ThaiExcite

ThaiExcite
88/41 Kanlapapruek Road, Bangkae, Bangkae, 10160, Bangkok, ประเทศไทย
ติดต่อสอบถาม: 081-239-3299
อีเมล์: info@thaiexcite.com


URL: http://www.thaiexcite.com/Thousand-Oaks-Optical-Silver-Black-Polymer-Sheets-12x12-305x305mm-OD-5.0.html


ฟิล์มฟิลเตอร์ส่องดวงอาทิตย์ Thousand Oaks Optical Silver Black Polymer Sheets ขนาด 12x12" (305x305mm), OD 5.0


รายละเอียด


คะแนนสินค้า
ผู้ผลิต
จำนวนในสต๊อก
เหลือ 2 ชิ้น
น้ำหนัก
100.00 g
ราคาของเรา
฿990.00


รายละเอียด


ฟิล์มฟิลเตอร์ส่องดวงอาทิตย์ Thousand Oaks Optical Silver Black Polymer Sheets ขนาด 12x12" (305x305mm), OD 5.0

USA flag

Made in the USA

 

ก่อนส่องดูดวงอาทิตย์ทุกครั้ง กรุณาปฎิบัติตามนี้เพื่อป้องกันการสูญเสีย

  1. ก่อนส่องดูดวงอาทิตย์ทุกครั้ง ควรตรวจให้แน่ใจว่าฟิลเตอร์ส่องดวงอาทิตย์สามารถใช้กับกล้องได้อย่างกระชับ ไม่หลุดง่าย ถ้าจำเป็นควรติดเทปเพื่อป้องกันการหลุดออกจากหน้ากล้อง
  2. ห้ามใช้ฟิลเตอร์ส่องดวงอาทิตย์รุ่นที่ติดกับ eyepiece ควรใช้รุ่นที่ติดด้านหน้ากล้องเท่านั้น มิเช่นนั้นความร้อนที่เกิดจากแสงอาทิตย์อาจจะทำลายกล้องดูดาว ฟิลเตอร์ส่องดวงอาทิตย์ และดวงตาของใช้งาน
  3. ถ้าใช้กล้องสองตาเพื่อส่องดวงอาทิตย์ ควรติดฟิลเตอร์ส่องดวงอาทิตย์ที่หน้ากล้องของเลนส์ทั้งสองข้าง สำหรับกล้องนำหรือกล้องเล็ง (finderscope) ควรปิดให้สนิทและงดการใช้งาน หรือถอดออกไปจากกล้องหลัก เพราะการมองผ่านกล้องนำที่เล็งไปที่ดวงอาทิตย์มีผลเสียหายไม่แตกต่างจากกล้องหลัก!
  4. ฟิลเตอร์ดวงอาทิตย์ที่ทำจากฟิล์มจะไม่หล่นแตกง่ายเหมือนฟิลเตอร์ที่ทำจากกระจก แต่ก็ควรระมัดระวังเกี่ยวกับของแหลมหรือมีคมที่อาจทำให้ฟิล์มฉีกขาดได้
  5. ควรให้คำแนะนำกับผู้คนที่ใช้กล้องดูดาวร่วมกัน (เด็ก เพื่อน ญาติ หรือผู้อื่น) เกี่ยวกับข้อควรระวังในการส่องดูดวงอาทิตย์ โดยเฉพาะเด็ก การจงใจดึงฟิลเตอร์ออกเพราะความซุกซนหรือเพื่อความสนุกสนานของเด็กโดยรู้เท่าไม่ถึงการณ์อาจทำให้เกิดการสูญเสียการมองเห็นอย่างถาวร คำแนะนำก่อนการใช้งานเป็นสิ่งจำเป็น และไม่ควรทิ้งกล้องดูดาวไว้นอกบ้านตามลำพังในตอนกลางวัน!

 

thousand-oaks-solarlite-filter-sheet 

 

 

Who said you have to be in the dark to do astronomy? Turning your telescope to the Sun is fun and educational. Watch the march of giant sunspots, the clouds of glowing vapor in the photosphere, and solar "granulation" detail. But be sure to protect your precious vision with a safe Thousand Oaks solar filter! Looking at the Sun without one, even for an instant, can permanently damage your eyes.

 

Low cost for safely looking at the Sun 

These black polymer telescope filters deliver superb views of the Sun, without risk to your eyes. The Thousand Oaks black polymer solar filters also provide better contrast, a more natural yellow-orange color instead of blue. They're ideal for photographing the Sun too!

Thousand Oaks Optical's high quality black polymer from Thousand Oaks Optics provide the highest safety features, along with crisp and beautiful eye pleasing orange solar images. Unlike metallized Mylar, the black polymer gives a sharp, comfortable orange image instead of unnatural pale blue. The protective filtering properties of the black polymer are throughout the substrate so there is no concern about safety. It is great for making inexpensive and safe filters for binoculars, cameras, and custom solar viewers.

CAUTION: Never look at the Sun, even for an instant, without a protective solar filter. Doing so can permanently damage your eyes.

