[Roelf-jan Wentholt]

Focussing on Eternity, great name for a film business!

[Roelf-jan Wentholt]

Hello Bill, Thank you for your respons. I think I see the same problem I encountered in your footage: vignetting (or more vertical darkening at the very edges). For a critical judgement of the focus the picture you showed me is too small. I think I found the optimum set up. It is indeed a very precise set up. And the tiniest touch of the zoom handle means you have to re-adjust the back focus. In many situations the darkening of the edges may not matter that much. Even a bit of soft focus at the edges does not show in many shots. But I have really critical clients… The idea of these 35 adapters anyway is fantastic. I can make shots that look like 35 mm. No kidding!
Just to double check. I set the adapter in a so called hard set up. So the distance camera lens, achromat, adapter is fixed. Then I zoom out, put my lens on macro and zoom in to find that one hundreth of a milimeter setting. And before doing this all I set the ground glass as precisely as possible to match focus of the 35 lenses. The last setting I never got completely right: When focussing on ‘eternity’ (how do you call this in english?) My lens reading is somewhat before eternity. This means the ground glass should move towards the camera but I do not have any play left there. Maybe this is a construction error.