Optolong

1. Photometric Filters 

“Historically our Solid-State Photometers used custom filters designed to transform well to the Johnson photometry standards with our detectors.”

UBVRI filters are not for as

Optolong Planetary Filters Kit 

Optolong Planetary filters kit including UV/IR Cut, R, G, B and IR685 filter, 5pcs filters in total. These five filters are boundled by “Solar System Seal”.

Wha

Optolong SHO-3nm Narrowband Filters Introduction

Optolong SHO-3nm filter kit includes SII 3nm, H-Alpha 3nm, and OIII 3nm narrow band filters, generally working with astronomical monochrome cooling CC

Optolong SHO Narrowband Introduction

Optolong SHO6.5nm filter kit includes SII6.5nm, H-Alpha7nm, and OIII6.5nm narrow-band filters, generally working with astronomical monochrome cooling CCD and modi

Optolong Improved OIII6.5nm Narrowband Introduction

Optolongimproved narrowband SII6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on

Optolong Improved OIII6.5nm Narrowband Introduction

Optolongimproved narrowband SII6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on

1.Optolong UHC 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

1.Optolong UHC 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

1. Optolong UV/IR Cut Filter Introduction

Optolong UV/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most of the optics are designed f

1.  Venus U Filter Introduction

Optolong Venus-U filter makes it possible to obtain photographs, CCD or video images in the UV-A (320-400nm) and observe Venus’ cloud structures.

Main Use

Use with m