Exclusive offer from Cyclops Optics: Besides the usual FREE Shipping Offer for most countries worldwide, now we further offer a FREE LensPen (original value US$11), allowing you to clean the surface of your optical equipment safely. In case your chosen option is out of stock, we will send another version for you.

STC Astro-Multispectra Clip Filter for Nikon full frame bodies is a novel light pollution filter designed by STC Optics with transmission characteristics designed by professional astronomer and renowned astrophotographer Dr. Wei-Hao Wang. Check out the comparisons below to see how effective the Astro-Multispectra filer is!

Placing the light pollution filter closer to the sensor reduces color shift that may occur at the peripheral areas of the image if front screw-in lens filter is used.

Highlights

• Greatly reduce interference from artificial lighting in city
• Suitable for Nikon full frame DSLR* with camera lens of focal length 14mm or longer
• Natural colour representation
• High transmission for astronomical bodies emission
• Co-developed by STC and Dr. Wei-Hao Wang, a professional astronomer and renowned astrophotographer

* Please refer to compatible camera list below

**Nikon users who will only use the camera with telescopes are encourage to use the 48mm version of STC Astro-Multispectra filter.

Features

• Clip Filter is designed for Nikon Full-Format cameras. Mounting and removing the Clip-Filter is quick and easy. The color shift problem that may occur due to the wide angle SLR lens in peripheral areas of the image could be reduced. The recommended SLR lenses focal length is 14mm or longer on full frame bodies.
• The material is A2 stainless steel which is virtually non-magnetic and less brittle at low temperatures. Specially designed Clip-shaped structure could be pressed firmly while attaching the lens on camera body.
• STC Astro-MS Clip filter can reduce the interference from artificial lighting in the city ,and enhance the wavelength of Hα, Hβ, OIII and SII. (Hα=656.3 nm, Hβ=486.1 nm, OIII=495.9 & 500.7 nm, SII=672.4 nm)
• It is coated by the use of the IBAD (Ion beam-assisted deposition) technology on Schott® B270 optical 2mm glass, working for higher durability and easily cleaning, and preventing aging variation in optical spectral characteristics due to temperature and humidity change
• High-quality double-sided NANO Anti-smudge coating provides excellent performance on waterproof and grease-proof capability
• Considering the different optical lens properties of all kinds of brands, it is normal for spherical and coma aberration to occur on part of the fisheye lens, super wide angle lens and wide angle lens.
• 18 months original manufacturer warranty and lifetime warranty on aluminium frame 

Compatible Nikon bodies

• D4 / D4s
• D800 / D800E
• D810 / D810A
• D750 / D700
• D600
• D610 ^
• Df

^ Some batches of D610 might show error code when the clip filter in place due to motorised flip mirror 

Also available for

• Canon APS-C
• Canon Full Frame
• Fujifilm X APS-C
• Nikon APS-C
• Nikon Full Frame
• Olympus M43
• Pentax
• Sony Full Frame
• Sony APS-C
• 48mm / 77mm

Before & After

Without STC Astro-Multispectra	With STC Astro-Multispectra

Direct JPEGs output from Nikon D800

Credits: Dr. Wei-Hao Wang Camera: Nikon D800 (astro-modded) Lens: Nikkor AIS ED 180mm f/2.8 @ f/4 Exposure: 2 minutes

STC Astro-M Transmission Characteristics

1. Natural colour representation by selectively blocking out UV light below 410nm, sky glow in between 620nm and 640nm and infrared light beyond 680nm
2. High transmission for astronomical bodies emission at Hα=656.3 nm, Hβ=486.1 nm, OIII=495.9 & 500.7 nm, SII=672.4 nm and slightly passing yellow-orangish emission at 605nm.

FAQ 

Where does the clip filter go? 

The clip filter sits nicely on the cavity in your camera body, before the mirror. It doesn't get in touch with the sensor at all.

Will the mirror damage the filter or vice versa?

No, when the clip filter is in place, the mirror will rest on the clip filter frame which is made of 304 stainless steel and padded with shock absorbing material. 

Is it okay to release the mirror lock?

Absolutely! There is no harm to be caused to the mirror or the filter. It's perfectly fine to leave the clip filter in the body even when powered off.

Installation Procedure

A. Select LV (liveview mode) after turning on the camera. The mirror will lock up and then remove the lens.

B. Slide the Astro-M clip filter at an inclined angle of 45º into the camera as shown below.

C. Make sure the clip filter fit nicely and flat

D. Attach the camera lens and start capturing via LV mode

STC Technologies

STC utilises ion beam assisted deposition (IBAD) to solidly bind the coatings onto Schott B270 glass, the very same glass used in Zeiss lenses. Such technique enhances the light transmission and also durability of the 160 layers of coating deposited to produce the advanced filter characteristics shown above.

With patented Ultra Layer® technology, both surfaces of Astro-Multispectra are coated with Anti-Smudge nano-coating to prevent dust and water from settling on the filter surface. Dew will not form and your filter is always clean. If necessary, it's effortless to clean.

Warranty

6 months warranty covering defects due to manufacturing and workmanship

Extended to 12 months by registering on STC website.

Specifications