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SBIG CFW-9 Manual

Color filter wheel
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CFW-9
Color Filter Wheel
Manual
SBIG - Santa Barbara Instrument Group

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Summary of Contents for SBIG CFW-9

  • Page 1 CFW-9 Color Filter Wheel Manual SBIG - Santa Barbara Instrument Group...
  • Page 2 Copyright Notice This manual is copyrighted by Santa Barbara Instrument Group (SBIG). This manual may not be copied in whole or in part. CFW-9 Manual Version 1.1 Printed 2006 ©2006 Santa Barbara Instrument Group 147-A Castilian Drive Santa Barbara, CA 93117...

  • Page 3: Table Of Contents

    Introduction ..................1 Overview of Taking and Processing Color Images ...... 2 Telescope Work ................2 Color Image Processing............. 3 Hardware Reference ................. 4 Making the Electrical Connection..........7 Maintenance of the Color Filter Wheel ........12 SBIG CFW-9 Page i...

  • Page 4: Introduction

    ROUP The CFW-9 Color Filter Wheel NTRODUCTION This manual describes Santa Barbara Instrument Group's CFW-9 Color Filter Wheel. This product can be used with CCDOPS, CCDSoftV5, and other software to facilitate taking and processing of color images with USB versions of the ST-7/8/9/10/2000 cameras. This list may be expanded as we add new models.

  • Page 5: Overview Of Taking And Processing Color Images

    Blue or match the exposure duration of each primary image to the brightness of the object. Typical ratios of Red : Green : Blue are 1 : 1 : 1.6 to match the exposure to the CCD's sensitivity using SBIG Filters, although accurate color balance should be done for your system with neutral gray objects or "white"...

  • Page 6: Color Image Processing

    Note: In most cases, before doing a color merge, attempt to have all RGB images saved with a similar range or contrast setting. This will make the initial result closer to what you desire. SBIG CFW-9 Page 3...

  • Page 7: Hardware Reference

    SBIG provides optional filters for use with the CFW-9. The filter wheel attaches to other accessories through the universal T-Thread. The front and back of the CFW-9 have apertures with female T- threads. Using T-Thread makes the CFW-9 adaptable to a variety of telescopes.
  • Page 8 “D” attached to the face plate of the camera. It has three set screws holding an internal ring that has female T-Threads]. 2. Remove the cover of the CFW-9 and pull the filter magazine out of the housing. 3. Remove the four rubber hole plugs from the rear of the CFW- 9 by pushing them through the housing with a small allen tool.
  • Page 9 ARBARA NSTRUMENT ROUP these in case you decide to later use the CFW-9 with the T-Thread coupler or with a different camera. 4. Using the four 4-40 by 3/16 socket screws provided, attach the CFW-9 cover to the front of the ST-7/8/9/10/2000. Make sure...

  • Page 10: Making The Electrical Connection

    NSTRUMENT ROUP Making the Electrical Connection The CFW-9 has a cable that comes out the side that needs to connect to your camera electronics. The CFW-9 gets it power and positioning information from the camera thru this connector. This cable plugs into the I2C-AUX port on the ST-7/8/9/10/2000 USB camera.
  • Page 11 CFW-9 and this is accomplished by selecting the CFW-9 as the filter wheel type in the Setup command of the Filter menu. If you have an older version of CCDOPS that does not show the CFW-9 you should update your software and drivers by downloading the latest version of CCDOPS and Driver Checker Utility from the SBIG web site.
  • Page 12 2" nosepiece should be used if possible. SCT users should use the optional T-thread Visual Back to make a more secure attachment. First Use Before starting observing session, particularly after equipment changes / modifications, test the filter wheel and camera SBIG CFW-9 Page 9...
  • Page 13 IR blocking filter is not needed. The filters used in the SBIG filter wheel have been chosen to optimize the accuracy of the colors produced by the tri-color software. The passbands of each filter are summarized in the table below:...
  • Page 14 Horsehead Nebula, have very low contrast relative to the sky background, often less than 10%, and would never stand out sharply. The images you see on the computer screen are not true, in the general sense, being considerably SBIG CFW-9 Page 11...

  • Page 15: Maintenance Of The Color Filter Wheel

    If some part of the CFW-8A assembly is damaged, replacement parts may be obtained from Santa Barbara Instrument Group. Disassembly of the CFW-9 is rather straight-forward. You can remove the front cover by removing the six screws that hold it in place.
  • Page 16 "clicking" sounds. You do not need to worry about the angular orientation of the magazine as the unit will auto home itself upon power-up. SBIG CFW-9 Page 13...