colinbm Posted April 21, 2021 Share Posted April 21, 2021 Five Different Yellow Filters Stacked With A DB850 Filter, on a full spectrum Sigma fp camera.I had the Canon 40mm pancake lens on the camera. Did I say they go together like a hand in a glove.I also measured the transmittance of the five yellow long pass filters, & I have posted the photos in order of shortest to longest cut on, which was between 475nm to 570nm.The DB850 remained on the lens & each yellow filter was CWB on the camera with a grey card, before each photo was taken as a DNG Raw file.Each DNG raw file was opened in IrfanView which automatically converted the photo to a .jpg file.The photo was only channel swapped from an RGB to GBR. No further processing was done except to reduce the file size to 1000pixels wide.Here are the five examples, in the order of the yellow filters cut-on wave length at 1/2 width. PS, I have ordered a Tiffen #12 filter. 1/ Generic yellow @ 475nm, with a DB850 filters. 2/ Hoya K2 @ 475nm, with a DB850 filters. 3/ Unknown XO @ 490nm, with a DB850 filters. 4/ Schott OG 550 @ 525nm, with a DB850 filters. 5/ B&W 099 @ 570nm, with a DB850 filters. Link to comment
Christoph Posted April 21, 2021 Share Posted April 21, 2021 Very interesting! Looks nice! Link to comment
Christoph Posted April 21, 2021 Share Posted April 21, 2021 Colin, do you have a Green X1? I always wondered how the DB850 behaves (in contrast to KG3) in combination with X1 and X1 plus Yellow stack... Link to comment
Christoph Posted April 21, 2021 Share Posted April 21, 2021 Ha! Look at that: some blue trees with blue sky - that's your first image - channel mixing and a little slider work... sooo...the perfect initial image (for blue trees), if you go the standard channel mixing route, would be deep red trees and orangeish sky... Link to comment
colinbm Posted April 21, 2021 Author Share Posted April 21, 2021 Yes I do have a Green X1 to try-out with.Ha ha blue trees, maybe I should post the before swap photos too ? Link to comment
Christoph Posted April 21, 2021 Share Posted April 21, 2021 Yes I do have a Green X1 to try-out with.Ha ha blue trees, maybe I should post the before swap photos too ? If you could try out Db850 + X1 ....and Db850 + X1 + K2 --- that would be awesome! Beautiful Place btw! Link to comment
colinbm Posted April 21, 2021 Author Share Posted April 21, 2021 I'll try for tomorrow ChristophThis is the end of my street, we live 1.5m above sea level & it hasn't risen 1cm in 50 years.I chose this shot as it has the most variety of vegetation. Link to comment
Christoph Posted April 21, 2021 Share Posted April 21, 2021 Awesome - looks really tropical. Never been to the Land of Oz, but definitely will go one day! No worries with the test - only if you have time etc... BTW: Just took a closer look at your profile image--- is that a Bigfoot? Link to comment
colinbm Posted April 21, 2021 Author Share Posted April 21, 2021 This is the bluest before the swap, it is the forth photo. This is the park across the road from this house. Link to comment
colinbm Posted April 21, 2021 Author Share Posted April 21, 2021 Awesome - looks really tropical. Never been to the Land of Oz, but definitely will go one day! No worries with the test - only if you have time etc... BTW: Just took a closer look at your profile image--- is that a Bigfoot? Yes it is 'Big Foot in his Cave', it is in a children's park at Surfers Paradise, not far from here, it is a splitting image of me....ha ha Link to comment
GaryR Posted April 21, 2021 Share Posted April 21, 2021 Awesome scenery in your neighborhood! I really like the blue version. Link to comment
colinbm Posted April 23, 2021 Author Share Posted April 23, 2021 And some more....Same set-up & routine as before.... 1b/ Hoya XO 470nm+ DB850 CWB swap to GBR. 2b/ Marumi Y2 480nm+ with DB850 CWB swap to GBR 3b/ Hoya X1 1/2 width 480-580nm with DB850 CWB swap to GBR 4b/ DB850 only CWB swap to GBR Link to comment
colinbm Posted April 23, 2021 Author Share Posted April 23, 2021 And just to show you I can do a bit of UVA with the Canon EF 40mm pancake..... Link to comment
Christoph Posted April 23, 2021 Share Posted April 23, 2021 x1 is spectacularly unspectacular! Thanks for testing! It‘s so close to just the DB850 - meaning it acts like a DB850, hence the good „Aerochrome properties“.... Link to comment
colinbm Posted April 23, 2021 Author Share Posted April 23, 2021 x1 is spectacularly unspectacular! Thanks for testing! It‘s so close to just the DB850 - meaning it acts like a DB850, hence the good „Aerochrome properties“.... No worries, all fun to do & learn Link to comment
Andrea B. Posted April 24, 2021 Share Posted April 24, 2021 Very nice series, Col.I really like these palm trees in alternate lights. They make for very cool photos. And I also am happy to see filter tests like this. It is very informative for everyone. I'm now wondering if I could get anything interesting like this using my local cholla cactus as a subject?Hmmmm......it might be time to gear up and get outside again. Link to comment
colinbm Posted April 26, 2021 Author Share Posted April 26, 2021 I found two more yellow filters, a Shott OG515 that cuts-on at 500nm & a Chinese CB535 that cuts-on at 525nm. 6/ Shott OG515 500nm+ with DB850 CWB swap to GBR 7/ CB535 525nm+ with DB850 CWB swap to GBR Link to comment
colinbm Posted April 28, 2021 Author Share Posted April 28, 2021 The original five has now stretched out to twelve yellow filters passing from 470nm to 570nm all with the DB850 & channel swapped to GBR. Here is the latest addition of a Tiffen #12 filter, which passes from 510nm again with the DB850 & CWB in camera & channel swapped to GBR. Link to comment
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