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Optolong Clear Focusing Imaging Filter - 2"

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SKU

OP124-200

ผู้ผลิต

Optolong

จำนวนในสต๊อก

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น้ำหนัก

50.00 g

ราคาของเรา

฿1,090.00

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A. About Optolong's Clear Focusing Filter

The Optolong Clear Focusing filter is designed to highly pass the visible spectral region from 420-680nm at 98.5% transmission.

B. Main Uses and Performance

Use of astrophotography filters, especially narrowband filters, often results in dim images which can be difficult to focus. Clear focusing filter can be used first to clearly focus the image and then replaced by other Optolong imaging filters.
Use with modified DSLRs for higher efficiency and sensitivity by passing visible range with 98.5% transmission.
Act as an outstanding dust shield, which prevents the possibility of dust settling on the lens during long time exposure.

C. Spectral Curve Transmission Characteristics

98.5% transmission over the visible spectral region over 420-680nm.

D. Technical Specifications

Both surfaces are fine optically polished, accurate to 1/4 wavelength or better, and parallel to within 30 seconds or arc.
2mm thick Schott B270 optical glass substrate material.
Very high surface quality of 60/40 or better (US Military Spec MIL-O-13830).

E. Optical Coating Specifications

Multi layer anti-reflection coated.
Non-cementing optical substrate coating.
Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) so that there is no deviation due to temperature changes during use.
Precise and homogeneous coatings ensure high values of desired passband and blocking of unwanted offband.
Every single filter is tested and passed by Optolong before shipping to dealers.

F. Other

2" astronomy filter with standard M48x0.75 male filter thread (no female thread, so it cannot be stacked with other filters).
Ultra-thin filter cell to minimize vignetting; clear optical aperture of 45mm.
Precision CNC-machined metal filter cell with sand blasted black anodized finish, anti-reflection treatment, and laser engraving.
High quality protective plastic storage case.

WARNING: Optolong filters are not designed for direct solar observation. NEVER use these filters for observing the Sun, or permanent eye and equipment damage will result.

Additional Information

About Optolong

While Optolong is a relative newcomer to the astronomy industry, they are no strangers to optics and filters. Optolong is a division of Yulong Optics Company, a high tech company specializing in optical filter design and production. Their products include bandpass filters, flourescence filters, edge filters, longpass and shortpass filters, beam splitters, anti-reflection coatings, optical mirrors and, of course, astronomical filters.

Established in 1999 and based in Kunming City, China, Optolong/Yulong provides nearly 2000 types of optical filter coatings annually to customers worldwide in a wide variety of industries and applications.

Additional Information

About Optolong

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฿790.00

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Medium dovetail clamp with a brass screw for telescopes and cameras
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฿14,490.00

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ฟิลเตอร์ SVBONY Dark Filterสำหรับถ่าย Dark Frames บนกล้อง CCD, 2"

Quickly capture dark frames to optimize photo quality
Opaque - blocks all light from the imaging camera sensor. Help remove dark currents - essential for astrophotography
Easily eliminate camera noise and hot pixels
Dark frame acquisition helps remedy such noise and "hot pixels" by canceling out these disruptive effects during image processing
Threaded and can be directly connected to your filter wheelfor fast conversion between different filters;
Made of metal for durability. High quality packing box includes foam-lined plastic case

฿590.00

ZWO Filter Drawer (M42) for 2" Mounted Filter (2nd Gen)

New M42 Filter Drawer (2nd Gen)

New 2″ filter drawer featuring the anti-light-leaking design that can effectively solve the light leaking issue under long exposure.

฿2,990.00

ZWO Spare Filter Holder (2nd Gen) for FD-Nikon / FD-EOS / FD-M54-II / FD-M42-II

New 2″ filter drawer featuring the anti-light-leaking design that can effectively solve the light leaking issue under long exposure.

฿1,490.00

ZWO 12V 5A AC to DC adapter for cooled cameras and ASIAIR series

ZWO official standard AC/DC adapter to be used with ASI cooled cameras and ASIAIR Pro, ASIAIR PLUS.

The handy adapter supplies constant 12-volt power at 5A.

฿1,190.00

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฿11,500.00

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