 = 172x58x58 |
Box 1 = 172x58x58 |
Box 1 = 172x58x58 |
boxed weight |
10.7kg |
17Kg |
20Kg |
Box 1 = 14Kg |
Box 1 = 18.5 |
Box 1 = 20Kg |
Box 1 = 22Kg |
CT Package (OTA + Mount) |
Click on model to view options |
(mouse over to change view)
example shown is 300mm base plate with Losmandy 240mm dovetail.