Telescope 60AZ， 70400，80EQ， 90EQ， 114EQ， 130eq Bard membrane cover.

make order with note which one you need please!

When measuring the sun ， must not be used directly target finder to find the sun . Remember !

Buju observations :

1 ， fitted with a lens cloth or lid cover finder has been error -free operation !

2 ， directly to the Bard membrane facing the sun ， view， light leakage detection is not there ， there is leaked ， prohibited the use of

3 ， after the test is complete ， put the lid on the Bard membrane into the optical port ， check the fixed case， after intact ! Metering at the eyepiece ， no abnormal light before the operation !

4， in the observation process ， so that the edge of the net not been easy to move personnel Bard film lid.

Background and Introduction

· The optical quality of the film at the time of extremely high precision interferometry to produce consistent 94-96 % of Steyr rate (STREHL RATIO) thus features optically tantamount to some of the world \'s leading professional company produces calcium fluoride three chip objective lens ( the interferometric measurement results in terms ) . because it is difficult to distinguish between optical quality sun protection film AstroSolarTM observed and some of the world \'s leading professional company produces 1 / 20 precision optical window ， 1 / 20 precision optical window may instantly become worthless ， simply can not be sold. the protective film with any functional sharp contrast enhanced products ( glass lens filter ) compared .

More importantly ， the protective film so that the solar AstroSolar TM exhibit true colors : Neutral white film and the glass filter and the other to produce a blue or red glow like the sun ， separates the part of the spectrum : in particular， when viewing the sun orange when it is extremely difficult to observe the blue end of the solar flare .

· Eye-safe solar observation protective film AstroSolar TM basically no pinholes， and even the expensive glass filters can not help but have a pinhole its coating on both sides to make any two pinhole minimal probability of coincidence and leaked sun protection observed film AstroSolar TM has been approved by the German National Bureau of Standards PTB- eye safety. unlike other sun filters ， protective film AstroSolar TM is the standard mechanism by CE EG-Norm 89/686 and EN169 / 92 tests ( to be notified No. 0196 ) All steps are related to the product thoroughly tested. coating by constancy tests to continue to ensure the safety of the user\'s eye .

· Sun protection film AstroSolar TM observed history is currently in 11 August 2000 has sold 19 million of the film to the whole of Europe eclipse observer ， without any user by eye injury， the manufacturer has been producing solar protection film over 12 years ， are eligible to claim that the film on the highly competitive solar observation the film reveals the sun hidden to the user spectacular ， which required only a fraction of the cost of expensive equipment . specialized solar observation belongs those stubborn amateurs， they may not hesitate to buy 1 / 20 glass filter or two inches Herschel light deed to pay $ 1，000 ， but now they can not hesitate to buy 1 / 20 glass filter glasses or protective film AstroSolar 2 -inch aperture TM， and receive the same accuracy. Consequently， solar observation is no longer troublesome， protective film AstroSolar TM users to enjoy all the fun amateur many users have a protective film AstroSolar TM after all abandoned the old filter ， they made was to pursue a completely new and highly pure aesthetic value of the sun ， because the protective film AstroSolar TM telescopes in the day and night have the same effect was observed people are always surprised when amateurs observe our nearest star --- Fengyun easily accept mediocrity as the sharpness of the sun ， but for other stars for observation telescope image quality and picky.

· Product Inside ， product variety protection film AstroSolar TM 1999 due to huge demand applications eclipse observation born . Manufacturing workers with experimental film ， and in order to obtain absolute treatment technologies are part of the structure of the substrate film used in experiments dozens of miles to a film not to speak in order to obtain the desired characteristics for the correlation processing ， annealing， and those used in the double-sided coated film ， generally ， the manufacturer can provide the following types of film products ， which the user no effect on the image quality of the telescope (1 ) AstroSolar TM protective film for solar observation and photography ; ( 2 ) low-density protective film TurboFilmTM expensive optical devices used to protect the night : screen to avoid dust， wipe the touch ， the film defects ， and the influence of moisture on the surface of the mirror barrel ， and the final cut off instead of the lens barrel ， at least the air flow .

· Protective film AsrosolarTM photographic film due to the radical Sun photographer always criticized : Depending on the density of D = 5 for eyepiece projection ， it is too dark ， the producer accordingly provides two protective film AstroSolar TM (1) AstroSolar TM photographic film ， depending on the density of D = 3.8 can be provided with an eyepiece projection， or the manufacturer of the upcoming four times the flat-field image rotator with calcium fluoride ， to shorten the exposure time. 4 times the flat field fluorinated using the image rotator APQ founder and three-piece lens design Abbe eyepiece optical system in the flat -field diameter of 120mm ， the line resolution is four times that two inches flat field image rotator calcium fluoride to obtain the best times Zeiss - Abbe (ZEISS ABBE) or Pentax (PENTAX) eyepiece as a protective film AstroSolar TM as flat field Bard four times as calcium fluoride turn will be seen in the use of the sharpest " Barrow " ( BARLOW) mirror .

AstroSolar TM photographic film D = 3.8 to 1000 seconds can provide a short exposure time . If there is no neutral gray filter ， do not use AstroSolar TM photographic film as the eyepiece .

Second， the performance and description

· The film is especially suitable for doing binoculars ， telescopes ， cameras and video camera lens with a solar filter .

· The film is a foil ( non- polyester film ) specially manufactured streak-free and non- blister point .

* The film was in the development of sophisticated nuclear and particle physics laboratory carried out because of its very high degree of uniformity of the optical properties of the foil to obtain a glass filter having a high degree of plane-parallel .

· The foil is coated on both sides of the high-density filter ensures highly consistent ability without any pinhole effect ， so the sun can cause a very clear image with a neutral density nature of the sun to show their true " colors " : Neutral White ， rather than the blue or orange.

· Solar observation protective film AstroSolar TM coating placed under constant quality control of its reflection properties and security when direct solar observation constantly being tested Standards Agency PTB --- German national eye-safe due to meet safety standards and was awarded the "CE" mark

· Sun protection film AstroSolar TM was observed Carl - Zeiss Company (CARL / ZEISS) was chosen as a protective film filter millions eclipse observer.