Practical Hints
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4. Exposures with filters
The thread of the lens 4 or the lens hood mount takes a
●30.5 x 0.5 for Sonnar lensed models (35S / 35SE)
●24.0 x 0.5 for Tessar lensed models (Original 35 / 35T)
Filters mostly require an exposure correction. Its value is engraved on the filter mount. This indicates the number of stops by which the aperture has to be opened (towards lower f/numbers) or the exposure time increased .
For example if the measured aperture is f/11, and the filter correction value
If you want to correct by increasing the exposure time, moving the shutter speed dial from one value to the next corresponds to a full exposure step correction. Half steps can only be allowed for by intermediate aperture settings.
Filters for black and white shots:
Medium yellow filter: (exposure correction
Orange filter: (exposure correction
Filters for colour shots:
Filter UV and colour conversion filter R 1.5: (these require no exposure correction). They subdue blue casts which can arise on cloudless days through the predominant blue skylight, especially in distant views. With some reversal colour films a warmer overall rendering may be desirable. In that case the R 1.5 filter may be used for all shots.
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All this informations, texts, and Images were extracted from the "Rollei 35/35T/35S In Practical Use" and only intends to give some orientation to new users that didn't had access to the original manual. (c)