Meade nebular filter
Posted 26 May 2019 - 10:00 AM
Posted 26 May 2019 - 12:06 PM
Posted 26 May 2019 - 12:24 PM
You want this: https://www.meade.co...lar_filters.htm
The filter passes OIII and Hb area then block longer wavelengths until Ha which it passes.
The light pollution bit should get blocked, the page above shows the LP sources as blocked - High and Low Pressure Sodium and Mercury vapour wavelengths.
How well they actually block I do not know. The filter is a fairly standard nebula filter
What you will find is that images will obviously only get the passed wavelengths, so blue/green and some red (Ha). Greens, Yellows, Oranges and shorter Reds will not get to the sensor.
So unsure how to define "greater detail".
What it should do is block the general background and leave the main emission lines and so you get better contrast.
One aspect is that a filter removes stuff, the resultant image is therefore dimmer and the scope you have is slow and the long focal length therefore creates a larger but dimmer image and the filter reduces any image further. For imaging you will need to apply greater care/thought.
Posted 26 May 2019 - 02:33 PM