Nikon F Prism Accessories
SF-1 Ready Light Adapter
- Nikon Description:
Fits the eyepiece of the Nikon F and Nikkormat cameras. In this way, you can determine
speedlight readiness without removing your eye from the viewfinder; you can compose
and focus while the unit is charging and be ready to fire when the pilot light comes
on. The pilot lamp goes out after firing, indicating that the speedlight has fired.
This accessory consists of an adapter that screws into your
eyepiece and two cords coming off the adapter's left side: the top one is connected
to your camera's PC socket, and the bottom one has a pronged plug to go into your
speedlight. Thus it also handles camera-flash sync, obviating the need for the SC-5/6/7.
DL-1 Photomic Illuminator
- The DL-1 is a simple device designed to cast light through
the meter-needle illuminating window on top of Photomic prisms. It attaches to the
eyepiece via the threaded mount, and has two controls, on (on the side) and off (on
the top) which operate in the same way as the Photomic FTn's on/off: pressing the
"on" button into the DL-1's side pops the "off" button out, and
vice versa. It is powered by a single PX-13 mercury battery (although you can probably
use the alkaline replacement without much deleterious effect).
- Very old diopters slip over the rectangular eyepiece found
on most eyelevel finders. Newer diopters use the standard thread system found on
F Apollo and later cameras, as well as most of the Photomic finders.
- Nikon says that their prisms have a built-in diopter of -1,
and the rating of the added diopter (+5, -3, etc.) is the diopter power of the combined
diopter and prism eyepiece. Thus, a -3 diopter is, by itself, a -2 lens.
- This is a fairly simple device which screws into the eyepiece
and provides 2x magnification of the center of the view. It flips out of the way
when not needed. The truly excellent added bonus is the built-in diopter correction
from -4 to +2 (which acts just as an added diopter, so the total correction, with
the prism's built-in correction, ranges from -5 to +1). Yes, I watched Bill and
Ted's Excellent Adventure last weekend.
Right-Angle Viewing Adapter
- As implied, this also screws into the eyepiece and allows
you to put your eye at right angles to the lens's axis. It is most useful for low-ground
work, when the alternative would be to lie flat on the ground and peer through the
eyepiece. The earliest versions have dioptric correction for diopters -5 to +3, although
the later DR-3, which is compatible with threaded F prism eyepieces, offers a lockable
- Like virtually everything else, it screws into the eyepiece.
It was designed to mask out stray light and improve finder contrast. Presumably,
you can use a more modern replacement if necessary. One thing to consider is that,
as the metering system is in the prism, stray light entering the finder through the
eyepiece may influence the meter reading.
Accessory Eyecup Adapter
- Most Nikon F's with the eyelevel prism will have the rectangular
eyepiece, to which fairly few accessories can be attached. This adapter changes the
attachment method over from a slip-on bit to a screw-in socket (and then you can
use most anything manufactured for Nikon standard-sized eyepiece up until 1982 (when
the HP DE-3 appeared).
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