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E39 Type F filter


sksaito

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If I remember correctly "F type" filter is a bluish filter to use daylight films with tungsten lighting or flashbulbs (=Wratten 80 C); E 39 refers to the diameter and mount (screw) and is a standard used on many Leica lenses - all Summicrons 50 (new and old - DR included) do accept this kind of mount.

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I believe this is the filter for using Type F color film in daylight. If so, it's a fairly pale amber colour and of historical interest only: Type F film was colour-balanced for clear magnesium flashbulbs and hasn't been made for decades.

 

Assuming no damage, it'll fit any 50mm Summicron and many other lenses.

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Just read on Laney : "F type : "F" engraved on ring : conversion filter for Kodachrome or Ektachrome type F in natural light" : E39 type listed by Leitz N.Y. as FKDSMI (1959) A strange code...

 

Strange code indeed - and the reason is that colour correction filters (and this includes Skylight filters) were never made by Leitz in Wetzlar. All colour conversion filters, including the above noted 'F' type, were mounted into Wetzlar-supplied filter mounts by Leica USA. Many of those filters will actually have 'New York' or "N.Y."engraved on the outside of the rim. Leitz New York used different coding system from Leitz Wetzlar. During my film days, I preferred to use B+W or Heliopan colour correction filters, with their much more understandable R and B numbered designations.

 

For the original poster - the E-39 designation stands for a 39mm filter thread (E for screw-in or 'Einschraub' in German). Many Leica lenses from the 50's, 60's and 70's used E39 filters and the 50mm Summicron is of course one of them. However, this filter will be more or less useless today, because the 3200K and 3400K balanced films are just about extinct. The type 'F' filter was an orange filter that corrected the colour balance of films balanced for artificial (tunsten) light to be used in daylight.

 

Best,

 

Jan

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However, this filter will be more or less useless today, because the 3200K and 3400K balanced films are just about extinct. The type 'F' filter was an orange filter that corrected the colour balance of films balanced for artificial (tunsten) light to be used in daylight.

 

The film types were:

Type B: balanced for 3200K pro tungsten lights - now rare

Type A: balanced for 3400K amateur tungsten lights - now extinct

Type F: balanced for 3800k white magnesium flashbulbs - long extinct

Type D: balanced for c. 5500k daylight (and fake daylight such as blue flashbulbs or strobe).

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I have a couple of empty E Leitz NY E39 filter mounts, usually they have gelatin 80B (artificial A or B film to daylight) and 85B (daylight to A or B film) Wratten correction filters in them.

No high speed artificial light film now unfortunately, only slow stuff (and I think that may have gone now) which is good for copying but no good for available light interiors. I have I think a long out of date roll of F type Ektachrome somewhere, kept as a souvenir!

 

Gerry

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