Filters (Photographic)

We are glad to announce the availability of 2 inch mounted deep space photographic filters for broadband and narrowband usage.

More filters types and sizes are going to follow

Bandpass Filters

Parfocal LRGB Filters

Broadband filters are parfocal which ensures that you will not have to refocus when you quickly switch filters to capture images.

Anti-Reflection Coatings

Multi-layers anti-reflection coating ensure no halos, ghosting or reflections. Filters are resistant to scratches and do not get affected by temperature change.

Equal weight on RGB filters

RGB color combine weights are 1:1:1

Limit Sodium Light Polution

A gap between green and red filters blocks out the primary Sodium light pollution line at 589nm and improves color balance and separation.

Max transmission

Filters have been designed to allow max transmission for true original, natural color imaging.

The Luminance UV/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image and reduce halos on lens optical systems.

It can be used on a CMOS and CCD cameras which do not have an IR protection filter toward an image sensor or were remodeled (DSLR, Mirrorless). 

This type is required to unfiltered CCD and CMOS sensors as they are extremely susceptible to UV and IR rays just outside the visible spectrum can have a very negative impact on image quality.

SKU

PEG-FLTR-2M-L

Filter Size

2 inch

Polish

1/4 wavefront, Parfocal

Transmission Range

Tave>95%, 410-680nm

Coatings

Multilayer Anti-reflection

Type

Bandpass

Shape

Round

Thickness

5mm (filter) + 2.5mm (thread)

Thread

M48, 0.75 pitch

A high contrast Red filter suitable for CMOS and CCD sensors. Filter is IR-blocked

SKU

PEG-FLTR-2M-R

Filter Size

2 inch

Polish

1/4 wavefront, Parfocal

Transmission Range

Tave>95%, 600-680nm

Coatings

Multilayer Anti-reflection

Type

Bandpass

Shape

Round

Thickness

5mm (filter) + 2.5mm (thread)

Thread

M48, 0.75 pitch

 

A high contrast Green filter suitable for CMOS and CCD sensors. Filter is IR-blocked

SKU

PEG-FLTR-2M-G

Filter Size

2 inch

Polish

1/4 wavefront, Parfocal

Transmission Range

Tave>95%, 500-550nm

Coatings

Multilayer Anti-reflection

Type

Bandpass

Shape

Round

Thickness

5mm (filter) + 2.5mm (thread)

Thread

M48, 0.75 pitch

A high contrast Blue filter suitable for CMOS and CCD sensors. Filter is IR-blocked

SKU

PEG-FLTR-2M-B

Filter Size

2 inch

Polish

1/4 wavefront, Parfocal

Transmission Range

Tave>93%, 410-500nm

Coatings

Multilayer Anti-reflection

Type

Bandpass

Shape

Round

Thickness

5mm (filter) + 2.5mm (thread)

Thread

M48, 0.75 pitch

Narrowband Filters

This narrowband filter has a 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.

SKU

PEG-FLTR-2M-HA

Filter Size

2 inch

Polish

1/4 wavefront, Parfocal

Transmission Range

T >80% 656 nm, 7nm FWHM

Coatings

Multilayer Anti-reflection

Type

Narrowband (7nm)

Shape

Round

Thickness

5mm (filter) + 2.5mm (thread)

Thread

M48, 0.75 pitch

OIII-CCD 7nm filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

SKU

PEG-FLTR-2M-O3

Filter Size

2 inch

Polish

1/4 wavefront, Parfocal

Transmission Range

T > 80% 500 nm, 7nm FWHM

Coatings

Multilayer Anti-reflection

Type

Narrowband (7nm)

Shape

Round

Thickness

5mm (filter) + 2.5mm (thread)

Thread

M48, 0.75 pitch

Extra narrowband SIICCD 7nm filter (Sulful II for CCD) is designed for nebula observation allowing 12nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)

SKU

PEG-FLTR-2M-S2

Filter Size

2 inch

Polish

1/4 wavefront, Parfocal

Transmission Range

T > 80% 672 nm, 7nm FWHM

Coatings

Multilayer Anti-reflection

Type

Narrowband (7nm)

Shape

Round

Thickness

5mm (filter) + 2.5mm (thread)

Thread

M48, 0.75 pitch