OIII filters (or UHC)? - Page 2

iceman (Mike) · #21 10-01-2005, 11:24 AM

How does the Orion Ultrablock differ from the Astronomik UHC though? I don't mind paying a bit extra if it's going to be worth it.

Starkler (Geoff) · #22 10-01-2005, 12:23 PM

something to read

Bear in mind that you can get the orion filter for about half the cost if willing to buy from o/s

You've got me thinking about buying an OIII filter now

iceman (Mike) · #23 10-01-2005, 12:57 PM

hmm good thread Geoff..

So astronomiks is the best but at almost double the price.. Orion Ultrablock is in 2nd place, not quite as good, but still good and much cheaper..

Tough call now..

Orion blocking all the h-beta line, and astronomiks letting a little through.. what will that help me to see? If it's only on a handful of objects is it worth the extra?

or.. as others have said before, buy best quality now and cry just once

Starkler (Geoff) · #24 10-01-2005, 01:10 PM

Realisticly for me, the filter just gets occasional use and a 10% improvement over a 50% saving.............

If you got the ultrablock your still getting a good filter and could put the savings to something more useful like a telrad or a good barlow etc

But hey , its your wifes job to tell you how to spend your money not mine

iceman (Mike) · #25 10-01-2005, 01:18 PM

Quote:

But hey , its your wifes job to tell you how to spend your money not mine

haha

yeh good points Geoff, I think i'll follow with that canadian guy and get the Ultrablock.. as you said, the left-overs can go towards something else!

Astro_Guy · #26 20-01-2005, 03:02 PM

Greetings from the Northern Hemisphere!

There is a great online article on this topic at http://pages.sbcglobal.net/raycash/filters.htm

Please note the test conditions using a 10" Newtonian. The O-III filter is more restrictive than the Narrowband/UHC/Nebustar/Ultrablock, or whatever other variants they have come up with. When buying one's first nebular filter, the narrowband variants are the logical choice. The O-III filter makes sense as a secondary nebular filter for scopes under 8-10" aperture, but begins to make sense as a single filter strategy with larger scopes.

Clear Skies,

Bob

p.s. -7C and snowing here tonight near Philadelphia

Striker (Tony) · #27 20-01-2005, 04:55 PM

Bloody hell....filters are expensive....how am I going to explain them to the misses....

4 filters for $20...she will understand....