thank you!regarding light pollution filters
regarding light pollution filters
dear all, can i know if LPRs are effective in Singapore? what about ultra high contrast filters, broadband filters, narrowband filters? i'm sort of stumped by all the technical lingo!!! haha..would someone pls advise thank you!
thank you!-
weixing
- Super Moderator
- Posts: 4708
- Joined: Wed Oct 01, 2003 12:22 am
- Favourite scope: Vixen R200SS & Celestron 6" F5 Achro Refractor
- Location: (Tampines) Earth of Solar System in Orion Arm of Milky Way Galaxy in Local Group Galaxies Cluster
Hi,
Have a nice day.
It's does help, but UHC filters will be more effective for nebula in Singapore.dear all, can i know if LPRs are effective in Singapore?
Basically, UltraHigh Contrast (UHC) filter = narrowband filters and broadband filters = LPR.what about ultra high contrast filters, broadband filters, narrowband filters?
Have a nice day.
Yang Weixing
"The universe is composed mainly of hydrogen and ignorance."
"The universe is composed mainly of hydrogen and ignorance." 
depends on what u are expecting out of the filters. they do take out some skyglow, but also take out some starlight. works pretty well on nebulas but not that wonderful for other type of objects. do expect to see more contrast/details on those nebs.
i do own the celestron lpr and the orion ultrablock, and if u ask me, i would tell u to get the uhc/ultrablock instead of lpr for visual use.
also do note that the filter itself is very much like a mirror, it blocks off those unwanted light by bouncing off the filter instead of absorbing the light. so any light source behind u will also be reflected by the filter, do not be surprise if u see ur own eye in the eyepiece. do consider some eyecup or black cloth if ur ob site is quite bright.
~MooEy~
i do own the celestron lpr and the orion ultrablock, and if u ask me, i would tell u to get the uhc/ultrablock instead of lpr for visual use.
also do note that the filter itself is very much like a mirror, it blocks off those unwanted light by bouncing off the filter instead of absorbing the light. so any light source behind u will also be reflected by the filter, do not be surprise if u see ur own eye in the eyepiece. do consider some eyecup or black cloth if ur ob site is quite bright.
~MooEy~
Hey Mooey, I second the option for Orion Ultrablock.
But you must note that ONLY nebulae contrast is enhanced, other objects will be worse.
Weixing gave you the translations between the manufactor's label for the filters. There are essentially these types:
1) Broadband (like LPR, Skyglow, CLS labels)
2) Narrowband (like UHC , Ultrablock, Narrowband labels)
3) Line filters (very specialised filters for seeing a very limited number and type of nebulae. Very specialised wavelength throughput.) (Like OIII, H-beta, H-alpha, Sulphur II, Nitrogen II)
Most line filters are imaging filters. Also you need a large aperture because the line filters cut off a lot a lot of the light.
But all above are only for nebulae only. If you want to see more details in galaxies, you may want to try the Galaxy Enhancement filter or simply get a light bucket.
But you must note that ONLY nebulae contrast is enhanced, other objects will be worse.
Weixing gave you the translations between the manufactor's label for the filters. There are essentially these types:
1) Broadband (like LPR, Skyglow, CLS labels)
2) Narrowband (like UHC , Ultrablock, Narrowband labels)
3) Line filters (very specialised filters for seeing a very limited number and type of nebulae. Very specialised wavelength throughput.) (Like OIII, H-beta, H-alpha, Sulphur II, Nitrogen II)
Most line filters are imaging filters. Also you need a large aperture because the line filters cut off a lot a lot of the light.
But all above are only for nebulae only. If you want to see more details in galaxies, you may want to try the Galaxy Enhancement filter or simply get a light bucket.
Photo Album:
http://www.flickr.com/photos/14113965@N03/
http://www.flickr.com/photos/14113965@N03/
astronomik expensive wor. for visual use, do consider the baader filters sold under the celestron brand, quite easy to tell by looking at the -_-_- pattern on the ring. quite affordable too. another brand to consider would be the orion ultrablock, which is pretty strong for visual use.
if u are interested in a even stronger filter than the narrowband type, the OIII are pretty gd choices too, they might work on lesser objects than the narrowbands, but give even more contrast. one look at m42 thru one of these and u would wan to go buy one. i have look thru the thousand oaks b4, quite gd and somewhat affordable.
do consider the filter size too. some may like 2" filters, i'm a 1.25" guy so my filters are 1.25" and they are alot cheaper. if u are considering astrophotograhy use with those lpr or line filter, u "might" need a 2" to fit those t-adapters.
~MooEy~
if u are interested in a even stronger filter than the narrowband type, the OIII are pretty gd choices too, they might work on lesser objects than the narrowbands, but give even more contrast. one look at m42 thru one of these and u would wan to go buy one. i have look thru the thousand oaks b4, quite gd and somewhat affordable.
do consider the filter size too. some may like 2" filters, i'm a 1.25" guy so my filters are 1.25" and they are alot cheaper. if u are considering astrophotograhy use with those lpr or line filter, u "might" need a 2" to fit those t-adapters.
~MooEy~
I would like to recommend Shunter's UHC. You can reach him at jfcheng200@163.com. The price of a 1.25" version is RMB200 only but its performance matches LUMICON's DEEP SKY FILTER. The 2" version costs RMB480.
Clear skies,
Robin.
Cyclops Optics - QHYCCD, William Optics, Televue, STC & Optolong filters
Free shipping for purchases above SG$250
Robin.
Cyclops Optics - QHYCCD, William Optics, Televue, STC & Optolong filters
Free shipping for purchases above SG$250
