Mokusatsu
18-04-2015, 09:29 PM
My Lumicon OIII filter looks fairly normal to reflection, the coatings are clean and intact, but when I look through it (holding it up to the light), the best way to describe what I am seeing is it looks like an agar culture dish with bacteria growing on it, it's like the coating has clumped together into dense grape-like clusters on a relatively clear background.
The image through the eyepiece is dimmer than I remember it being, but it does still make nebulae pop out with high contrast.
For the last ten years it has been unused, sitting in clean and dry storage in the original jewellery box wrapped in bubble wrap, and I don't believe it has been exposed to anything harmful or cleaned improperly.
Is this what happens to these filters eventually or is it faulty, or is this likely to be due to it being improperly cleaned or coming into contact with chemical vapours or something?
Am I just up for a new filter?
The image through the eyepiece is dimmer than I remember it being, but it does still make nebulae pop out with high contrast.
For the last ten years it has been unused, sitting in clean and dry storage in the original jewellery box wrapped in bubble wrap, and I don't believe it has been exposed to anything harmful or cleaned improperly.
Is this what happens to these filters eventually or is it faulty, or is this likely to be due to it being improperly cleaned or coming into contact with chemical vapours or something?
Am I just up for a new filter?