AIflyer011026.pdf

(69 KB) Pobierz
Automatic Indexing Conversions for Nikon Lenses
If you have a newer Nikon body and older Nikon lenses (or vice versa), you may
have encountered an incompatibility in the meter coupling system. The informa-
tion in this flyer will provide you with some background on Automatic Indexing (AI)
and acquaint you with my services.
Although Nikon has been the only the SLR manufacturer to keep its lens mount-
ing system the same over the years, they have updated their meter coupling
mechanisms to keep up with technology and their competition. As a result, there
are now four distinct types of bodies and four distinct types of lenses. I have used the terms
“Old,” “Transitional,” “New” and “Electronic Only” to describe them. The summary on the other
side of this sheet will give you some history on the Nikon system. Basic guidance on compatibility
is in the table below. For details applicable to your situation, see the instruction book for your
body. For photos and other information, please visit my web site at www.aiconversions.com.
Lenses Electronic Only (no New (no yoke):
aperture ring): G
AF, Series E
Bodies
Electronic Only (no meter
No meter with
OK
tab) e.g., N80, N65, N60
non-AF lenses
New (fixed tab) e.g., F5,
Shoot wide open
OK
D1, F100, N90s, FM2n
on non-AF bodies
Transitional (tab flips up)
Shoot wide open
OK
e.g., F4, F3, F2A, FM, FE
on non-AF bodies
Old (pin and yoke) e.g., F,
Old
Conversion C
Shoot wide open
early F2, Nikkormat FTn
suggested
Transitional (holes
in yoke): AI-s, AI
OK but no meter
OK
OK
OK
Old (meter
yoke is solid)
Conversion B
needed!
Conversion A
needed!
Conversion A
suggested
OK
Prices and Turnaround Time:
•
Type A conversion: $25 per lens (so that old lenses can be used on most
newer bodies). See the photo at right.
•
Type B conversion: $35 per lens (same as a Type A conversion but with
additional work so that the lenses can also be mounted on the “Electronic
Only” bodies)
•
For my former customers, the upgrade from A to B is $10 per lens
•
Type C conversion: $25 per lens (installation of the traditional meter coupling yoke on AF or E
styles so that these newer lenses can be used on old bodies with full aperture metering)
•
Return shipping by UPS: $5 for Ground, $10 for 3 Day Select, $15 for 2 Day Air. Note that
these prices are on a per
order
(not per
lens)
basis
•
UPS Next Day Air and other parcel services are also possible but please contact me in advance
•
Turnaround time is typically two or three business days
•
Overnight returns and "rush" work are possible but please contact me in advance
Shipping Information:
•
Wrap each lens separately. Bubble wrap is best. Newspaper is OK
•
Place them in a sturdy box of corrugated cardboard
•
Surround them with at least two inches of Styrofoam "peanuts”
•
Enclose payment and a short note (or order form from my website). Personal checks are fine
•
Send by UPS, if possible. If you use the U.S. Postal Service, ask for Priority Mail
•
Please note: shipments that require my signature may take an extra day or two
Ship the lenses to:
John White, 1350 Folkstone Court, Ann Arbor MI 48105
You may call me at (734) 662-1734 to leave a message. The best time to reach me in person is
in the early evening during the week or during the day on weekends. My email address is
jwhite@aiconversions.com. You may also contact me through my website: www.aiconversions.com
A Brief History of Meter Couplings for Nikon SLR Bodies and Lenses
---------------- Bodies --------------
1959:
The Nikon F was introduced.
Meter coupling was accomplished
by a “pin and yoke” system that
lasted almost through the era of
the Nikkormat (see photo) and the
F2. I have termed these bodies
“Old” for purposes of the table on the other side of
this sheet.
---------------- Lenses --------------
1959:
The aperture rings on the SLR lenses were
equipped with a yoke that engaged a
pin on a prism-mounted meter to
create coupling with the shutter
speed settings. These lenses are
shown as “Old” in the table on the
other side of this sheet.
1977:
The FM and FE series began
1977:
Lenses that were introduced
the era of Automatic indexing (AI).
The Nikon F2 finder was upgraded
to the F2A and the Nikkormat line
was upgraded to the EL2 and FT3.
The meter coupling tab on these bodies could be
flipped out of the way to allow older lenses to be
mounted and used with stop-down metering. These
bodies are called “Transitional” on my table.
1979:
The EM body was offered as the least ex-
to accompany the new AI bodies
continued to be equipped with the
traditional coupling yoke although
the yokes now had holes to let light
through for the new Aperture Data
Readout function. These models are shown as
“Transitional” on the table. From 1977 to 1991, Nikon
would convert the Old lenses to AI configuration by
installing a new aperture ring. Since then, conversion
by modification of the existing ring is your only op-
tion (unless you can find some of Nikon’s old kits).
pensive way to get into the Nikon system. With
this model, the meter coupling tab
was fixed and old lenses could not
be mounted without risk of damage.
The FG, FA, FM2 and FE2 followed,
all with the fixed tab while the flip-
up version continued to be installed
on the top-of-the-line F3 and F4 bodies. Bodies
with the fixed tab are referred to as “New.”
1979:
The Series E lenses that appeared with the
EM did not have the meter yoke but
were the first to have AI-s features
which
allowed
Programmed
Automation using mechanical means.
These models are shown as “New” on
the table.
Nikon’s autofocus era began with the
N2020. This body included electronic coupling con-
tacts as well as the fixed meter coupling tab. Re-
cent examples of this type are the F5, D1, F100
and N90s. These bodies are also termed “New.”
The N4004 was introduced as the least
expensive entry to the Nikon autofocus system.
There was no meter coupling tab and the body re-
lied on the microprocessor in the autofocus (AF)
lenses for metering. Current models of this type
are the N65 and N80. Bodies of this type are
shown as “Electronic Only.”
Nikon’s lens mount has remained the
same for more than forty years. With my conver-
sions and only a few cases of inconvenience, virtu-
ally any body from any era can be used with any
lens. Please refer to your body’s instruction book
or contact me with any specific questions.
AI Conversions by John White
www.aiconversions.com
Printed: 10/26/2001
1985:
1981:
AI-s lenses replaced AI models. They contin-
ued to be equipped with the yoke and are still in the
line today. These models are shown as “Transitional”
on the table.
1985:
1987:
Autofocus lenses were introduced. They
have electronic couplings as well as the AI-s fea-
tures but do not include the yoke. Like the Series E
models, these lenses are shown as “New” on the ta-
ble.
The Series G line of less expensive lenses
began. These lenses do not have an aperture ring.
Meter coupling is solely electronic so they are
meant only for AF bodies. Nevertheless, these
lenses can be mounted and used on all non-AF Nikon
SLRs if you don’t mind metering and shooting wide
open. On the table, these lenses are shown as “Elec-
tronic Only.”
2000:
Today:
Today:
Nikon SLR lenses are classics. With my
conversions and only a few cases of inconvenience,
virtually any lens from any era can be used on any
body. Please refer to your body’s instruction book or
contact me to ask any specific questions.

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin