Meade - Series 4000 Colour Filters

Meade Series 4000 filters are a large 26mm in clear aperture and are manufactured from the purest crown optical glass, dyed-in-the-mass - not "colour coated"; there are no finer filters available for telescopic applications. Each filter glass is anti-reflection coated on both sides and is mounted in a machined aluminium cell with the Wratten Number of the filter marked on the side of the cell. Filters may be stacked to achieve selective filtration of the visual colour spectrum

ND 96 Moon Filter (0.9 density; 13% transmission):

The neutral density filter transmits light uniformly across the entire visual spectrum. It serves as an excellent filter to reduce glare and irradiation when observing the Moon with any telescope 4" and larger. The ND96 filter may also be employed in the splitting of close double stars where one of the binary pair significantly exceeds the other in brightness. 

Meade - Variable Polarising Filter

For glare-reduction in observing the Moon the 905 Variable Polariser includes two Polariser filters mounted in a specially machined cell. The 905 permits variable settings of the light transmission between 5% and 25%, to account for varying lunar surface brightness during different phases of the Moon, and the magnification and aperture of the telescope. Accepts 1.25" eyepieces

Meade Series 4000 Broad Band Light Pollution Filter

For an increase in visual and photographic detail in deep-space emission and reflection nebulae. Meade Series 4000 Nebular Filters incorporate the very latest in interference coatings technology. Each filter includes more than 40 coating layers to reject, with precision unwanted light from urban light pollution while passing critical nebular emissions with minimal reduction

Meade - Series 4000 Narrowband Nebula Filters

A great advance for the serious visual observer of emission nebulae. Unlike the wide transmission band characteristics of the Broadband Nebular Filters, Meade Narrowband Filters concentrate on the three most important visible wavelengths emitted by deep-space emission nebulae: the two spectral lines of Oxygen III at 496 and 501nm and the Hydrogen Beta line at 486nm. Virtually all unwanted city light emissions are rejected by factors greater than 99.9%.

Meade - Series 4000 Oxygen III Nebula Filters

Meade Oxygen-III (O-III) nebular filters provide an extraordinary level of nebular filtration on diffuse and planetary nebulae. Observations of these nebulae in a city environment with the O-III filter often yield more image contrast than observations of the same objects in a dark-sky setting without the filter

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