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Old 14-08-2014, 06:33 PM
malau (David)
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Join Date: Sep 2013
Location: Sydney
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Quote:
Originally Posted by Tony_ View Post
G'day,

I have a few questions regarding imaging in light polluted skies (of course dark skies would be the best option - but not practical for me):

Given all things being equal (eg. exposure times etc.) what is the best way to handle general light pollution (I use a modded dslr):

1. Use a custom white balance (eg. white paper photographed in sunlight). (or other custom white setting)?
2. Use a LP filter (I have a Hutech IDAS).
3. Other settings in camera?
4. Use nothing and balance the colour in processing?

Also in regards to LP filters I have read 2 theories on exposure times, which one is correct?

1. Light Pollution filters basically remove light therefore the exposure time will need to be longer.
2. Light Pollution filters remove mostly (hopefully) unwanted background light which improves the contrast for the wanted light, therefore exposure time is decreased.

Thank you for any input.

Regards,
Tony.
Hi Tony,

I have a 600D with Astronomik CLS filter for LP. I am a beginner so my info may not be 100% correct. However as far as I understand filters (including narrow band) are filtered out certain wave length of light (depending on your filter purpose) therefore those not filtered out (e.g. the light from star) still be able to pass thru. For your question I guess #2 (for both) is correct



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