top of page



This reproduction rear aspherical glass is made specifically for the Canon nFD 85mm f/1.2 L lens.  This glass is made to be used in conjunction with the Edmika Simmod Lens nFD to EF Conversion kit.  


Kit includes:

  • Rear Aspherical Replacement Glass
  • Delrin Machined Glass Holder
  • Felt Bag


Use of this glass will not convert your lens to EF.  You must purchase the Edmika Simmod EF Conversion kit for the 85mm f/1.2 L to utilize this glass in the conversion.  


Press Release:  A world first in the field of vintage lenses, from Simmod Lens


A note from Ron:

The glass was reverse-engineered from a dozen or so original samples.  We could not obtain blueprints from Canon archives, so we had to design the replacement glass through examination and reversal of what was made by Canon.  The magnification of the glass is spot on; however, having worked with dozens of these lenses, the coating on each is never the same. There is a lot of inconsistency from lens to lens. Therefore, the coating we applied to our replacement version was a happy median between all of the original samples we worked off.  The replacement glass is coated on both sides with multiple layers. The result is as close as we could get to the original.  I don’t want to open the floodgates for debate whether it’s the same or how off it is from the original because it’s all relative to only the copy of the lens you are comparing it to.  That said, I believe it is the best-last resort if your 85 L has broken glass that is no longer usable.



    ***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


    Options Title

    Custom Text Field Question

    Upload Design
    Home Decor
    Please check all the fields above.
    bottom of page