Transposure
New member
Hey Guys,
Since you guys are the authority on this technical camera stuff, I thought I would ask the question here. I have been thinking about something and wanted to see if my hunch is correct. Since I own both a M645DF+ and a RZ67ProIID, I got to thinking...
The RZ67 throws a very large image circle on the film plane, large enough for the 60mmx70mm frame to fall within. The capture area of a Credo 60 or 80 is 53.9mmx40.4mm.
The RZ67 lenses are generally regarded pretty highly (at least for normal photography), although arguably not nearly as good as a Rodenstock. So, wouldn't a back plate on the RZ67 that would allow the back to shift offer a really nice technical camera alternative?
I drew a quick layout on CAD (see attached) and it seems that a Credo 60 or 80 could theoretically be shifted up to 17mm in each direction and still fall within the image circle area. Am I all wet with this?
If this is the case, it seems the design and fabrication of a stitching plate for the rear of the RZ would be a very desirable item and a very cost efficient way of having a lower cost pseudo tech cam.
I know someone is bound to say that the edges will be soft or a problem. And I do understand that. However, if you consider a standard MTF chart and realize that you could shift less than the maximum and stay away from the typically deteriorating ends of the MTF charts, you could avoid a lot of that.
In the attached CAD drawing, the yellow lines represent the RZ67 frame and assumed minimum image circle. The solid blue lines represent the Credo 60/80 capture area when hung on the existing rear adapter plate. The dashed blue lines represent a fully shifted Credo60/80 to the left. The right shifted position was not drawn to avoid confusion.
Please share your thoughts.
Thanks!
Ken
Since you guys are the authority on this technical camera stuff, I thought I would ask the question here. I have been thinking about something and wanted to see if my hunch is correct. Since I own both a M645DF+ and a RZ67ProIID, I got to thinking...
The RZ67 throws a very large image circle on the film plane, large enough for the 60mmx70mm frame to fall within. The capture area of a Credo 60 or 80 is 53.9mmx40.4mm.
The RZ67 lenses are generally regarded pretty highly (at least for normal photography), although arguably not nearly as good as a Rodenstock. So, wouldn't a back plate on the RZ67 that would allow the back to shift offer a really nice technical camera alternative?
I drew a quick layout on CAD (see attached) and it seems that a Credo 60 or 80 could theoretically be shifted up to 17mm in each direction and still fall within the image circle area. Am I all wet with this?
If this is the case, it seems the design and fabrication of a stitching plate for the rear of the RZ would be a very desirable item and a very cost efficient way of having a lower cost pseudo tech cam.
I know someone is bound to say that the edges will be soft or a problem. And I do understand that. However, if you consider a standard MTF chart and realize that you could shift less than the maximum and stay away from the typically deteriorating ends of the MTF charts, you could avoid a lot of that.
In the attached CAD drawing, the yellow lines represent the RZ67 frame and assumed minimum image circle. The solid blue lines represent the Credo 60/80 capture area when hung on the existing rear adapter plate. The dashed blue lines represent a fully shifted Credo60/80 to the left. The right shifted position was not drawn to avoid confusion.
Please share your thoughts.
Thanks!
Ken