5% off through July 12th. Discount will be reflected in your shopping cart at checkout. New purchases only, not valid on previous sales.
Yes, our inventory is accurate!
Qualifies Towards Free Ground Economy Shipping (CONUS Only) For Most Orders Of $149 Or More
Condition:
This is a Brand New 36mm Astronomik L-3 UV-IR filter. The original jewel box has never been opened, and we haven't opened it, either: see the photos. This isn't "like new"; IT IS NEW.
Save TWENTY-FIVE BUCKS off of the new one!
Description:
Depending on the color correction of your scope you may use a wider spectral window for the Luminance data. The L1 filter has the widest spectral window, the L2 is about the same as our current L-Filter and the L3 is much narrower.
If you use an optical system that is completely free of any chromatic aberration you should get an L1 filter for your setup. For general use the L2 filter is well suited to most optical systems with a corrector, flattener or reducer in the optical train while the L3 filter is designed for users of refractors with a less-than-perfect color correction and in combination with the new Deep-Sky RGB filters, the L3 filter will minimise the problem of bluish halos around stars.
The transmission curve characteristics and coatings on the new Luminance filters have been designed and engineered in such a way that no halos or reflections will be visible. Even with bright stars in the field of view you will be able to reveal the faintest structures in nebulas or galaxies.
Like all Astronomik Filters, the new Luminance filters are made using an extremely durable and scratch resistant coating, deposited on the finest polished optical substrate, which is free of any striae or internal strains. All substrates are made to exactly the same thickness, so all of our filters are parfocal.
