Woo..still no people reply
Jonie
有 16 筆資料符合您搜尋的條件
- 週二 24 3月, 2009 21:12
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Hi, Anyone knows ..Fast primary
- 回覆: 3
- 觀看: 2641
- 週二 24 2月, 2009 21:44
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: how to choose the thickness of the glass?
- 回覆: 2
- 觀看: 2236
how to choose the thickness of the glass?
Hi
What is the element to decide how thickness of the glass for primary ?
thanks,
Jonie
What is the element to decide how thickness of the glass for primary ?
thanks,
Jonie
- 週二 24 2月, 2009 18:15
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Hi, Anyone knows ..Fast primary
- 回覆: 3
- 觀看: 2641
Hi, Anyone knows ..Fast primary
Dear everybody,
Fast mirror like F/O:2 or F/O:3?
What is the benifit for fast mirror as a telescopes?
Thanks,
Jonie
Fast mirror like F/O:2 or F/O:3?
What is the benifit for fast mirror as a telescopes?
Thanks,
Jonie
- 週日 15 2月, 2009 19:24
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: 磨鏡班
- 回覆: 9
- 觀看: 4912
如何參加磨鏡班
您好,
我也有興趣參加,請問如何報名,費用多少?
磨鏡班每次只有二天嗎?
我也有興趣參加,請問如何報名,費用多少?
磨鏡班每次只有二天嗎?
- 週二 03 2月, 2009 18:16
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: what to visit to Mr. Chan Yuk Lun
- 回覆: 3
- 觀看: 2769
want to visit Mr.Chan Yuk Lun
Dear Mr. Chan Yuk Lun,
Thank you,
How to meet you?
May I have your moible number ?
and What metro stop to meet you better?
Thanks,
Chenchi
Thank you,
How to meet you?
May I have your moible number ?
and What metro stop to meet you better?
Thanks,
Chenchi
- 週二 03 2月, 2009 18:14
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: what to visit to Mr. Chan Yuk Lun
- 回覆: 3
- 觀看: 2769
want to visit Mr.Chan Yuk Lun
Dear Mr. Chan Yuk Lun,
Thank you,
How to meet you?
May I have your moible number ?
and What metro stop to meet you better?
Thanks,
Chenchi
Thank you,
How to meet you?
May I have your moible number ?
and What metro stop to meet you better?
Thanks,
Chenchi
- 週二 03 2月, 2009 09:01
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Why Cassegrain telescopes have longer Focal Length?
- 回覆: 4
- 觀看: 3071
Why Cassegrain telescopes have longer Focal Length?
Hi,
I do read article by search on Google.
But I can't find answer WHY?
Do you know why Cassegrain telescopes do have longer focal length and have no shorter focal length?
Thanks,
Chenchi
I do read article by search on Google.
But I can't find answer WHY?
Do you know why Cassegrain telescopes do have longer focal length and have no shorter focal length?
Thanks,
Chenchi
- 週一 02 2月, 2009 23:15
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Why Cassegrain telescopes have longer Focal Length?
- 回覆: 4
- 觀看: 3071
Why Cassegrain telescopes have longer Focal Length?
Dear sirs,
I am study Cassegrain telescope's structure.
Does anyone know how the light work on cassegrain telescopes and why Cassegrain have longer focal length?
Does any chinese webiste that I can read and understandd about specification of telescopes if I want to buy.
thanks,
Chenchi
I am study Cassegrain telescope's structure.
Does anyone know how the light work on cassegrain telescopes and why Cassegrain have longer focal length?
Does any chinese webiste that I can read and understandd about specification of telescopes if I want to buy.
thanks,
Chenchi
- 週一 02 2月, 2009 17:01
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: what to visit to Mr. Chan Yuk Lun
- 回覆: 3
- 觀看: 2769
what to visit to Mr. Chan Yuk Lun
Dear Mr. Chan Yuk Lun,
Happy Chinese New Year!
