I have two lenses. A Kodak EKTAR 127mm f4.7 and a
Wollensak-Raptar
135mm. F:4.7. From what I have read the EKTAR is the
better lens. I
sent the EKTAR to Paul Ebel for a CLA. The
Wollensak-Raptar looked
fine to me, but I wanted to send it to Paul and have him
test it out.
Paul said that the shutter speeds were off and the 'T'
setting did not
work on the Wollensak-Raptar. The cost of the CLA is not
a huge
concern. My question is, is the Wollensak-Raptar lens
worth saving?
Is there anything special about this lens that it might be
worth
something as a backup or for some other use? Any comments
are
appreciated.
The Ektar is a much better lens. While the Wollensak
Raptar (also sold as the Graflex Optar) is very sharp in the
center of the field it has very excessive coma requiring it
to be stopped down to around f/22 to get anything like sharp
corners even for its normal format. I think the problem is
with the design rather than a quality control issue. I've
observed this problem with both 135mm f/4.5 Raptars and
101mm f/4.5 Raptars.
The Kodak Ektar series is of unusual quality. I've
encountered only one Ektar with which I have had optical
problems. This is a very early 101mm, f/4.5 lens. Actually,
its not at all a bad lens but has too much focus shift
making it unsuitable for use on a range finder camera
although it works fine where it can be refocused at the
working f/stop. I am pretty sure the problem is a small
error in the cell spacing. I have at least three 127mm,
f/4.7 Ektars all of which are very sharp lenses. One is an
early uncoated lens, another is a much later single coated
lens. The performance is similar except that the uncoated
lens has a weak ghost image of very bright objects in the
field. Neither of these lenses has significant focus shift.
I have some other Wollensak made lenses which have good
to excellent performance. For instance, the Tele-Optar
series they made for Graflex are excellent as is the 190mm,
f/5.6 Optar on my Graflex-Super-D. I don't know what is
specifically wrong with the Raptar/Optars made for press
cameras but they are not very good. Nor are the Enlarging
Raptars I've tried.
As far as shutters, the Wollensak Rapax/Graphex is a good
shutter. I don't think it is as rugged as the Kodak
Supermatic. The Supermatic was designed in the mid 1930's as
an alternative to the Compur. Kodak began using them
exclusively when Compur shutters became unavailable on the
outbreak of WW-2. My experience with the Rapax is that they
can be very accurate but have no real adjustments. If the
shutter is way off it one must replace springs and balance
the springs to get it into tollerance. Actually, Kodak
shutters do not have adjustments other than the tension of
the retarder spring. With good springs either shutter should
be reasonably accurate and repeatable but factory adjustment
was in the form of filing and swaging the speed cam,
something you want to avoid if at all possible. Wollensak's
original business was shutters and they made quite good
ones. Their lenses are highly variable.
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Richard Knoppow
Los Angeles, CA, USA
***@ix.netcom.com