ho to make a 6x4.5 viewfinder mask for mamiya RB67proS

Hello,

I'd like to make a 6x4.5 viewfinder mask for RB67proS from (black?) paper. would someone please post the exact

dimensions. thanks!

best regards,

g.

Why not measure the opening on the 645 back?

 

If you measure the 60x70 back and then to the screen, you can use the same % up or down on 645.

 

Use a recipie card and cut it out with a Exacto knife and straight edge. Then color it black with a magic marker.

The viewfinder in an RB is real-size, as are any crop marks. You can use 6.0 x 4.5 cm, or look up the exact size on line. I doubt that 0.1 mm, or even 1.0 mm makes that much difference.

 

I make masks in a drawing program (e.g., Adobe Illustrator) and print them in a laserjet on transparency stock, then cut them to fit. You have to measure the GG for an exact fit, inside the frame if any. If you don't trust yourself to observe a thin line (typically 0.25 points), you could shade the outlying area.

thank you. I couldn't find the size online. but if the viewer is real size, I could simply put the paper on the film back to get the cutout model, which is ... 57x41 mm, so it should look like the illustration in the attachment, right?<div></div>

with the outside dimensions 7x7<div></div>

Actually, I measured my film back and viewfinder screen, and the lines on the screen are approximately 2mm smaller than the film aperture on the back. so it is not real size, at least on my RB67 proS.