Hi, the Sinarsix does not meter though the groundglass but rather at
the image plane. In Ansel Adams revised "The Camera" there is a
picture of it on page 66 where it is cited as a useful device for checking
the aperture markings of lenses as they can often be off.
I set up lights and grey card to check the 120mm/8 Nikkor SW. The
last mark is f/64. But it stops down a full two stops more. It's good
to know. I"ll be checking the apertures of my other large format
lenses as well.
Best. Rich
On Thu, Aug 18, 2016 at 7:51 AM, Luis Miguel Castañeda <octabod@xxxxxxxxx>
wrote:
Sinar had an attachment for gossen meters, but iirc it metered in the
inner side of the ground glass. The only advantage for such cumbersome
methods in general photography was the independence of bellow factor
El 18 ago. 2016 4:47 p. m., "Robert Hall" <robert.g.hall@xxxxxxxxx>
escribió:
Would you imagine the need to calibrate it based on the particular ground
glass you have in the camera?
Robert Hall
www.RobertHall.com
www.RobertHall.com/workshops
www.facebook.com/robert.g.hall
On Wed, Aug 17, 2016 at 3:16 PM, Richard Lahrson <gtripspud@xxxxxxxxx>
wrote:
Hi folks! For some time, I"ve wanted to meter through the camera
at the film plane for large format. I have a Luna-Lux SBC (silicon blue
cell)
meter with the accessory fiber optics probe. The probe attachment
is good for measuring small objects via reflected light (though a spot
meter, which I also have is better). The probe attachment also works
with the older Lunasix. The probe is supposed to work with measuring
at the groundglass. I tried it, but the problem with keeping the probe
on the glass, holding the meter and keeping the light out with the
dark cloth,,,you get the picture. I gave up.
There are three other alternatives: the old Sinarsix, the newer meter
probe also from Sinar that attaches to a couple of more modern
meters. Both these alts measure selectively. There is also
a Horseman(?) attachment which measures 4x5 but full frame.
The Sinar models measure an area 7X9mm. The probe can be moved
anywhere in the 4x5 area. I did not buy the newer Sinar probe largely
because of the whimpy cord connection for the probe.
I bought the original Sinarsix and got all the accesories including the
2 extra dials for reciprocity failure, the manual and the 5x7 cassette
with case and keys! Took a chance on the eBay with no returns.
The only missing item is the 8x10 intermediary frame that allows
use of the 5x7 cassette on the 8x10 format. If anyone happens to
have the intermediary frame lying around, let me know!
The unit fired up after removing the mercury battery and replacing it
with the Wein air cell! The problem with the old Sinarsix is the
Cadmium sulfide cell which can retain a memory if you are not
careful.
The Sinarsix takes the guesswork or math out of bellows extension
and will handle filters up to 2X exposure and check for light falloff
with wideangle lenses and camera tilts and swings. The manual is
informative and clear. I'm still working my way through it!
Rich
