Reverse caps for lens hoods
Reverse caps for lens hoods
The reverse-threaded cap is 48mm thread diameter. If you're using the threaded 48mm Series VII adapters for the 85/2.0, 85/1.9, or 135/3.5 hoods, you reverse the hood (and adapter) for storage over the lens, and then thread the reverse hood cap over the adapter. Very handy.
There is also a rarer 40mm reverse threaded cap for the 135/4.0 hood and adapter.
Even rarer (I need one) is the 34mm reverse threaded cap for the 135/3.5 hood!
There are also earlier reverse caps that are not threaded, they are like the normal lens caps but are 4mm larger. They fit over the slip-on 42mm and 50mm adpaters. For instance, the 44mm cap shows up periodically, and would be for the reversed hood on the 135/4.0.
Interesting... I know about the 48mm caps, I have several of them, but only one of the 34mm. I don't have any of the 40mm. I wasn't aware of the existence of the unthreaded slip-on caps, at all. These caps are very similar to the ones used by Nikon on their early lenses. I have the set on the excellent 135/3.5 screw mount Nikon, but it is designed with a push-lock cap, rather than a threaded one.
I'd love to find the other caps I'm missing.... always something extra.
Thanks, John, for the explanation.
Harry