JPD,
Nice example shots. Is one of the styles you show preferred over the other or do they both work well?
I have a push on 28.5mm yellow filter ordered and will be here this week. I am asking help here before I order the hood since it appears either style will work.
Do you have a preference?
Remember that this type of filter can only be used together with the clamp-on lens hood:
Dead Link Removed because the outer diameter is much bigger (36 mm) I think they made the filters that way so that they would not vingette when you're shooting wide open with the 3,5 Tessar.
The Rolleiflex Standard has a "peg" that fits the "notch" on the clamp-on hood so it can't rotate.
I've had no problems with the push-on hood and "normal" 28,5 mm filters, though. I've used them with both the Rolleiflex Standard and Rolleicord I (Art Deco).
The Rolleiclub link below has great info on these cameras and is usually accurate, but it lists the filter as being screw on, which I don't think is true.
The thread on the lens mount is only for the retaining ring for the front element, and it's not 28,5 mm. That site has a few errors here and there. They also use the weird naming of different camera models that some collector came up with, like "Rolleicord IId". There is no such model. "Type 4" or "fourth model" would be more correct.