Optolong Variable Polarizing Filter - 2"

แบ่งปันสิ้นค้าชิ้นนี้

รายละเอียด

คะแนนสินค้า
SKU
OP125-200
ผู้ผลิต
จำนวนในสต๊อก
เหลือ 1 ชิ้น
น้ำหนัก
50.00 g
ราคาของเรา
฿1,590.00

ตัวเลือก

จำนวน (เหลือ 1 ชิ้น)

(จาก 1 ถึง 1)


  • รายละเอียด

  • สินค้าแนะนำ

  • รีวิว

  • ความคิดเห็น

  • ส่งให้เพื่อน

A. About Optolong's Variable Polarizer Filter

A variable polarizing Moon filter consists of two single polarizing filters coupled together. One of these has threads to attach to the bottom of eyepieces or other threaded adapter barrels, and the second filter can freely rotate over 360-degrees, thus allowing you to control the brightness of the image over a wide range. You simply rotate the lower filter until the image brightness is pleasing and comfortable for you, given your telescope aperture and the phase of the Moon. While primarily meant for use while observing the Moon, this filter can also help with observations of other bright objects like Venus and Jupiter. Please note, however, that unlike some other similar filters on the market, the two Optolong filter components of this item cannot be separated.

B. Technical Specifications

  • All surfaces are fine optically polished, accurate to 1/4 wavelength or better, and parallel to within 30 seconds or arc.
  • 2mm thick Schott B260 optical glass substrate material.
  • Very high surface quality of 60/40 or better (US Military Spec MIL-O-13830).

C. 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.

D. Other

  • 2" astronomy filter with standard M48x0.75 male filter thread.
  • 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.

  • เคส Amazon Kindle Touch Leather Cover (สีเขียวมะกอก)

    เคส Amazon Kindle Touch Leather Cover (สีเขียวมะกอก)

    Product Features

    • Sleek, lightweight design protects Kindle Touch without adding bulk
    • Premium leather exterior looks and feels great
    • Cover folds back for easy one-handed reading
    • Product Dimensions: 7 x 5 x 0.6 inches
    • Shipping Weight: 4.2 ounces
    ฿999.00
  • iOptron Carry Bag for 1.5-inch Tripod

    iOptron Carry Bag for 1.5-inch Tripod

    Top loading carry bag. Perfect for carrying tripod for SkyTracker, ZEQ25,(1.5-inch tripod version), or SmartEQ. Will hold other tripods also (see dimensions).

    Durable stictched fabric with additional pockets to carry small accessories to your site. A small tripod can be top loaded into the main compartment. And two outer pockets can hold the rest of your equipment. One pocket is large enough to hold your SkyTracker camera mount. The other pocket can hold a polar scope and ball head.

    ฿1,490.00
  • กล้องดูดาว William Optics ZenithStar 73 III, f/5.9 OTA, Gold  *รวม 32mm UniGuide*

    กล้องดูดาว William Optics ZenithStar 73 III, f/5.9 OTA, Gold *รวม 32mm UniGuide*

    William Optics ZenithStar 73 III APO, f/5.9 OTA, Gold *รวม 32mm UniGuide*

    • Premium 73mm apochromatic refractor for astronomical and terrestrial imaging and visual observation
    • Apochromatic f/5.9 doublet objective with FPL-53 glass
    • Large image circle for imaging with APS-C and full-frame sensors when used with the optional field flattener
    • Compact form factor and light weight ideal for transport and travel
    ฿22,490.00
    SALE
  • *PREORDER* กล้องดูดาว Sharpstar SCA260 v.2 260mm f/5 Ashperical Cassegrain Astrograph v2.1 (ฟอกัสเซอร์หมุนได้)

    *PREORDER* กล้องดูดาว Sharpstar SCA260 v.2 260mm f/5 Ashperical Cassegrain Astrograph v2.1 (ฟอกัสเซอร์หมุนได้)

    กล้องดูดาว Sharpstar SCA260 v.2 260mm f/5 Super Ashperical Cassegrain Astrograph with Integrated Field Flattener & Carbon Fiber Tube Ver2.1 (ฟอกัสเซอร์หมุนได้)

    The Sharpstar SCA260 is a fast focal ratio Cassegrain astrograph for serious astrophotographers that delivers superb images at an affordable price. With an aspherical f/5 primary mirror of 260mm aperture, the SCA260 includes an integrated three-element air-spaced corrector that produces a huge 80mm image circle. With a full-frame camera, the 1300mm focal length of the SCA260 delivers a big 1.5o x 1.0o field of view that’s flat and well corrected right to the edge.

