Skip to content
Due to the USA–China tariff escalation, we will temporarily not receive additional inventory for Celestron and Sky-Watcher products. As a result, we are unable to accept orders for any out-of-stock items and encourage you to take advantage of the products currently in stock while supplies last.
Due to the USA–China tariff escalation, we will temporarily not receive additional inventory for Celestron and Sky-Watcher products. As a result, we are unable to accept orders for any out-of-stock items and encourage you to take advantage of the products currently in stock while supplies last.
Optolong UHC Filter

Optolong UHC Filter

by Optolong
SKU OPT-UHC-1.25
$0
$55.00 USD - $115.00 USD
$55.00
$55.00 USD - $115.00 USD
$55.00 USD
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 1 is in stock!
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 1 is in stock!
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 1 is in stock!
Availability:
Backordered
Contact us to know when we will receive our next ones!
Check the other options, 1 is in stock!
Availability:
1 in stock

International Shipping

More information

Optolong UHC with narrower passband provides higher contrast. Thus it is more suitable for urban environment where you suffer from severe light pollution.

Introduction

The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

Main Use and Performance

Suitable for color CCD cameras and unmodified DSLRs.

UHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.

UHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42).

Light pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

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.

Technical Data

Substrate: optical glass
Tave>95%
Blocking range: 300-700nm
Blcoking depth: OD3, light pollution line blocking >99%
Surface quality: 60/40 (Refer to MIL-O-13830A, MIL-C-48497A)
Transmitted Wavefront RMS: ¼λ
Parallelism: 30s

Customer Reviews

Based on 1 review
100%
(1)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
A
Andrew Rae

Good, no issues

You may also like

  • $239.00 USD - $304.00 USD
    $239.00 USD - $304.00 USD
    $239.00 USD - $304.00 USD
    $239.00 USD

    Optolong L-Extreme Filter

    Options available

    L-eXtreme is a two 7nm bandpass filter which can be used with one-shot color cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is a...

    View full details
    $239.00 USD - $304.00 USD
    $239.00 USD - $304.00 USD
    $239.00 USD - $304.00 USD
    $239.00 USD
  • $389.00 USD - $389.00 USD
    $389.00 USD
    $389.00 USD - $389.00 USD
    $389.00 USD

    Optolong L-Ultimate Filter

    OPT-LULT-2

    It's about a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae's emissions into H-Alpha (red...

    View full details
    $389.00 USD - $389.00 USD
    $389.00 USD
    $389.00 USD - $389.00 USD
    $389.00 USD
  • $665.00 USD - $1,009.00 USD
    $665.00 USD - $1,009.00 USD
    $665.00 USD - $1,009.00 USD
    $665.00 USD

    Optolong LRGB, Ha, OIII & SII Filter Set

    Options available

    Optolong LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter se...

    View full details
    $665.00 USD - $1,009.00 USD
    $665.00 USD - $1,009.00 USD
    $665.00 USD - $1,009.00 USD
    $665.00 USD
  • $149.00 USD - $289.00 USD
    $149.00 USD - $289.00 USD
    $149.00 USD - $289.00 USD
    $149.00 USD

    Optolong L-Pro Filter

    Options available
    2 variants in stock

    Optolong L-Pro is multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows ast...

    View full details
    $149.00 USD - $289.00 USD
    $149.00 USD - $289.00 USD
    $149.00 USD - $289.00 USD
    $149.00 USD
  • $106.00 USD - $285.00 USD
    $106.00 USD - $285.00 USD
    $106.00 USD - $285.00 USD
    $106.00 USD

    Baader UHC-S/L-Booster Filter - CMOS-Optimized

    Options available

    The Baader Planetarium UHC-S Nebula filter excels at delivering a high-contrast and natural view of emission nebula - without excessive dimming and...

    View full details
    $106.00 USD - $285.00 USD
    $106.00 USD - $285.00 USD
    $106.00 USD - $285.00 USD
    $106.00 USD