 

Pinholes and Minor Scratches

Pinholes and minor surface scratches are common in solar filters, however, Thousand Oaks Optical's multi-coating technique keeps them to a minimum. A "bright" pinhole may cause "ghosting" due to scattered light. If this is seen during observation, the pinhole(s) should be blocked out. Blocking out any pinholes should be done on inside coated surface. Hold filter 1-2 feet in front of a standard 60-100 watt "soft white" light bulb. Blocking can be done with a fine point felt marker, small drop of paint, typing correction fluid etc. The touch up procedure will not degrade the optical performance. It is not necessary to touch up any small pinholes that do not cause image problems. There is no danger if some small non light scattering pinholes or minor scratches are present. All filters are tested for safety before shipment.

 

Frequently Asked Questions (FAQs)

ARE THE FILTERS COMPLETELY SAFE? All of Thousand Oaks Optical Glass 2+, Solarite, RG-Solar Film & Silver-Black Polymer filters are completely safe for unlimited visual use. If handled with care and common sense, all will last a minimum of 20 years to life.

DO THE ALUMINUM CELLS COME WITH THUMB SCREWS? Thumb screws may seem like a good idea, however, our extensive testing found that in most cases it's actually less secure than a felt lining which covers a lot more surface area for a secure friction fit. If the tolerance is within a few thousands of an inch such as with eyepiece holders, it would be fine, but this is rarely the case. Thumb screws can also dent and scratch the tube and put strain on the filter glass. Thumb screws are simply a "one size fits many" manufacturing shortcut and provide a false security.

CAN THE TELESCOPE OPTICS GET HOT OR DAMAGED? No, all the heat and intense light is blocked before it can enter the telescope. Your telescope may get warm from sunlight shining on it, not from the small amount of visible light transmitted through the filter.

WHAT DETAIL IS VISIBLE? Sunspots and surface granulation are the two main features. The only detail that cannot be seen with a standard filter (commonly called white light filter) are prominence and flares which require our highly specialized H-Alpha filter system.

WHY ARE THREADED CAMERA FILTERS ONLY AVAILABLE IN BLACK POLYMER? RG and Glass filters have highly reflective coatings that can cause internal reflections between the filter and camera lens since the filter and lens are in close proximity. This problem is less likely to occur with telescopes, however, mounted telescope filters can be tilted slightly to move any internal reflections off axis and out of view.

 

 

SOLAR FILTERS White Light  (580-630nm)

Printable SolarLite Filter Instructions

 

TECHNICAL DETAILS:

Glass 2+:  High quality hand selected glass with metallic coating on inside surface facing optics.
SolarLite Film:  Metallic coating outside surface & absorptive material within substrate.
Silver-Black Polymer Film:  Metallic coating outside surface absorptive material within substrate.

All filters block 99.999% of the energy from entering the instrument. For visual and photographic use.

 

IMPORTANT:

Pinholes and minor surface scratches are common in glass solar filters; however, our multi-coating technique keeps them to a minimum. A “bright” pinhole in the coating may cause “ghosting” due to scattered light. If this is seen during observation, the pinhole(s) should be blocked out. Block out any pinholes on inside surface facing telescope. Hold the filter 1-2 feet in front of a 50-100 soft white light bulb. Blocking can be done using a fine point felt marker. There is no danger if a few pinholes or minor scratches are present. The touch-up(s) will not lessen the optical performance. Small pinholes need not be blocked if not causing an image problem.

 

MOUNTING:

If your filter is too loose, it can be custom fitted using the extra felt included. If the paper backing is difficult to remove, dampen with water or alcohol using a wet sponge or fine spray mist. Peal backing off slowly. Let dry if necessary before installing on inside of cell. Extra felt can be added over any existing felt. Test fit before removing the backing and permanently installing the felt. We cannot exchange for another size if the felt is installed.

 

TIPS:

 

CLEANING:

Glass: Loose dust can be blown off with up to 15 PSI. Clean with Isopropyl (rubbing) alcohol and a soft tissue. Do not use a cloth. It’s best to mist the filter with a spray versus soaking the tissue. Use a 3 inch or larger circular wad of tissue and lightly rub across surface using long strokes. Lightly wipe dry with a fresh dry tissue.

SolarLite & Silver-Black Polymer Film:  Same as glass, however, polymer is more susceptible to small surface scratches, so extra care should be taken. Surface scratches will not compromise the safety.

 

Please observe the following safety precautions with EVERY solar observation

  1. Prior to each and every solar observation session, check the filters fit and - if necessary - tape it to prevent slipping. Never use the filter at the eyepiece, only attach it onto the front of the objective, in front of the Schmidt-plate (SC-owners) or in front of the tube of a Newtonian-telescope. Otherwise it can become dangerously hot inside your instrument and inside your eyes.
  2. If you use a binocular, protect both objectives with a filter. Also make sure, that the viewfinder of your telescope is properly covered, either with foil or with the original dust cover. Unprotected views through your finderscope would have the same catastrophic consequences for your eyes as a look through the main telescope itself !
  3. A filter made of film is relatively resistant to breackage in comparison to a glas filter. However, care should be taken with sharp pointed objects.
  4. Emphasize the importance of caution to those observing with you, especially children. Intentionally removing or damaging the filter can endanger their eyesight. This is no place for jokes. Never leave the telescope outside unattended during the daytime ! 

CAUTION: Never look at the Sun, either directly or through a telescope, without a professionally made protective solar filter installed that completely covers the front of the instrument, or permanent eye damage could result.

 

                คำเตือนการส่องดูดวงอาทิตย์ Solar Warning