Center Line Filter Wheel

CenterLine Filter Wheels are chosen because of its center aperature with balanced weight. This prevents

destabilization when the filter wheel rotates.

Three general difficulties arise when a filter wheel is introduced to a system. These are discussed below, as well

as information valuable to purchasing.

Mechanical Connection to Camera

CenterLine Filter Wheels require either a front flange with a CenterLine ZTA dovetail (so the filter wheel is flush

to the camera), or an adapter that threads into the default FLI dovetail. The adapter adds approximately 8mm of

offset.

Utilizing the adapter provides easy switching between the FLI dovetail flange and the CenterLine ZTA flange if it

is desirable to do so.

Additional parts are sold by FLI, contact an FLI sales representative at sales@flicamera.com

Mechanical Connection to Telescope

Our adapters page includes several adapters, however, our customers often require a custom length to

cooperate with their back focal distance. Custom adapters are available from preciseparts.com. The

necessary numbers to calculate the back focal distance is in the following chart:

Filter Size

The most important aspect of color filter wheel selection is assuring the filter wheel uses filters that cooperate

with your sensor. If the filter is too small, vignette will appear at certain f/ ratios. A chart of all sensor FLI currently

handles is available here:

A sensors diagonal measurement is important in this situation. We recommend selecting a filter wheel capable

of handling filters with diameters greater than the sensor's diagonal, or, if the filter is square, select filters with

horizontal and vertical measurements greater than that of the sensor. Filter wheel sizes and shapes are

displayed on the following chart:

Another important aspect is the quantity of filters the filter wheel can handle. Depending on the model, between

10 and 20 filters can be stored. However, due to the double carousel design of the CenterLine wheels, one

position on each wheel is left empty. The number of filters a wheel stores is indicated by the final number in its

model identification, minus two. For example, the CL-1-10 has 10 empty positions, 8 of which are usable.

Select a filter wheel with appropriate filter dimensions and quantity of filters.

Quick Setup

1. Install FLI Software Installation Kit (Includes FLI Filter).

2. Plug the power supply cable into the CenterLine Filter Wheel.

3. Attach the USB cable between the CenterLine Filter Wheel and your computer.

4. Plug the power supply cable into a wall socket or switched AC power strip.

5. Run FLI Filter to initialize the CenterLine Filter Wheel and make control selections.

Complete Setup Procedure, including filter installation and homing procedure, is available in the online manual

found here.