Filters for Mutar Wide Angle .7x

[ned_otter]

Greetings to all,

 

I have a Rollei 3.5F with a Mutar Wide Angle attachment. In looking

through old Rollei literature/price lists, I see there were filters

available for the Mutar, i.e. Yellow/Green/Red, etc.

 

Does anyone know what size these filters were/are? I'm trying to

determine if the Mutar can be fitted with modern filters.

 

Thanks in advance --

[robert meier]

I think it takes regular 67mm filters.

[ned_otter]

One further thought - if a modern-day filter could be fitted to the Mutar, would it have to be the "extra-wide" type in order to prevent vignetting?

 

The Mutar on a 3.5 Rollei has a very slight amount of vignetting in just the tips of the corners. It's not really a big deal for me.

 

I'm just wondering if others have any experience with this kind of setup.

 

Thanks--

[bengt1664878721]

According to Heering's Das Rollei-Buch the Mutars take "aufschraubbare Spezialfilter mit 67 mm Durchmesser" - he doesn't explain what's so special about them, though.

 

According to Heering, with the wide angle Mutar (0,7 x), stopping the lens down to 5,6 will yield an optical quality comparable to the 55 mm Distagon wide open. The angle of view with the 75 mm lens is increased from 56 to 72 degrees. (The "fall-off" in illumination caused by the Mutars equals a half stop.)

 

"Zeiss-Qualität und -Präzision". Man, I wish I had one.

[ned_otter]

Bengt- thanks for the response. That's the first time I heard of the Mutar requiring additional exposure. But since my 3.5F doesn't have 1/2 stops, it seems I'll always be a bit off. Obviously not so critical for print film, but for slide film it could be an issue.