• p1011977c_focus1
    FW8G-STTP1012580ar2
  • FW8G-STT

    SKU: FW8G-STT

    $2,195.00

    Self guided filter wheel for STT cameras

Product Description

SBIG FW8G-STT is a self-guiding 8-position filter wheel for the STT Series cameras.  This wheel has a guiding CCD and associated optics built into the front cover, in front of the filters.  Due to the backfocus requirements, camera lens adapters will not work with this cover.  A lower profile standard cover, without guider, is available as an accessory.  The standard cover is easily swapped for the self-guiding cover when imaging through a camera lens is desired.

fw_detent_close1Features

The carousel holds eight 36mm filters and inserts are available for 1.25″ filters. Full sets of 36mm filters for unvignetted imaging at any f/ratio.

The unique feature of the STT filter wheel is a positive centering mechanism that precisely re-positions and firmly holds filters in exactly the same position over the CCD every time, regardless of a loss of power or intervening movement of the filter wheel.

In our tests, using an STT-8300, the re-positioning of the filters was accurate to better than 5.4 microns after several complete rotations of the filter carousel.  This degree of precision means that flat fields taken after the filter has moved and returned are accurate to a single pixel.  An example of the improvement in flat fields with this kind of precision is demonstrated in the comparison images below.

The image below shows a a large opaque spot on a filter in STT filter wheel (left).  The filter carousel was rotated several times before the filter was moved back into the optical path and a flat-field was taken.  The image at right shows the resulting flat-fielded image.

flatfield2

Additional Information

A/D Converter

16 bits

Adaptive Optics Option

N

Antiblooming

y

CCD Size

4.8 mm x 3.6 mm

Computer Interface

HDMI

Cooling Delta

na

Dark Current e/p/s at 0 C

0.5 e-/p/s

Exposure

0.001-3600 sec

Filter Size

36mm / 1.25″

Filter Wheel Option

n

Full Frame Download

0.13 sec

Full Well Capacity

25,000 e-

Imaging CCD

KAI-0340

Imaging / Pixel Array

648 px x 486 px

Internal Tracking CCD

n

OAG Option

n

OS Compatibility

Windows 32 and 64 bit OS, Mac

Pixel Digitization Rate

N/A

Pixel Size

7.4 μm

Power

HDMI

Read Noise

8.6 e-

Remote Guide Head

n

Self-Guiding Filter Wheel

n

Shutter

Electromechanical

Temperature Regulation

n

Total Pixels

314,928 pixels

Weight

2.2 oz

User’s Manual

Installation, and operation instructions for FW8S/FW8G-STT Filter Wheels.

Download

 

Backfocus Table

Backfocus configuration table

Download