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TV Plossls vs. UO Orthos

Started by mkawada, 08/24/2002 05:57PM
Posted 08/24/2002 05:57PM Opening Post
Putting price asside, do TV Plossls beat UO Orthos?
Posted 08/24/2002 09:31PM #1
Axial fidelity (contrast, sharpness)? No. Not saying UO's are superior -- just that Tele Vues don't beat them.

Field-edge correction in faster scopes? Probably (though not blatantly). I recently had the chance to view the Helix Nebula via Tele Vue 32mm and an f/5 Starmaster. Awesome field, axis to edge.

Best wishes and luck.
-Dan
Posted 08/25/2002 12:35AM #2
They are both excellent, especially in slower scopes. However, the TVs have a field lens baffle not found on the UOs ("Circle T"). Finish quality favors TV, hence the higher price. UOs are the better value in a true Abbe ortho. Contrast is better for me with the TVs and a binoviewer, so I have two complete sets. I put faucet washers in my UO pairs for baffling.

I like the UOs because they share a direct lineage with my first quality EP purchase in 1971, an Edscorp 6mm Ortho.