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Home > Mounting Products > Pre-cut Picture Window Mounts > Pre-cut 500x400mm Picture/Photo Window Mounts

Pre-cut 500x400mm Picture/Photo Window Mounts

We offer a range of colours in our 500x400mm picture window mounts which are available from stock in two standard aperture sizes which are perfect for camera clubs, but can also mount in 20x16" (508x406mm) frames provided the backing board is the full 20x16" and attached to the mount.

  • A4 Standard aperture - 190x280mm - centrally positioned for either portrait or landscape images.
  • A3 Standard aperture - 280x400mm - centrally positioned for either portrait or landscape images.
To broaden the applications for 500x400mm window mounts we have added 5 new sizes of aperture, which are only available in Snow White Textured Board with white core.  
  • Letterbox/Panoramic aperture - 140x400mm aperture in landscape format positioned so that the mount has a slightly deeper base than top  - please note that Pinnacle Premium Lustre A5 Panoramic paper 148x420mm fits this window.
  • A3 3:2 Ratio aperture - 390x260mm sized window is designed to be used with A3 paper and to avoid the need for cropping when using most popular cameras, which use a 3:2 aperture ratio.
  • A3/16x12" 4:3 Ratio aperture - 390x293mm sized window is designed to be used to avoid the need for cropping when photographing in a 4:3 aperture ratio, A3 print.  It will also fit a 16x12" (406x305mm) print, although the very edge of the print will be lost if it if borderless. 
  • A3 with 70mm border - aperture size 360x260mm. We have offered this size in response to the number of requests for similar sizes of bespoke apertures.     
  • 280mm Square aperture - 280x280mm aperture, which fits the largest square which can be achieved from an A3 sheet. The aperture is positioned so that the mount has a slightly deeper base than the top.

Bespoke Apertures also available - choose your own size and position of aperture, made to order.

Take approximately 5 working days to produce plus your chosen delivery time.



All of our boards have been guillotine trimmed for accurate sizing and clean edges and the windows have been cut with computer precision controlled equipment.


Photos on this site are a representation of colours available. Actual colours may vary. Free colour swatch available

Assorted pack of Snow White Textured Window Mounts. 7 Sheets.
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A4 Standard aperture -190x280mm. Centrally positioned for either portrait or landscape images.
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A3 Standard aperture - 280x400mm. Centrally positioned for either portrait or landscape images.
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280mm Square aperture - 280x280mm aperture, which fits the largest square which can be achieved from an A3 sheet. Slightly deeper base than the top.
View
A3 3:2 Ratio aperture - 390x260mm sized window is designed to avoid cropping when using most popular cameras, which use a 3:2 aperture ratio.
View
Letterbox/Panoramic aperture - 140x400mm aperture in landscape format positioned with slightly deeper base than top.
View
Aperture size 360x260mm
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A3/16x12" 4:3 Ratio aperture - 390x293mm sized aperture avoids cropping when using most popular cameras, which use a 4:3 aperture ratio.
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Choose your own size and position of aperture.
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