Andrea B. Posted September 3, 2016 Share Posted September 3, 2016 Recently I got the new StraightEdgeU in for testing. Attached is a linked list of all the tests that were made together with a very brief summary. The dichroic StraightEdgeU is a 379FWHM52 UV-pass filter with an unusual, nearly vertical right-hand slope. The peak around 380nm means the SEU is recording primarily in the R+B channels. This can give a different, artistic UV false colour palette depending on how you convert and edit your SEU photo. With the SEU's IR-suppression between OD5-OD6, you need not worry about any IR contamination in typical UV photography. Our tests ran to 30-seconds with not a drop of IR leakage showing from the StraightEdgeU even when the converted file was severely pushed with auto-levels. With the lens open, I was able to focus through the SEU in Live View in good sunlight. Using a dichroic filter always means that with certain angles of illumination you might experience some radial discolourations in the false colour, especially when using a wide angle lens. I have not yet tested for this in depth, but the routine shots I made during testing showed almost none. I liked the results from the StraightEdgeU and have placed a reference in our filter reference: Sticky :: UV/Vis/IR Filters. [Filter Test] StraightEdgeU OD5-OD6 Wins IR Forcing Shootout! Excessively long 30-second exposures were made with UV-pass + IR-pass filter stacks. The BaaderU is shown to transmit some IR. The SEU does not. For U360-Stacks, choosing the proper thickness of the IR-blocking layer prevents IR leaks. [Filter Test] Scarecrow Garden Scene: StraightEdgeU versus the Others How does a complex, medium distance scene look under the new SEU? How does the SEU work with wideangle lens like the Noflexar 35/3.5? [Filter Test] SEU, BU, U360-Stack and The Standards The classic, boring CC Passport and Labsphere reflective standards shots. [Filter Test] Raw Colour Differences in 6 UV-Pass Filters The filters can be divided into either an "Orange" bin "Magenta" bin accordingly as the primary raw recording channels are either R+G or R+B. [Filter Test] Two Different Conversions per Filter for BU, SEU, U360-Stack Intended to illustrate that different UV false colour outcomes are possible during conversion and editing. [Filter Test] The Evil Clown of Middletown as seen by BU & SEU I always wanted to shoot this Clown in UV. But he turned out to be boring! Link to comment
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