May I have chance to visit you and ask some questions kindly?
I plan to go HK this weekend and visit you on 2/7 in the morning.
And if I have more questions , I can visit you next days.
Many Thanks,
Chenchi
Happy Chinese New Year!
May I have chance to visit you and ask some questions kindly?
I plan to go HK this weekend and visit you on 2/7 in the morning.
And if I have more questions , I can visit you next days.
Many Thanks,
Chenchi
- 週五 16 1月, 2009 22:39
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: What is circular storke by sub-diameter tool
- 回覆: 4
- 觀看: 3286
About visit and class
Dear Mr. Chan Yuk Lun,
Many thanks for your welcome visiting. I will let you know when will I be availabe to go.
About class-
will you have chance to have class soon? I read about the ATM class every year. When will be on 2009?
Many Thanks,
Chenchi
Many thanks for your welcome visiting. I will let you know when will I be availabe to go.
About class-
will you have chance to have class soon? I read about the ATM class every year. When will be on 2009?
Many Thanks,
Chenchi
- 週三 14 1月, 2009 21:42
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: What is circular storke by sub-diameter tool
- 回覆: 4
- 觀看: 3286
30" polish by sub-diameter
Dear Mr. Chan Yuk Lun, Thanks for your reply! I would like to know more details about the stroke that you do by polishing. How is your way to move the arm? Does your table rotate automaticly or by hand? Is your sub-diameter pitch lap match the surface of glass? Match the saggita of the glass? Also 3...
- 週日 11 1月, 2009 22:17
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: What is circular storke by sub-diameter tool
- 回覆: 4
- 觀看: 3286
What is circular storke by sub-diameter tool
Dear Mr. Chan Yuk Lun,
I read your article about making 30" mirror by subdiameter tool to polish. What is the stroke of circular stroke move by 17.5" pitch tool?
Center to center or ...
Many thanks,
Chenchi
I read your article about making 30" mirror by subdiameter tool to polish. What is the stroke of circular stroke move by 17.5" pitch tool?
Center to center or ...
Many thanks,
Chenchi
- 週四 18 12月, 2008 22:54
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: 30 inch mirror remaking - 19, mirror finished.
- 回覆: 7
- 觀看: 6806
About sub-diameter pitch lap
Hi,
I am very impressed that you make 30" glass.
Do you use sub-diameter to do polishing?
It will be great to hear your experience to polish that big glass.
How is your way to make pitch lap for that big?
Thanks,
Chenchi,Yen
I am very impressed that you make 30" glass.
Do you use sub-diameter to do polishing?
It will be great to hear your experience to polish that big glass.
How is your way to make pitch lap for that big?
Thanks,
Chenchi,Yen
- 週四 18 12月, 2008 00:31
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: questions about figuring
- 回覆: 2
- 觀看: 2727
about figuring
Dear Chan Yuk Lun ,
Thanks for your reply.
Do you know anywebsite to teach how to read ronchi grating?
Such as teach you how to read and supply for what stroke to fix?
My mirror has been figured for long time and line is gone very bad.
Have many zone, I have no idea to figure.
Cheers!
Chenchi
Thanks for your reply.
Do you know anywebsite to teach how to read ronchi grating?
Such as teach you how to read and supply for what stroke to fix?
My mirror has been figured for long time and line is gone very bad.
Have many zone, I have no idea to figure.
Cheers!
Chenchi
- 週五 28 11月, 2008 01:12
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: questions about figuring
- 回覆: 2
- 觀看: 2727
questions about figuring
Hello,
I am an ATM in Taiwan. I am making the mirror myself.
but I have problem that my glass has TDE.
How to fix the turn down edge? What is the best way to get "straight" ronchi grating?
Many thanks,
Chenchi, Yen
I am an ATM in Taiwan. I am making the mirror myself.
but I have problem that my glass has TDE.
How to fix the turn down edge? What is the best way to get "straight" ronchi grating?
Many thanks,
Chenchi, Yen