The Takahashi FC-100DZ is the latest addition to Tak's Steinheil
fluorite doublet refractor line-up. The high quality optics are
optimized with a fluorite (CaF2) rear element and a front element made
of low dispersion glass with a high refractive index. This combination
produces wonderfully color corrected images with a Strehl ratio of 97.6%
across the visible spectrum. Attached you will find spot, Strehl, and
spherical aberration diagrams to support Takahashi's claims regarding
these beautiful optics.
Like other refractors in the Takahashi FC-100 series, the 100DZ is
compatible with the FC/FS Multi-Flattener and the FC-35 0.66X Reducer.
This f/8 system will reduce to f/5.3 with the addition of said reducer,
and provide full illumination to a full-frame sensor.
The FC-100DZ comes with the Takahashi 2.7" Rack & Pinion Focuser.
It has a retractable dew shield. When the dew shield is retracted and
any accessories are removed from the back end, the 100DZ becomes just
23.4" long, making it an easy scope to take with you to remote viewing
sites, solar eclipses, and vacations. The OTA weights a mere 8.5 pounds
without accessories.
The FC-100DZ is fully compatible with the accessories available used
with the existing FC-100 telescopes, including the FC/FS Muli-flattener
and the FC-35 0.66X Reducer. With FC-35 reducer, this telescope becomes
an excellent imaging system, illuminating a full frame chip at f/5.3.
Mechanically, the FC-100DZ has a tube diameter of 95 mm and a
retractable dew shield. With the dew shield retracted and accessories
removed, the total length is only 595 mm, easily carried on most
commercial flights. The FC-100DZ utilizes the same focuser used on the
FC-100DF and DL and weighs approximately 3.8 kg.
Specifications
| Aperture | 100 mm (4") |
| Dawes Limit | 0.15 arcseconds |
| Focal Length | 800 mm |
| Focal Ratio | f/8 |
| Free Shipping | Yes |
| Highest Magnification | 200x |
| Light Gathering Power | 204x |
| Limiting Magnitude | 13.8 |
| Optical Design | Doublet Refractor |
| Tube Diameter | 95mm |
| Tube Length | 595mm |
| Tube Weight | 8.5 lbs |
| Warranty | 5 Year Warranty |
Characteristics
| Characteristic |
Takahashi FC-100DZ refractor |
| Objective |
Fluorite doublet apochromat |
| Lens cell |
Air-spaced doublet. Fluorite in the back |
| Coatings |
Hard multicoatings |
| Diameter |
100 mm |
| Focal length |
800 mm |
| Focal ratio |
F/8 |
| Metal Back Distance |
223 mm |
| Focal length |
820 mm |
| Focal ratio |
F/8.2 |
| Image circle diameter |
44 mm |
| Metal Back Distance |
71.2 mm |
| Focal length |
580 mm |
| Focal ratio |
F/5.8 |
| Image circle diameter |
30 mm |
| Metal Back Distance |
56.2 mm |
| Focal length |
530 mm |
| Focal ratio |
F/5.3 |
| Image circle diameter |
44 mm |
| Metal Back Distance |
68.8 mm |
| Focal length |
1185 mm |
| Focal ratio |
F/11.9 |
| Metal Back Distance | 157 mm |
In this doublet design, Takahashi has paired the fluorite element with a low dispersion glass having a high refractive index
This combination provides excellent optical performance across the entire visible spectrum with a Strehl ratio in excess of 97.6
Fully compatible with the accessories available used with the existing FC-100 telescopes
A tube diameter of 95 mm and a retractable dew shield
Please Note: The finder and bracket shown in the photos is NOT
included with this package. To see the accessories you will receive
with your FC-100DZ, check out the What's in the Box tab.
System Chart
Telescope Specifications
FC-100DZ System Chart
FC-100DZ Reducer System Chart
FC-100DZ Extender System Chart
Mewlon-250CRS System Chart with 1.5X Extender
In the Box
- Takahashi 100 mm f/8 Fluorite Doublet Refractor
- F 50.8 AD Adapter (TKP19001)
- 2" Sleeve to 1.25" Adapter (TKP00113)
- S Coupling (TKP00103)
- 31.7 Eyepiece Adapter (TKP00101)
- 50.8 Eyepiece Adapter (TKP27110)
- 2" Extension Tube (TKP31112)
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