USER'S REPORT
September 21st, 2000
Mr.Joe Castoro (New York)

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Above photo is the bino-telescope Mr Joe Castoro made with the EMS .


These EMS units by Tatsuro Matsumoto are a fine piece of craftmanship.
The man takes pride in his work and it shows. After looking at these
units when they first arrived, I thought their appearence was closely
ressembling product received from Pentax or Canon. As a matter of fact
as part of the adjustment process on the bino units, a Pentax Helicoid
unit is used. The EMS units use all mirrors, no prisms - therefore no
light loss or added color.

There are more adjustments to attend to than a binoviewer. The end
result blows a binoviewer away. The visual 3D effect is only hinted at
in binoviewers. Here in the binoscopes it's very attenuated ! The moon's
crater walls jump at you with detail. You are actaully looking down both
sides of the mountain ranges. The amount of information your eyes see is
probably amplified by a factor of three over simple binoviewers. Not to
mention you have much greater light gathering ability; but the same
resolution of a single scope. You would think after looking through the
the binoscopes that your resolution had just gone way up, though it has
not. When looking at the Sun in white light, the binoscopes were very
impressive. The sunspot group coming into view on the limb actually
showed a depression. We thought this to be an optical illusion; but too
many people saw the same view. We cannot explain it. It surfices to say
the solar white light view was the best veiw I ever had of a stellar
object so far. I expect the moon's views to be superb also. Then next as
the moon sets, I will try clusters and extended deepsky objects next;
but I really think these bino ( EMS ) units will perform their best on
the planets.

SETUP:

The Bino backs just slip into the 2" back of your focuser. You first
have the interpupillary adjustment which is done by moving the Pentax
Helicoids on each rear EMS unit. On the right Bino unit there is an
ALTaz ajustment for correction in the x-y plane and next you need to
correct in the rotational or axial plane. For example in the left
eyepiece there might be a telephone pole that is placed 6 to 12 o'clock.
But in the right eyepiece that same pole might be 11 to 5 o'clock. There
is a rotation portion of the bino back that handles this adjustment. Of
course the two scopes must be parallel and the bino backs must be
parallel also. Once you place them into the focusers, you must align
them with respect to one another. The scopes must be close to the same
focal length for the same power, the eyepieces must be the same and you
make all adjustments at medium to high power at infinity.

Is it easy to align them or does precise alignment not matter ?

The above process is really more simple than it sounds. I can be
setup and running, now that I know the procedure, in about 5 minutes for
equipment setup and another 5 minutes for alignment. After that each
person that looks through the scopes has to adjust for their own
interpulliary adjustment and re focus.

I can recommend these EMS bino units to you if your
considering the purchase. It is the ultimate binoculars for those who
want the ultimate view. The planets are now up and I am about to start
evaluation of the planetary views shortly.

Joe Castoro
Coram, New York

PS: Anyone who wishes to contact me can do so at: astrojoe@erols.com









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