Buying an OIII filter - which ?

[Starkler (Geoff)]

Any suggestions as to which OIII filter to get and best price would be much appreciated

Main purpose is for blinking planetaries. My preliminary research suggests that the Astronomics has a quite wide passband and that the Baader has about the narrowest. The Baader is $155.

Any better deals around?

[RAJAH235]

Geoff, have a browse here....
http://www.optcorp.com/ProductList.a...05-156-840-854
HTH... L.
ps. You'll find that most, if not all OIII filters have an 11 nanometer bandpass.
http://www.optcorp.com/productList.a...6-840-854&pg=1

[gaa_ian (Ian)]

I like the Astronomics filters sold by bintel as they have very tough coatings to protect the filter surfaces.
http://www.bintel.com.au/Filters.html
I have the UHC.

[Merlin66 (Ken)]

I've been using the Lumicon products for the last 20 years with no issues. Strongly recommend them for quality and service.