Give the undercut the uppercut? - Page 2

Davros (Lauren) · #21 09-09-2009, 12:06 AM

I feel your pain, i thought i was the only one this happened to. It only ever happens with my 2 inch EP's and i think my extender doesn't help.

erick (Eric) · #22 09-09-2009, 12:12 AM

Mick, Don speaks about the edges of the compression rings. I read on CN of one person who removed the compression ring and filed the edges smooth and replaced it. I think I would be trying that. Others throw the compression ring away and rely solely on the lock screw (some replacing the metal one with a nylon one).

CoombellKid · #23 09-09-2009, 05:42 AM

I used to get that problem bad with my old GSO low profile plus the fact
that it didn't carrythe weight of my 31mm t5. I swapped it out for a
Feathertouch and the problem is nowhere near as bad as it was if at all.
It also helps if you work out the turns needed on the thumb screws, so
to allow removal of the EP without losing the thumb screw. The thumb
screws are a lil different on a FT. For me 3 turns to remove/install, 5 turns
to remove the 1.25" adaptor.

Cheers,CS

chris lewis · #24 13-09-2009, 06:31 PM

I have the Oberwerk 100mm - 45 degree binoscope with the interchangable E.Ps. [Same as 'Andrews' sells ]. The E.P.s are held in firmly via 2x rubber 'O' rings. However with E.P.s with the 'undercut' the top most 'O' ring does not hold the E.P. securely and this effects collimation as the E.P.s can move around. Frustrating really. On some of my E.P.s I have 'reversed' the barrels.

Chris