• Members 115 posts
    June 19, 2023, 2:10 a.m.

    Hey all! I have a capture question for you.

    As seen in another thread here, I've been going back through my various filter options to get some more up to date reference images captured with everything from visible light to full spectrum to orange, red, pure IR, and blue/IR. As part of the experiment, I've been keeping focus and aperture manually controlled and fixed between filters. I always knew that light focuses differently at different wavelengths, but I never really appreciated just how much of a difference it can make- previously I had always just picked a filter to work with and focused with that filter.

    I'm doing a lot more shooting with a split-spectrum blue/IR filter and I'm also trying to get something I like out of full spectrum captures right now. As I look more critically at the results, I think I'm starting to see the impact of the different wavelength focus distances. I'm curious as to how folks who shoot wide-spectrum or split-spectrum like this handle focus/depth of field. Stop down more so it's not noticeable? Embrace the odd effects at shallow(er) depth of field? Focus bracket and stack? Something else?

  • Members 1737 posts
    June 19, 2023, 3:41 a.m.

    It’s an expensive solution, but you can use a lens designed for low LoCA throughout the visible and into the infrared range like the Coastal Optical 60 mm f/4.

  • Members 160 posts
    June 19, 2023, 6:03 p.m.

    So far, I just have not worried about it. Maybe I should!

  • Members 115 posts
    June 20, 2023, 5:47 p.m.

    I have been known to overthink things 😅