FW8S-Aluma

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FW8S-Aluma
Part Number: FW8S-Aluma
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Product Description

FW8S-Aluma is the standard (non-guided) 8-position filter wheel for Aluma Series cameras.  This filter wheel does not have a built-in self-guiding image sensor.  It is compatible with Canon EOS and Nikon lens adapters.

fw_detent_close1Features

The carousel holds eight 36mm filters and inserts are available for 1.25? filters.  The 36 mm filters provide unvignetted imaging for the largest Aluma sensors.

Aluma wheels include a positive centering mechanism that precisely centers each filter in the exact same position every time. This single-pixel accuracy completely eliminates ghost images of dust spots and other artifacts after flat-fielding.

The left-hand image below shows a dust spot on the filters.  A flat-field calibration frame was taken, then the filter wheel was rotated several times before taking a second picture, which was flat-field calibrated, at right.  No evidence of the dust spot is visible.  This high precision results in the highest quality images and excellent photometric accuracy.

 

flatfield2

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