I have a 2x3 Speed Graphic with a 101mm Optar. I just purchased an RH10 (6x7) roll film back and I was wondering if I should change the viewfinder mask or just stay in the center of the field. The chart on this site doesn't seem to cover this particular combination. Thanks!

The "correct" mask for this lens/format combination is the no. 2, but be advised that the no. 2 is proportioned for 6x9, not 6x7, and there is(was) no mask made for 6x7. There was a recent thread here on this very topic; see http://graflex.org/helpboard/viewtopic.php?topic=4420&forum=1&6

<font size=-1>[ This Message was edited by: Henry on 2006-10-03 19:04 ]</font>

Thanks. I was using a "23" back and avoiding the edges anyway, sounds like I don't really need to change much.