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Since the introduction of the consumer DSLR by Canon, Hutech has offered spectrum enhanced models of Canon cameras for use by astronomers and other scientific users with photographic needs beyond the normal visible spectrum. These enhanced cameras had the rear UV/IR blocking filter replaced by a clear glass filter, which was needed to preserve the autofocus function of the camera (see description of older model rear-filter modified cameras).
However, the latest model Canon cameras* allow for adjustment of the sensor position, so the enhancement procedure consists of removing the factory IR-blocker and dust-removal filters and readjustment of the sensor position. This not only maximizes the spectral response of the camera, but also minimizes the internal reflections which are often seen in images of bright objects.
To tailor the spectral response for a specific application, Hutech provides the optional EOS Mount Filter Adapter (MFA) accessory, which allows IDAS 37mm filters to be inserted between the telescope or camera lens and the viewing mirror / image sensor cavity.
* Compatible models: 5DMkII, 7D, 50D, T1i, T2i.
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Older spectrum enhanced system with type 1b filter. |
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New reflection-suppressed, performance-enhanced system with UIBAR-MFA filter installed. |
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