Hutech Astronomical Products - IDAS 72 & 82mm RGB Filters

IDAS RGB 72 & 82mm Filter Sets
for Medium or 4x5 Format Photography

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IDAS 72mm and 82mm Type 00 RGB filters are perfect for medium and 4x5 format high-resolution imaging with Kodak Tech Pan fine-grained film. The superior optical quality and transmission characteristics surpass the capabilities of Wratten gel filters and enable the full capability of the imaging system to be utilized.

Plots of the filter responses and combined filter and Tech Pan response are shown below. Recommended Tech Pan exposure ratios are 1:1.5:1.5 (R:G:B).

RGB filter curves (actual production lot)

Tech Pan * RGB filter design spec curves