Usually ships in 4-8 weeks
An order for this can be placed with our supplier, and usually ships within the specified timeframe.
or 12 months interest free
or 4 easy payments of $174.99
or 4 easy payments of $174.99
×
ORDER NOW
ENJOY NOW
PAY LATER
Pay it in four interest-free payments
At checkout, select Afterpay as the payment method
No new cards, you can use your existing bank card
Complete your checkout
No long forms, online approval
Pay over four installments
Pay every 2 weeks, enjoy your purchase right away
All you need to apply is to have a debit or credit card, to be over 18 years of age, and to be a resident of New Zealand or Australia
Late fees and additional eligibility criteria apply. The first payment may be due at the time of purchase. For complete terms visithttps://www.afterpay.com/terms
We don't have this item in our store right now, please allow for it to be transferred to our retail store.
If you come to pick up your order please bring photo ID, if someone else is picking it up on your behalf please contact us prior to pickup.
Delivery estimates
Once your order has been picked up by the courier please allow 2 working days for North Island addresses, for the South Island allow 3 working days. Rural deliveries and extra-large items may take several additional days.
Shipping costs
Shipping costs are automatically calculated during checkout. The price of shipping varies based on the delivery location. Select items may be be eligible for free shipping.
Delivery of oversize items
Oversize items such as very large telescopes may only be available via pickup from a depot or delivered to a business address. For a map of available depots, click here. Due to less frequent collection of oversize items delivery may take 2 to 4 additional days.
Security
To ensure the safe delivery of your order we require a signature with all parcels. Some exceptions may be made if you give the courier company authority to leave parcels at your preferred address.
About this product
Light pollution in the night sky can significantly degrade contrast in astronomical images. This is especially true when using very fast telescopes like the 8” RASA because the sky background saturates very quickly. The “noise” of the light pollution overwhelms the “signal” from the celestial object you are imaging, making it difficult to get the most detailed image. The Light Pollution Imaging Filter for the 8” RASA remedies this by blocking light pollution while transmitting light from deep-sky objects. The result is bright, detailed objects that pop off the black sky background with superior contrast.
Fortunately, many sources of light pollution have relatively discreet emission spectra; they emit primarily at specific wavelengths of light. By strategically blocking these wavelengths, the filter greatly reduces the effects of light pollution without degrading overall image quality.
The Light Pollution Imaging (LPI) Filter for the 8” RASA blocks light from some of the most common sources of light pollution between 400-700nm (i.e., the visible spectrum), including high- and low-pressure sodium-vapor streetlights, mercury-vapor streetlights, and natural airglow caused by oxygen in the atmosphere. Unlike some light pollution filters, the LPI filter blocks only specific areas of the spectrum instead of wide regions. This helps to maintain image brightness and color balance. In addition, specific wavelengths associated with emission nebulae, such as H-α(656nm), H-β (486nm), OIII (496nm and 501nm), and SII (672nm), are highly transmitted, ensuring minimal loss of image brightness for those objects.
The filter fits directly into the internal filter mount in the RASA 8’s front lens cell, where the optical window normally mounts. By removing the clear window and replacing it with the filter, optical performance for the entire system is maintained.
Each filter comes with a plastic storage case to safely store the filter or the placehold