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Series VII Filter


ganzosrevenge

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Hello Ganzosrevenge,

 

The idea of a UVa filter is to remove the invisible to people Ultra Violet rays from the light striking the film surface so that the film which IS sensitive to Ultra Violet light rays will not record these rays as additional blue in the image.

 

Meaning: No, or less, color cast. As opposed to the same photo taken without the filter.

 

The image that is produced will appear more like the scene the photographer was looking at than it would if the excluded Ultra Violet rays had been included.

 

Best Regards,

 

Michael

Edited by Michael Geschlecht
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Hello Ganzosrevenge,

 

The idea of a UVa filter is to remove the invisible to people Ultra Violet rays from the light striking the film surface so that the film which IS sensitive to Ultra Violet light rays will not record these rays as additional blue in the image.

 

Meaning: No, or less, color cast. As opposed to the same photo taken without the filter.

 

The image that is produced will appear more like the scene the photographer was looking at than it would if the excluded Ultra Violet rays had been included.

 

Best Regards,

 

Michael

and what about the IR part?

 

The IR cut part was the interesitng part

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Hello Ganzosrevenge,

 

The idea of a UVa filter is to remove the invisible to people Ultra Violet rays from the light striking the film surface so that the film which IS sensitive to Ultra Violet light rays will not record these rays as additional blue in the image.

 

Meaning: No, or less, color cast. As opposed to the same photo taken without the filter.

 

The image that is produced will appear more like the scene the photographer was looking at than it would if the excluded Ultra Violet rays had been included.

 

Best Regards,

 

Michael

The problem being that UV is normally blocked by the lens, at least by post-1960 designs, so you will not see any difference, except with exceptionally high levels of UV. Like over 10.000 feet in the mountains.

Normal film is not -or hardly- IR sensitive, so an IR cut filter is not useful for film and may alter the rendering of red colours.

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Are they drop in and work with the filter ring lock on the old lenses?

I have some old Leica Series VIII contrast filters and current B+W Protector, both brands are mechanically identical, I assume same applies to Series VII - smooth metal ring that require some sort of external retaining device, either ring or lens hood, to fix filter to the lens.

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Series VII = 48mm screw-in; filters sizes are interchangeable.  Lots of options.

 

I'm afraid that is incorrect. No series filters were screw-in and the VII were not 48mm, but non-threaded 50.8mm which required a 54.4mm screw-in adapter.

Edited by pico
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I have found the following table in the Internet.

Series VI is correct with 44mm.

Of course the mentioned thread is the one of the retaining ring (male) and of the lens (female). The filter itself has no thread.

The pitch of the thread differs from the modern E-filters, otherwise it would be too simple.

The retaining rings can be found cheap at Ebay. But not new, modern (coated) filters.

Jan

 

>SERIES IV 13/16" 23mm filter threads 

>SERIES V 1 3/16" 34mm filter threads 
>SERIES VI 1 5/8" - 44mm filter threads 
>SERIES VII 2" 55mm filter threads 
>SERIES VIII 2 1/2" - 65mm filter threads 
>SERIES IX 3 1/4" - 85mm filter threads 
>SERIES X 4 1/2" 114.3mm ? 
>SERIES XI 5 7/16" 138mm ? 

This is the thread diameter. I don't know what the pitch (threads per inch or threads per mm) was. I have heard that is was different than the standard threaded filters of today. 

Edited by jankap
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  • 2 weeks later...

The filter thread is close to E54. Most of the UV have no threads - needs a retainer ring to hold in place. Good linear polarizers which screw in directly(no retainer rings) are very easily available.. 

 

filters that directly screw are available but very few step up adapters to let you use new higher size filters. Heliopan has a 54-58 step up (or is down) adapter. I am still waiting to receive it. I want to use 77mm filters on the Leica R 90/2.8. 

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  • 1 year later...
On 1/22/2018 at 9:54 PM, pico said:

 

I'm afraid that is incorrect. No series filters were screw-in and the VII were not 48mm, but non-threaded 50.8mm which required a 54.4mm screw-in adapter.

What he means is that a lens that takes a series 7 filter will also take a 48mm screw in filter.  This matches my experience.  When I possessed lenses that took a Series 7 filter, there was screw in filter equivalent, and it was either 46mm or 48mm.  I forget exactly, but he's correct.  You don't always need a retaining ring and separate filter.  

Edited by SteveYork
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17 hours ago, SteveYork said:

What he means is that a lens that takes a series 7 filter will also take a 48mm screw in filter. [...]

True for some lenses (21/3.4 # 11103; 28/2.8 # 11801), less so for others (35/2 # 11309: S7 or E39; 35/1.4 # 11870 & 11871: S7 or E49 upside down in the hood; 135/2.8 # 11829: S7 or E55)...IINW ;)

 

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Hello Everybody,

The 54.4 mm retaining ring (Thank you Pico.) that holds a Series VII filter on Leitz lenses is a  14161.

If you find it as originally supplied on a lens it is most likely marked "Canada". If it has been ordered separately it is most likely marked "Wetzlar".

"Most likely" because with many things Leitz/Leica: There are exceptions*.

Best Regards,

Michael

* That is 1 of the reasons that someone invented Leitz/Leica Collectors.

Edited by Michael Geschlecht
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