Hi Ralph et al, Perhaps below link is helpfull in determining the optical centre, http://carbonphoto.cicada.com/pdf/opticalcentre.pdf Best, Cor > -----Original Message----- > From: pure-silver-bounce@xxxxxxxxxxxxx > [mailto:pure-silver-bounce@xxxxxxxxxxxxx]On Behalf Of DarkroomMagic > Sent: dinsdag 22 februari 2005 0:05 > To: PureSilverNew > Subject: [pure-silver] Re: matting square prints >=20 >=20 > This is a matter of taste. > However, IMHO, a square print looks best mounted and matted=20 > on a vertical > board. As the print placement, the OEoptical center=B9 should be=20 > considered and > the print adjusted from there. It is easier to explain the=20 > optical center > location with the aid of some illustrations, but FWIW here is=20 > an attempt to > do so in some unpolished words, which are part of an article=20 > I=B9m currently > working on: >=20 >=20 >=20 > Print Orientation and Placement >=20 > Since it is one of the most important functions of the mount=20 > to visually > isolate the print, optimum print orientation and placement consists of > properly apportioning the space around the print. Most=20 > photographers, unless > specializing in landscapes, produce the majority of their images in a > vertical print composition. Vertical prints demand a vertical=20 > mount-board > orientation, and generally, the reverse is true for horizontal prints. > Nevertheless, horizontal prints can also be successfully=20 > mounted on vertical > mount-boards, especially when exhibited within a panel, dominated by > vertical prints on vertical mounts. Square prints call for a vertical > mount-board orientation more often than not. >=20 > Unless you are aiming for a very special effect, nobody will=20 > probably argue > with the understanding that the print should be centered on=20 > the horizontal > axis of the mount. However, attractive print placement on the=20 > vertical axis > requires a closer look into optimum print isolation and subjective > preferences. >=20 > It is commonly agreed, and obvious even to the most untrained=20 > observer, that > a print, centered on the vertical axis, appears to be placed=20 > too low on the > mount. This print placement creates the unfortunate optical=20 > illusion that > the print is not equally spaced at top and bottom. In other=20 > words, the print > seems to sag below the vertical center. To remedy this=20 > unsightly situation, > alternative print-placement techniques must be considered. >=20 > One accepted technique involves placing the print near the=20 > OEoptical center=B9 > of the mount. This makes for an attractive print placement in=20 > the majority > of situations. To find this optical center, align the upper=20 > left-hand corner > of print and mount-board in point OEA=B9. Now, bisect the=20 > remaining spaces to > the bottom and right of the print, creating lines OEa=B9 and=20 > OEb=B9, respectively. > Then, connect point OEB=B9 and OE0=B9, creating line OEc=B9, which=20 > intersects line > OEb=B9 in point OE1=B9. Finally, align the lower right-hand corner=20 > of the print > (point OEC=B9) with point OE1=B9 on the mount-board. The print is now = at the > optical center of the mount. >=20 > Nevertheless, this technique is only considered to be a good=20 > starting point, > and not an automated substitute for accomplished design or personal > preferences. If placing the print at the optical center results in an > unattractive, narrow border on top or bottom of the print, additional > vertical adjustments have to be made. While making these=20 > adjustments, the > bottom of the print must never be below line OEd=B9, to clearly=20 > avoid the print > from being optically placed too low on the mount. Line OEd=B9=20 > resembles your > individual, minimum, vertical print offset. Its location=20 > depends on your > personal preference and style, but I suggest line OEd=B9 to be=20 > at least 10% > above line OEa=B9. >=20 > Let us summarize the method of finding an optically pleasing print > placement. Locate the optical center, and place the print at=20 > that location. > If this results in the print being too high or too low on the=20 > mount, slide > it up or down until you reach a more attractive distribution=20 > of space, while > always maintaining a minimum, vertical print offset. In most=20 > cases, optimum > print placement is achieved when the print is horizontally=20 > centered and its > bottom edge is vertically located between points OE1=B9 and OE2=B9. >=20 >=20 >=20 >=20 >=20 > Regards >=20 >=20 >=20 > Ralph W. Lambrecht >=20 >=20 >=20 >=20 >=20 >=20 >=20 > On 2/21/05 8:02 PM, "Shannon Stoney" <sstoney@xxxxxxx> wrote: >=20 > > I am getting ready to mat some medium format prints. I printed them > > at 8"x8". I am trying to figure out whether it is "normal" to mat > > them in a rectangular or square mat. Would it make more sense for > > example to make the mat 16x16? or 16x20? > >=20 > > --shannon > >=20 > = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > > = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D > > To unsubscribe from this list, go to www.freelists.org and=20 > logon to your > > account (the same e-mail address and password you set-up=20 > when you subscribed,) > > and unsubscribe from there. >=20 >=20 > = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > To unsubscribe from this list, go to www.freelists.org and=20 > logon to your account (the same e-mail address and password=20 > you set-up when you subscribed,) and unsubscribe from there. >=20 ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.