Mirror Diameter - 610 mm (24 inch)
Mirror Thickness - 40 mm (1.625 inch)
Focal Length - around 2700 mm (106 inch)
Focal Ratio - F/4.5
Material - Supremax33 low expansion glass, fine annealed, origin Schott AG factory in Germany
Coating - Aluminum coating 91% reflectivity
Mirror Weight - 16 Kg
Circle in the center for easy and minute collimation
Strehl > 0.8
Interferometer test report included
Price - 6,000 CAD
Telescope Specifications - Sky Observing 24 (Complete telescope with 24-inch mirror)
Primary mirror - 610 mm diameter (24 inch) - see above mentioned mirror specifications. The 1.625" thin mirror cools fast in about 1 hour and after follows the air temperature drop during the night. Compare this with thicker mirrors which are not capable to follow the temperature drop during the night. Primary mirror which is 2 inches thick will need forever to cool down, and even if we suppose is cooled down, it is not capable to follow the fast temperature drop of the air after the sunset.
Focal Ratio - F/4.5
Focal Length - around 2700 mm
Secondary mirror - 4.0 inch minor diagonal secondary mirror from well-known supplier, expensive with 1/10 wavefront error (1/20 wave surface error), enhanced aluminum coatings 96-97% reflectivity, interferometer test report included
Heavy duty spider and secondary mirror holder with requred off-set from well-known supplier
Top of the line Moonlite dual speed focuser with 8:1 ratio, low-profile, the newest model with 1.5 inch travel.
Secondary mirror dew heater with RCA jack ready to connect to 12 V DC power
Cooling fan ready to connect to 12 V DC power
1.25 inch diameter aluminum trusses, strong and lightweight, they are connected in pairs at their top ends for faster and easier installation
Aluminum handles, lightweight with 8" pneumatic wheels
Wooden box for storing and protecting the mirror when not in use.
Light shroud made from quality non-transparent stretchable material.
Baltic birch cabinet grade hardwood used - stained and varnished several times
The telescope is optically and mechanically excellent. It holds the collimation without any problems all night - once you collimate the scope - it is collimated till the end of observing. Very easy to collimate. It takes maximum 5 minutes total time.
Mirror cell is with 18 points supporting without problem the mirror. No fancy things placed bellow the mirror to act like a mirror cell reinforced with some scientific theories to make you think that the mirror is supported properly. Mirror cell is all steel in order to be strong and not deformed under the weight of the mirror.
Mirror is held by steel cable with adjustable length (again no fancy mirror supports coupled with some scientific theories) - very easy to place the cable around the mirror and also very easy to center the mirror inside the mirror box simply with adjusting the length of the cable sling - you just tighten the cable sling and the mirror is centered in the mirror box. Adjusting the cable length is very easy. Also cable sling can be adjusted in height for proper support of the mirror.
Fine 24 TPI (threads per inch) collimation rods and big 3.25 diameter collimation knobs make the colimation very easy.
All work in the mirror box: positioning and centering the mirror, attaching and adjusting the sling around the mirror, tightening the mirror pins and clips and whatever else can be done by hand and very easy without effort and frustration, no tools required. Everything is with knobs. Also the mirror box is completely open from top making everything inside the box accesible and easy to work. Once you collimate the scope there is no need to check and do it again, it is collimated till the end of the observing.
The telescope is designed to perfection - it is with classic design, but lightweight and portable at the same time - making it easy to load, transport, unload, move around and set up. Also the bearings are detachable which allows the whole scope when disassembled to fit even in a car to transport it to dark location for observing. Excellent design allowed the mirror box to be only 6 inches tall and rocker box to be only 5 inches tall. Pictures do not tell everything - you need to see the design to believe it.
Moving the scope in altitude and azimuth is very smooth and precise and requires very little force. Big bearings make the movement even smoother and easier and allow very precise positioning on the target.
The telescope has perfect balance. But if you load the telescope on its top side with heavy Paracorr2 and heavy Nagler31 then small counterweights ( which are supplied ) needed to be attached at the bottom of the mirror box.
At front of the mirror box there is already installed battery holder for attaching battery 12 V 12 AH
Maximum tilt of the telescope is 82 degrees.
Moving the telescope is smooth and easy and you can move it up-down and left-right with one finger.
Looking at the size of the scope on the pictures bellow you will probably ask if it is really 24-inch telescope or maybe I uploaded by mistake pictures of 18-inch or 20-inch telescope. Yes, it is 24-inch telescope yet its mirror box and rocker box are same size as competitors 20-inch scopes you used to see at star parties.
Compare all above mentioned with other manufacturers. Quality optical and mechanical components (quality primary mirror, quality secondary mirror, Moonlite dual focuser, strong and 18 point mirror cell, 24 TPI fine threaded collimation rods and big collimation knobs for easy collimation) and so many free extras (secondary dew heater already installed with wires pulled outside with RCA jack ready to be connected to the controller, heavy duty spider and heavy duty holder, off-set of the holder already done, thin primary mirror, lightweight primary mirror, cooling fan with jack ready to be connected, interferometer test for primary mirror, interferometer test for secondary mirror, primary mirror center spot for easy collimation, super low profile focuser, detachable bearings, lightweight mirror box and lightweight rocker box.
Every telescope is custom made one each at a time, and after finishing is tested two or three evenings real observing to ensure that it performs perfectly optically and mechanically and to check that every single component functions properly, and to adjust the optical alignment of the components. No need to disassemble the secondary holder in order to install secondary heater and to attach or glue its wires, no need to drill holes to install the dew controller holder, no need to install new bigger and better collimation knobs and new and better collimation bolts, no need to install fan, no need to cut and adjust the trusses when you receive the scope, no need again to assemble and align the secondary holder and so on. The scope is ready for observing.
Mirror Box + Mirror Cell + Bearings = 27 Kg
Rocker Box + Base = 18 Kg
Trusses = 7 Kg
Secondary Cage = 7 kg
Mirror = 16 Kg
Eyepiece height at zenith = 103 inches = 2620 mm
For observing objects up to 45 degrees altitude one step of a stepladder needed, from 45 to 70 degrees altitude where you will do most of observing degrees two steps of the stepladder needed.
Price - 10,000 CAD