Question about Tiffen wide angle filters

[crgibson]

With Tiffen wide angle filters not having front threading, is there still a lip to attach the lens cap to?

[steven]

I don't think so.
Don't have tiffen but other filters I have that don't have front threading you can't attach the cap to.

[Jon]

My Hoya thin filters came with a slip-off lens cap. I imagine the Tiffens also will.