FTn Finder question

Erik D. Herrmann Sr.

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Greetings,
I recently acquired a Nikon F Photomic TN and I have a question about the film speed selector. You have the red arrow that you set the ASA to, then there is the numbers 1 and 2. What are the numbers for? My first thought was for pushing/pulling film, but it's only on the pull side of the scale, i.e pulling 2 stops from ASA400 would give you 100. In my (limited) experience, pushing was/is much more common than pulling.
I've recently gotten back into film photography after a short 40 year hiatus.
Thanks in advance for your input...
 

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jimjm

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Say you're shooting Tri-X 400, to push the film 2 stops, align the "2" next to 400 and the red marker indicates that the meter is now calibrated for 1600. However, these markings weren't intended to facilitate pushing or pulling film, like more modern cameras.

Those marks were originally designed by Nikon to allow meter compensation for different finder screens intended for certain Nikkor lenses. Some screens and lenses resulted in vignetting or darkening of the finder image, meaning the meter would be affected and recommend you use more exposure than needed. Obviously, the film was not affected by changing screens, so the index marks provided a somewhat easier way to determine the compensation needed. The FTn finder manual has an extensive chart showing all the possible combinations and the dial settings needed. If you're using one of the standard screens like type A or K, don't worry about this.

 
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OP

Erik D. Herrmann Sr.

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Thanks for the info and the chart. I was able to download the manual for the photomic finder so I'll have a little reading to do at bedtime
I currently have a type A screen, but I'm thinking about getting a type P. I think I'd like the 45° split.
 

MattKing

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John_Nikon_F said:
Cool, glad you like it. I find myself sometimes holding my FM2n at a 45 degree angle, so I can have the same effect.

-J
Click to expand...
Probably goes well with your kilt
 
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