IkarusJohn Posted May 19, 2015 Share #81 Posted May 19, 2015 Advertisement (gone after registration) I find yellow and orange filters work well. I've had terrible results with medium to deep red filters even with the APO Summicron Asph. There's a substantial focus shift that's hard to nail when shooting wide open. Theoretically, if you focus wide open using live-view, the focus shift using red filters shouldn't be a problem; if focusing using live-view is accurate and provided you don't introduce further focus shift when you stop down. It is clear, though, that focusing on near(ish) subjects using the optical view finder and a red filter will result in significant focussing issues. Not so sure the same applies with objects at or near infinity - e.g. clouds and skies. I haven't found Olaf's post on this, but I think that is the end result. I have the original Monochrom (and won't be upgrading); this means that I use the red filter infrequently and I do focus bracket - it's a hopeless combination for close objects shot wide open. I use a yellow filter mostly. Quote Link to post Share on other sites More sharing options...
Advertisement Posted May 19, 2015 Posted May 19, 2015 Hi IkarusJohn, Take a look here M Monochrom & Filters. I'm sure you'll find what you were looking for!
Lenshacker Posted May 19, 2015 Share #82 Posted May 19, 2015 (edited) I find yellow and orange filters work well. I've had terrible results with medium to deep red filters even with the APO Summicron Asph. There's a substantial focus shift that's hard to nail when shooting wide open. That is surprising! It's certainly not the lens, it's correction most likely holds into the Infrared. I need to try an experiment with the Full-Spectrum camera and the Pentax 85/4.5 Ultra-Achromat (calcium Fluorite) to see if the filters shift the focus. Filters built into and behind the lens- I can understand if they are built to a different thickness. But in front- it would have to have some sort of Diopter factor? Edited May 19, 2015 by Lenshacker 1 Quote Link to post Share on other sites More sharing options...
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