    Note: Version 2.1 improves on the v2.0 by having the rotator between the telescope and focuser (therefore focuser can also be rotated). Pictures below mostly shows v2.0 but new orders will receive the latest 2.1 version.

    ฿149,990.00
  • Sharpstar 3" Quadruplet 0.85x Reducer / Coma Corrector for f/3-f/6 Newtonian Reflectors

    Sharpstar 3" Quadruplet 0.85x Reducer / Coma Corrector for f/3-f/6 Newtonian Reflectors

    Sharpstar 3" Quadruplet 0.85x Reducer / Coma Corrector for f/3-f/6 Newtonian Reflectors 

    Sharpstar 30085NTRD coma corrector can shorten the original focal ratio of f/4 to f/3.4, greatly shortening the exposure time. Besides, the Sharpstar 30085NTRD coma corrector is considerately designed with many threads. At the front of the corrector, there is M82×1 male thread for the connection to our 3" focuser. At the back of the corrector, there is tapped with M76×1 male thread, M68×1 female thread and M54×0.75 female thread, which can be used to thread on our M54 to M48 camera adapter ring. The back-focus is standard 55mm, starting from the M54 thread(camera end) to focal plane.

    ฿23,990.00
  • ZWO M68 sensor tilt adapter

    ZWO M68 sensor tilt adapter

    Product Description

    M68 sensor tilt plate (5mm) is independently developed by ZWO and specially made to match with the full-frame cooled camera ZWO ASI6200MM/MC Pro.

    You are encouraged to use it with ZWO 2inch EFW and ZWO M68 OAG and mount them on the M68-thread telescope side.

    ฿1,190.00
  • *PREORDER* เลนส์ถ่ายดาว Askar FMA180 PRO 40mm f/5.5 Triplet Apo Lens / Guidescope #FMA180PRO

    *PREORDER* เลนส์ถ่ายดาว Askar FMA180 PRO 40mm f/5.5 Triplet Apo Lens / Guidescope #FMA180PRO

    เลนส์ถ่ายดาว Askar FMA180 PRO 40mm f/5.5 Triplet Apo Lens / Guidescope #FMA180PRO

    • ASKAR FMA180 40mm aperture apochromatic telescope/camera lens features multiple optical configurations
    • Uses three-element objective lens with two ED elements for superb color correction and image quality
    • Configures as a finder/telescope/guide scope with a focal length of 220mm and focal ratio of f/5.5
    • Includes three-element focal reducer and spacers to configure as a six-element f/4.5 apo telescope with focal length of 180mm for wide-field astronomical imaging
    • Includes tube mounting rings, Vixen-style dovetail, and Swiss-Arca mounting plate for a wide range of mounting configurations

     

    Askar FMA180 Pro vs FMA180 original:

    • All new marked 360º rotator
    • New one-piece internal focus system
    • New finder base for attaching accessories like the ASIAIR
    • Improved longer Vixen-style dovetail
    • Upgraded metal knurled thumbscrews
    • Larger M48x0.75 rear threads
    • New filter thread adapter allowing 2" filters to be inserted
    ฿14,990.00
  • Optolong L-eXtreme F2 Dual-Band Filter - 2"

    Optolong L-eXtreme F2 Dual-Band Filter - 2"

    Optolong L-eXtreme Dual Bandpass Light Pollution Reduction Imaging Filter - 2"

    ฿11,990.00
  • *NEW 2024 VERSION* Antlia Quad-band Anti-Light Pollution Filter - 2" Mounted

    *NEW 2024 VERSION* Antlia Quad-band Anti-Light Pollution Filter - 2" Mounted

    Antlia Quad-band Anti-Light Pollution Filter - 2" Mounted

    The Antlia Quad Band Anti-Light Pollution Filter is a light suppression filter for color and monochrome cameras. It is able to shoot most deep sky objects like galaxies, reflection nebulae, emission nebula, and star clusters from a Bortle 8 location to Bortle 1 as its spectral transmission passes through visible light region, near-ultraviolet (NUV) and near-infrared (NIR) region.

    ฿6,990.00

ขณะนี้ยังไม่มีผู้รีวิวสินค้ารายการนี้




ส่งให้เพื่อน

: *
: *
: *
พิมพ์ตัวอักษรที่เห็นในภาพ:


*
รหัสเป็น case-sensitive และจะต้องใส่ตรงตามที่กล่าวข้างต้น

รีวิว


ได้รับ​สินค้า​ครบสมบูรณ์​ ไม่ได้รับ​ความเสียหาย pre-order แต่ได้รับภายใน​4วัน
ปราโมทย์​
Oct 4, 2023

ผู้ผลิต