I will include photos of my setup, shooting on a panasonic S5 with an adapted Sigma EF 90mm macro with a Raleno LED light. I am aware shooting with a non native lens can cause issues due to the adapters but I just want to rule out other issues first before committing to the very expensive native L-mount macro lenses.
The issue is on only present on some frames, where there is this orangey cast in the corners and sometimes a soft dark vigenette around the image. I shoot in complete darkness, and have the light source taped off.
The black and white images are from close to eachother in the roll and it is more prevalant in some than others, maybe it’s the exposure variance and it’s only appearing on the darker negatives?
On the colour images you can see the orange cast in the corners and the dark vignetting in some of the outdoor shots.
Any tips or advice would be greatly appreciated, I am considering investing in the new cinestill narrowband RGB light source, maybe that would solve some issues.
I am only able to attach one photo per post so will reply with more.
That link doesn’t work for me but I would suggest photographing a blank unexposed piece of colour negative film if you have it or failing that just the light itself with no negative. Expose, so that you get a mid tone, roughly centred histogram. I think that might show the issue up more clearly.
Sigma EF 90mm lens - that’s not a macro lens is it? I don’t think that it is an issue that another light panel will solve.
OK, I believe that’s a good lens, its predecessors were, and it focuses to 1:1. I don’t see that the EF to L-mount adapter can cause any vignetting, can’t see how it could interfere with the light path. Vignetting is going to be exacerbated by under exposed images and sometimes all you can do is correct with a Flat Field Correction or Radial mask. Hard to see how it could be the panel either though. The ‘blank frame’ shot might tell us something.
