Takahashi's Mewlon series reflectors are long focal length telescopes with high F/D focal ratio. The primary mirror is ellipsoidal while the secondary mirror is spherical. The surface accuracy of the optics is at least λ/20.
Takahashi’s CRS series of Mewlon telescopes leads the industry in advanced design and optical quality. At their heart is the Dall-Kirkham Cassegrain telescope design, coupled with a corrector that provides Ritchey–Chrétien like performance. In addition, the CRS series has an electronic focusing system controllable with an ASCOM driver or in an autofocus mode. Each CRS telescope features a primary mirror cooled by 3 fans.
The CRS models incorporate a field corrector with ED glass lenses that provides a focal ratio of F/10 along with a larger, better corrected field converting the telescope to a flat field instrument for imaging and visual observation. The motorized focusing, ASCOM compatible, is done by translating the secondary mirror. The fans responsible for heating the primary mirror are managed by 3 temperature sensors located inside and outside the tube.
The Mewlon-300CRS is perfectly suited for planetary observation and imaging, due to its long focal length. It is also ideal for deep sky applications; equipped with the F/7.2 reducer it will allow the imaging of compact objects such as planetary nebulae or galaxies.
The Mewlon 300CRS is delivered with 7x50 finder scope and with a pair of tube-rings connected by a bridge plate located at the top of the OTA.
| CHARACTERISTIC | TAKAHASHI MEWLON-300CRS REFLECTOR |
| Optical design | Modified Dall-Kirkham |
| Combination | Concave elliptical primary mirror + convex spherical secondary mirror + field corrector |
| Diameter | 300 mm |
| AT PRIME FOCUS | |
| Focal length | 2960 mm |
| Focal ratio | F/99 |
| Image circle diameter | 40 mm |
| Metal Back Distance | 189.5 mm |
| WITH RD CR0.73X FOCAL REDUCER | |
| Focal length | 2160 mm |
| Focal ratio | F/7.2 |
| Image circle diameter | 35 mm |
| Metal Back Distance | 72.2 mm |
| WITH EX CR1.5X FOCAL EXTENDER | |
| Focal length | 4475 mm |
| Focal ratio | F/14.9 |
| Image circle diameter | 44 mm |
| Metal Back Distance | 117.5 mm |
| CHARACTERISTIC | TAKAHASHI MEWLON-300CRS REFLECTOR |
| Length of the optical tube assembly | 1140 mm |
| Diameter of the optical tube assembly | 324 mm |
| Weight | 27 kg |
Spot-diagram of Takahashi Mewlon-300CRS reflector at prime focus
Spot-diagram of Takahashi Mewlon-300CRS reflector with RD CR0.73X focal reducer
Please note: mount, tripod, tube holder and finder sold separately.
Included in the box:
Optical Tube Assembly
M90-72 Coupling TKP83111
50.8 (2") Sleeve TKP00113
Coupling (S) TKP00103
Aux. Ring (prime focus) TKP83002
Ocular adapter (31.7) TKP00101
Ocular adapter (50.8) TKP27110
Extension tube (50.8) TKP31112
System Charts
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