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Simmod Seamless Aperture Gears are machined from solid aluminum and anodized in black.  Each gear is 0.8-module  and designed for compatibility with all industry standard motors and focusing units.  


Installation is SIMple with the supplied 6 set screws and key.  These gears are measured to fit only Tokina 28-70 f2.6 lenses.  APERTURE GEAR ONLY.


Aperture ring of this lens requires a 64mm ring.




  • 0.8-module
  • 4mm width
  • 7.5mm height
  • Anodized Aluminum
  • 6 set screws

Tokina 28-70 f2.6 Aperture Gears


    ***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.

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