If you are already registered, please log in.
Create your account with Telescopes Canada.
Your cart is currently empty.
Zoom the image with the mouse
We will notify you when this product becomes available.
Ask a Question About This Product
The Optolong Clear Focusing Filter is designed to pass the visible spectral region (420nm-680nm) with 98.5% transmission
Use of astrophotography filters, especially narrowband filters, often results in dim images which can be difficult to focus. Clear focusing filters can be used first to clearly focus the image.
Acts as an outstanding dust shield, which prevents the possibility of dust settling on the lens during long time exposure.
WARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.
Please click here for the complete shipping, returns and refunds policy
Be the first to ask a question about this product
is added to your shopping cart.