Goertz Red Dot Artar lenses

[CreationBear]

SK Grimes.

Of course another way to go is to have SK Grimes fabricate a step-up ring that will accept modern threaded filters--that way you can use pinch-caps or the appropriate Kaiser push-on cap. That's the way I went, with the rationalization that the typical RDA is such a good "bang-for-the-buck" option optically that pimping one out is just playing with house money.

That said, I did buy an Ektanon from LA-based photographer Andrew Glover (an experience I heartily recommend, just for the jokes) that had a cap from a Pringles can protecting the rear element, so field expedient solutions are available.

[John Kasaian]

There are plenty of easy DIY lens cap instruction on the 'net. Check 'em out.
This one is way more involved, but I really like the end product
http://lungov.com/wagner/DIYLensCap.html

[Chris1260]

Thanks abruzzi ~ Of course - because you can add a non-lens-scraping-yet-safely-friction-securing liner more easily than evenly scraping off the required amount. Better rounding up than down - a good tip!

[Chris1260]

Of course another way to go is to have SK Grimes fabricate a step-up ring that will accept modern threaded filters —

Ah-Ha! A very good idea that I can easily add to my SK Grimes order. - Thanks CreationBear!

[Chris1260]

There are plenty of easy DIY lens cap instruction on the 'net. Check 'em out.
This one is way more involved…

Oooh! This is fascinating and looks like a really cool project, particularly for those like me who’ve always wanted to try leatherwork. A wonderful idea ~ Thanks John!