Vented step up adaptors?

[silvalis]

Has anyone ever seen any vented step up adaptors?

I've got a Nikon 77mm CPL-II from my dslr days and started thinking about using it on my R3A. I'd need a 39 or 43 - 77 step up adaptor, but all of the adaptors I've seen and have are solid. It strikes me, if the adaptors were vented like the hoods are, you could peek through a corner of the CPL through the RF and adjust the CPL properly.

I might attempt machining out vents in an adaptor, but was wondering if you can get them anyway.

 

[Roger Hicks]

I 'vented' adapter rings for system filters with a Dremel, in order to be able to see the settings on LF lenses. The same should be feasible for your purposes.

No, I've never seen 'em commercially, I suspect for the good reason that you can't tell where a screw-in filter or adapter will stop, so they have to be custom-made. Also, they could invite flare if the sun is over your shoulder (in through the vent, off the filter, into the lens).

Cheers,

R.

 

[pphuang]

I think this might do the trick:

http://www.photoequip.net/

and then click on FilterView.

However, Roger is correct, depending on the light, you can get some unexpected problems with flaring, but for the most part it works very well.

 

[silvalis]

hmm good point about the light.


That filter view thing is pretty much what I had in mind, thanks.