Quote:
Originally Posted by sharkbite
Hi Simon - other opinions may differ, and i'm a rank amateur at this - but this is what i have experienced.
My Obs (the driveway) is in a Bortle 5 area, and the nearby streetlight is obscured by a tree.
I did buy a LP filter, and would be happy to sell it to you - but it is a bit useless in my opinion.
It makes no difference to visual, and degrades the signal significantly for photography.
The photos all come out looking too "blue" and i have to up the gain or increase the time significantly.
I reckon keep your money in your pocket.
(prepares for rabid disagreement)
cheers,
P.S. best bang for buck purchase i made was the IR/UV filter....this largely got rid of 'blobby' stars in the photos
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I don't agree with this at all. I have successfully used an IDAS LP 2 filter from suburbia with little to no shift in colour, never had to extend my imaging times beyond my normal times. If you are doing colour calibration as part of your processing routine then it shouldn't matter. The one I was using was designed for astro photography. Never have I used one for visual, even in the city.
Here is one taken using that filter.
https://pbase.com/grahammeyer/image/146425724
And another
https://pbase.com/grahammeyer/image/146017157
If you are imaging from a dark site, it shouldn't be needed anyway, as the dark skies will cut your exposure time, more light from your object will reach your chip, thus reducing the "white out" time related to the back ground light eventually swamping your chip.
