Product Highlights
- 156 mm Aperture f/7.8 Imaging Refractor OTA
- Triplet w/ FPL-53 and Lanthanum glasses for Apochromatic performance
- Covers full frame imaging circle (44 mm)
- Camera Format: APS-C, Full Frame
- Two-speed 3.5" Feather Touch w/ 3" RotoLock Focuser
- Color: Blue
- Includes 3 Mounting rings and Losmandy style dovetail
- Weight: 17 kg
- Includes Interchangable Camera T-Mount
- Compatible With: WO Flattener Lenses
- Includes Dust Cover with built-in Bahtinov Mask
- Adjustable Dew Shield
The William Optics Fluorostar 156 APO OTA is a high quality
Apochromatic Imaging and visual use OTA with an aperture of 156 mm and a
focal length of 1217 mm or an f-ratio of f/7.8. This Fluorostar 156 APO
OTA can also be used with an interchangable camera mounting system,
with various T-mounts for cameras (not included).
The William Optics FLT 156 Triplet Fluorostar OTA utilizes a steel
objective cell for its 156 mm lens. This steel cell has proven to be
less subject to pinching the objective due to changes in ambient
temperature when compared with a large aluminum cell. This means your
FLT-FPL-53 and Lanthanum objective will remain unconstrained and in good
alignment during sudden changes of temperature, to continue to provide
the APO performance you expect. This Fluorostar 156 APO OTA from William
Optics is provided in Blue color accents with a white tube.
If you wish to take great astro-images with a high quality APO
refractor, this William Optics Fluorostar 156 APO OTA is a great way to
achieve your imaging goals. Its FPL-53 glass air-spaced Triplet lens
design provides images with extreme sharpness, clear details, with APO
grade color correction.
Includes a Mounting Base dovetail (Losmandy type), 3.5" Feather Touch
w/ 3" RotoLock Focuser, three clamshell type Mounting Rings for the
OTA, and the new innovative Bahtinov Mask cover. The newly designed
three-piece ring and Losmandy base system provides better support for
your large refractor OTA with no chance for flexure of the tube, and it
provides a great handle and built-in base for other Vixen-base
accessories.
Introducing a first innovative feature in the industry: Now this
Fluorostar 156 APO OTA from William Optics comes standard with a dust
cover that has a built-in, clear Bahtinov Mask for perfect focusing
every time. Simply remove the flat front cover plate, leaving the dust
cover cuff in place on the OTA. Point the OTA at a bright star, and
focus carefully. When the bright central diffraction spike looks exactly
centered between the other two spikes forming an "X", then your OTA is
in exact focus for stars. Remove the dust cover cuff carefully from the
objective end of the OTA, and you are ready to image.
Specifications
Product Number: |
|
OTA Type: |
Triplet Apochromatic Refractor |
Objective Aperture: |
156 mm |
Objective Cell: |
Uses a Steel objective cell |
Focal Length: |
1217 mm |
Focal Ratio: |
f/7.8 |
Focuser: |
3.5" Feather Touch w/ 3" RotoLock Focuser |
Camera Format: |
Full Frame/APS-C Image Compatible |
Tube Color: |
Blue/White |
Tube Length: |
1120 mm (Fully Retracted) |
Tube Length: |
1330 mm (Fully Extended) |
Tube Weight: |
17 kg |
Mounting: |
Losmandy Type Dovetail in same color |
Compatible With: |
W.O. Flatteners (NOT Included) |
T-Mount: |
Interchangable T-Mount Style for Compatibility |
T-Rings: |
None, T-Rings are available as optional accessories |
Finder and Finder Rings: | None, These are available as optional accessories |
In the Box
- William Optics FLT 156 Refractor
- 3.7" Rack & Pinion Focuser