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Introducing the SIMTray™ Filter Adapter for 77mm and 82mm circular filters to work with industry-standard 4x4 and 4x5.65 square holders.  Made of solid billet aluminum, each SIMTray is CNC precision cut and anodized in matte black.


-Precision machined from solid 6061 aluminum

-4mm thickness

-Rounded corners to mimic glass filter size and fitment


Understanding of matte box usage should be observed when using this product.  When used with wide lenses, vignetting will occur, as it would with any matte box.  


Photo's courtesy of Mark Arica.

SIMTray™ Filter Adapter


    ***Please allow 3-5 business days for engraving***


    Do you have a custom design or logo you'd like on your caps? Send it to with your order number in the subject line.


    Special Instructions:

    • Requests to change lens information and data will not be accepted once an order is submitted for processing and engraving.

    • Please leave notes and instructions for EACH cap in the "Additional Info" Section. 

    • If you're sending us a custom design file, please let us know by selecting the corresponding options or simply indicate that in your instructions.

    • If you do not see your focal length or f.stop in the pull-down menu, DO NOT select the closest number.  Please leave the exact info in the "Additional Info"  Section

    • If you will be submitting a custom design file, please note that on the order.

    • For custom designs, please download this Illustrator TEMPLATE and export as a transparent (no background) PNG file.  Email the design file to with your order number in the subject line.


    Watch Mark Holtze's video to learn more about the SIMMODING process: VINTAGE LENSES FOR VIDEO


    Our Rear EF caps utilize a 1mm thick anodized aluminum top plate, allowing us to custom engrave to your specifications. Functional and stylish.


    Want a matching Engraved Front Cap? Check them out here!


    If you do not see a brand or focal length you are looking for, simply select OTHER and leave us a note.

    Product Name


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