rfcurry Posted January 1, 2017 Share Posted January 1, 2017 I recently tried a 52mm hot mirror to capture Vis images with my full spectrum modified Lumix. What a difference from the cyan absorbent filters I had been using to depress the NIR! The images are crisper, the whites, whiter, and the hues just a tad more saturated. The hot mirror transmits 386nm to approx 650nm. Below is the hot mirror image - Lumix GF1, CZJ Tessar 50/2.8, ISO 100, f8, natural sunlight through double-paned glass, in-camera WB, 1/320s. No PP except to crop and reduce to 900px width. BG14 1.5mm Hot Mirror with R72 at 10s It felt good to have such a simple return to the visible images native to the camera. YMMV Link to comment
OlDoinyo Posted January 1, 2017 Share Posted January 1, 2017 Some cameras do better with the BG-type glass and others do better with dichroic-type filters. When I had a Sigma, I noticed that it did better with the dichroic filters; my Sony does better with the BG glass. The dichroic filters are, however, prone to angle-degradation if used on wide-angle lenses. Link to comment
rfcurry Posted January 1, 2017 Author Share Posted January 1, 2017 True, the wavelength shift of dichroic filters due to AOI is always a consideration. I find it interesting that you had different responses based solely on the sensor. Do you have any thoughts as to the underlying causes?Thanks. Link to comment
Andrea B. Posted January 5, 2017 Share Posted January 5, 2017 Reed, any info about your "hot mirror"? Who makes it? Transmission chart? Link to comment
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