Filter Optolong L-Pro broadband anti-light pollution 1.25"

Filter Optolong L-Pro broadband anti-light pollution 1.25"

Name: Filter Optolong L-Pro broadband anti-light pollution 1.25"
Brand: Optolong
SKU: OTLOG-L-PRO125
Price: 121.45 EUR
Availability: InStock

Reference OTLOG-L-PRO125

In stock

121.45 130.00 -8.55

VAT excluded Shipping 24/48h

The L-Pro filter, which prevents the passage of artificial stray light, has five pass bands, located in those regions of the visible spectrum in which astronomical objects emit, and has received a highly positive response from amateur astronomers and astrophotographers.

Buy it now and receive it between on Monday, 30 December and Monday, 6 January with Home delivery - International

Delivery Options

Carrier		Description	Estimated Delivery
	Home delivery - International	Home delivery - International	Monday, 30 December - Monday, 6 January

Home delivery - International

Estimated delivery:
Monday, 30 December - Monday, 6 January

✖

Description
Product Details

Filter Optolong broadband anti-light pollution filter L-Pro 1.25"

Product Description

The L-pro filter has five transmission bands (the most of any anti-pollution filter on the market), thus covering more of the visible spectrum to provide more realistic colors. The transmission windows coincide with the OIII, Hbeta, NII, Halfa and SII wavelengths (and other windows where there are no spectral emissions from sodium vapor or mercury vapor bulbs), so the L-pro can be considered a multiview nebular filter. Its filter factor is 1.5 (1.5 times more exposure time than without filter). As a filter that is not overly restrictive, it is the optimal filter for areas with medium light pollution.

The filter is made of optical glass with a flatness level of λ / 4 on both surfaces (the surface irregularities are

The L-Pro has an ultra-clean substrate after passing through 13 ultrasonic and purified water cleaning tanks to effectively remove any remaining impurities and dust.

Its outermost coating with ion-assisted electron beam evaporation deposition technology provides enhanced durability and scratch resistance, as well as CWL (center wavelength) stability unaffected by temperature changes.

All L-Pro undergoes extensive quality control: each filter is individually tested with spectrophotometer and laser interferometer to ensure that its output spectrum and wavelength front is adequate.

Technical specifications:

Peak transmission: T > 90%
Spectral range: 380-750 nm
Optical density: 90% blocking of light pollution
Filter factor: 1.5 (1.5 times more exposure required than without filter)
Spectral windows of astronomical interest: OIII, Hbeta, NII, Halfa and SII
Surface quality: 60/40
RMS of transmitted wavefront: λ / 4
Parallelism (arcsec): 30"
Format: Threaded to the eyepiece barrel
Size: 1.25"

Filter Optolong L-Pro 1.25" broadband anti-light pollution filter

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