H beta filter

Moderators: Sam, Sean.Wang

H beta filter

Postby sk_alex » Sat Dec 16, 2017 10:20 pm

Hi, do you plan to offer a H-beta filter (app. 486 nm bandwidth)?
It is usable for imaging some DSO since it is in the "blue" part of the visible light spectrum. You already have SII, H-alpha and OIII NB filters, so this H-beta could further extend the narrowband imaging options.
Other major companies offers such filters but it will be much better if ZWO has their own filter that is panoptical (with same focus) with other ZWO filters.
Best regards, Sasho
sk_alex
 
Posts: 1
Joined: Sat Dec 16, 2017 10:12 pm

Re: H beta filter

Postby riklaunim » Mon Dec 18, 2017 5:21 pm

H-beta is a visual filter. There is no reasons to use it for imaging - this shorter wavelength is affected by moonlight and seeing more than H-alpha wavelength, plus the H-alpha emission is much stronger than H-beta (not to mention that some nebulae are actually emitting more [N-II] light than hydrogen emission lines - and that is covered by H-alpha filter).
riklaunim
 
Posts: 484
Joined: Tue Dec 31, 2013 6:15 pm

Re: H beta filter

Postby Sam » Mon Dec 25, 2017 12:00 pm

riklaunim wrote:H-beta is a visual filter. There is no reasons to use it for imaging - this shorter wavelength is affected by moonlight and seeing more than H-alpha wavelength, plus the H-alpha emission is much stronger than H-beta (not to mention that some nebulae are actually emitting more [N-II] light than hydrogen emission lines - and that is covered by H-alpha filter).


thanks for the reply
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China
User avatar
Sam
 
Posts: 2480
Joined: Thu Feb 21, 2013 2:51 am


Return to Feature Requests

Who is online

Users browsing this forum: No registered users and 1 guest