電焊工用的那種鏡片可以用來減光不?
- david_kmng
- 白矮星
- 文章: 960
- 註冊時間: 週五 11 7月, 2003 00:10
- 來自: 草根階層
便宜的很哈,僅僅1.5元人民幣我買的是9&
david_kmng 寫:理論上 14號可以安全用於目視, 但不可用在望遠鏡前. 不過能否買到指定的14號則是個疑問. 小心
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- 夸克星
- 文章: 3847
- 註冊時間: 週四 09 10月, 2003 21:06
Re: 電焊工用的那種鏡片可以用來減光不
Dear Solar lovers,yading 寫:我小時候用來看太陽覺得太陽的亮度還不及月亮!
Welding glass can be safely used to view the sun in direct vision. It has a very high attenuation of the incident light intensity.
At a price of HKD 3, it has a dimemsion of about 2" X 4", making it a good filter to place in front of the both object lens of SMALL ROOF PRISM BINOCULARS.
The optical quality of welding glass is MUCH MUCH better than Baader film, still better than the Tuthill SOLAR SKREEN..... actually it is MUCH better than aluminium reflection type filter. The contrast of welding glass is very high.
Try this on Venus transit today, if the weather permits.
Best regards
Chan Yuk Lun
http://www.astronomy.com/community/foru ... IC_ID=8636
不要用於望遠鏡呀!
外國的forum都好多人話用來單純目視仲ok,但落望遠鏡的危機大好多!
呢個天文台網頁甚至叫大家不要用電焊濾鏡來看太陽!!
http://www.cpither.freeserve.co.uk/obse ... he_sun.htm
雙眼比一塊安全太陽濾鏡的價錢比較,還是小心為上
不要用於望遠鏡呀!
外國的forum都好多人話用來單純目視仲ok,但落望遠鏡的危機大好多!
呢個天文台網頁甚至叫大家不要用電焊濾鏡來看太陽!!
http://www.cpither.freeserve.co.uk/obse ... he_sun.htm
雙眼比一塊安全太陽濾鏡的價錢比較,還是小心為上
最後由 Wah! 於 週二 08 6月, 2004 10:38 編輯,總共編輯了 1 次。
至於Baader的薄膜光學質素,可以參考佢個網頁:
http://www.baader-planetarium.com/sofif ... sung_e.htm
http://www.baader-planetarium.com/sofif ... sung_e.htm
誰在線上
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