Thursday, February 14, 2008

Hybrid Diagonal 0.96" to 1.25"



The hybrid diagonal I ordered from ScopeStuff is here,
now I can use my 1.25" eyepieces on the edu-science's
0.96" barrel!



Here's a closer look at the well machined metal 0.96"
to 1.25" adapter which can be unscrewed to 3 separate
parts, and can be adapted to any diagonals. I have
to flock the internal barrel to remove some glare.

The edu-science cannot come into focus with this
hybrid mirror diagonal as the scope does not have
enough in focus travel because of the added '1.25" step'
in the adapter.

I removed the metal adapter and use an old celestron
prism diagonal and the scope comes into focus this
time. However, the collimation seems a bit out as I can't
get the image to come into clean focus with the various
eyepieces (including UO orthos).

I switch between the stock/cheap edu-science's diagonal
and the 4mm, 20mm huygen eyepieces and it is sharper
than the hybrid celestron prism/UO ortho eyepieces combination!



I dismantled the old celestron prism diagonal and try
to clean it up and attempt to realign the prism into the
plastic diagonal case. Will see if it works later
tonight. If it doesn't then i may have to try and
get another diagonal to try out or just stick to the
old 0.96" format..ha.

I'm still trying to improve this cheap little 50mm toy scope
from Toy r us! See below photo which i took through the eyepiece
with this little 50mm scope and a 26mm plossl.

Added: The plastic focuser of the edu-science scope is unable to
take the total weight of the 1.25" diagonal & eyepiece causing the
focuser tube to bend causing some collimation problems in the
upper half of the FOV. No wonder the image could not come
into a clean focus.

Have to stick to using the 0.96 accesories for now until i find
a way to shim the focuser tube.



1 comment:

  1. I have a similar diagonal. In what order do the parts go back onto the prism? Black paper, foam, spring, cover? Foam, spring, black paper, cover?

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