How to set ISO settings in a NIkon F with Photomic T prism?

Vsanzbajo · Jul 7, 2011

I can not figure this out. Please help.

Jeff Kubach · Jul 7, 2011

As I as I know ASA is equal to ISO.

Jeff

Vsanzbajo · Jul 7, 2011

I know that, but I do not how to set ISO in the camera with the prism on it.

2F/2F · Jul 7, 2011

It is different for each lens, so you need to choose your lens first. Then, look at the lowest f number on the aperture ring, e.g. f/1.4. Whatever that is, you line up the EI with it on the meter. You need to lift the ring to rotate it.

Vsanzbajo · Jul 7, 2011

I have a 1'1.4 lens. EI? What is that? Can you explain step by step, please?
Thanks

2F/2F said:
It is different for each lens, so you need to choose your lens first. Then, look at the lowest f number on the aperture ring, e.g. f/1.4. Whatever that is, you line up the EI with it on the meter. You need to lift the ring to rotate it.

Sirius Glass · Jul 7, 2011

Use the box speed of the film [ISO, ASA ...] as the EI. EI is the Effective Index which for now use the ISO. You can learn about EI later if you want to use a variant of the Zone System [ZS]

Look for a manual at http://www.butkus.org/chinon/nikon.htm If you find what you need please remember to send him the $3.

Steve

2F/2F · Jul 7, 2011

EI is the number that you put into your exposure calculations or light meter. In other words, it is how you "rate" your film.

Box speed is box speed because it works for an average shooting in average conditions. It should get you a usable image, though usually not "ideal," most of the time, so I'd start with that for your EI.

Grif · Jul 8, 2011

http://www.butkus.org/chinon/nikon/nikon_f_photomic_t_finder/nikon_f_photomic_t_finder.htm

Just in case you don't know about butkus, and didn't have the chance to look at the manual

Oops,,, somebody beat me

John Koehrer · Jul 8, 2011

Lets another whack =)
ASA/ISO is the film manufacturers rated speed for a given film. IE: Tri-X=400.

EI is Exposure Index, a film speed rating different than the manufacturers.
Usually found by testing your exposure/development techniques to find an exposure that gives the results you want. Usually a full range of detail, but not necesarily, you may want higher or lower contrast or a more or less dense negative.
The NikonTn meter has a series of maximum apertures on top of the SS dial. To set the ASA/ISO. You set the max aperture of your lens to the appropriate mark on the dial.
This needs to be changed when you change to a lens with a different maximum aperture.
Because this is the manufacturers rating, it not EI but is ASA/ISO.

fstop · Jul 8, 2011

Lift the ring and turn it.

Vsanzbajo · Jul 8, 2011

And line it up to what? The 1.4 aperture of my lens or the red mark? They are very close to each other.

brucemuir · Jul 8, 2011

The red dot on the shutter speed dial is for an f/1.2 lens or if using a lens with no aperture prong.

Vsanzbajo · Jul 8, 2011

So the I align it with 1.4, right? That is my lens aperture.
Thanks

fstop · Jul 8, 2011

I'm going to have to take my digital camera out and shoot pics of the analog camera? The ASA setting has absolutely nothing to do with the lens speed.

brucemuir · Jul 8, 2011

fstop said:
I'm going to have to take my digital camera out and shoot pics of the analog camera? The ASA setting has absolutely nothing to do with the lens speed.

Actually YES, it does on a Tn finder...
you must index the max aperture to the meter by way of the asa dial.
It works differently than the FTN and later photomic heads.

2F/2F · Jul 9, 2011

fstop said:
I'm going to have to take my digital camera out and shoot pics of the analog camera? The ASA setting has absolutely nothing to do with the lens speed.

Please do post said pix that prove your statement, since it goes against common knowledge of Photomic heads.

How to set ISO settings in a NIkon F with Photomic T prism?

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