In search of partner, flattener, for APM-LOMO 80/480

Equipment (Visual Accessories) - 各類目鏡、濾鏡等目視光學配件

Re: In search of partner, flattener, for APM-LOMO 80/480

文章

willis » 2011-02-09, 00:45

社長 寫:有一疑問,"The light drop at the corner is about 79% that of the centre." 其實是21%或79% ?


Another typo & corrected. Should be light illumination, instead of light drop. Will I be bitten this time? :? :? :?
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
頭像
willis
全域版主
 
文章: 1520
註冊時間: 2010-02-01, 17:50
來自: HK

Re: In search of partner, flattener, for APM-LOMO 80/480

文章社長 » 2011-02-09, 00:53

come on!

不做不錯,做事就一定會出點錯。

我自己出的報告也經常有些盲點,人家提醒才能改過來。

我到超市買食物,會選些新鮮的,對自己有益的。看人家報告也一樣。

什麼時候可以做80/600的?
兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
主鏡 - Officina Stellare 500 口徑f3.8 RiFast攝星儀、APM/TMB 254 f9 APO、SkyWatcher Dob 18、305 f8.5 牛頓鏡、Paramount ME 赤道儀
配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
星河科研社 http://www.astro.hk 電郵 saviofong@astro.hk
頭像
社長
Site Admin
 
文章: 12685
註冊時間: 2010-02-01, 14:17
來自: 香港

Re: In search of partner, flattener, for APM-LOMO 80/480

文章willis » 2011-02-09, 01:10

社長 寫:什麼時候可以做80/600的?


Very busy! Maybe tomorrow!
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
頭像
willis
全域版主
 
文章: 1520
註冊時間: 2010-02-01, 17:50
來自: HK

Re: In search of partner, flattener, for APM-LOMO 80/480

文章funoooo » 2011-02-09, 21:02

I'm waiting tehreport also. That will help me to make the big decision. :lol:
funoooo
 
文章: 926
註冊時間: 2010-02-04, 11:13
來自: 香港

Re: In search of partner, flattener, for APM-LOMO 80/480

文章sharkfin » 2011-03-16, 22:12

thanks for those experiments and testes, i wish i could come that sat, (sat is not a holiday for me)
and thanks willis for the report

Borg 7887 got strange result...

as I was a research student, it's not surprised that experiment and real life test (in vitro vs in situ) aways show different results (especially in my medical field), it's always multifactorial. :?:

seems optic research may got similar situation :? , sometimes frustrating, or we should be excited as there maybe something new which need investigation :o

and as I still a newb in astro, and still learning observation, and waiting for clear sky, i am not hurry for photography yet :lol:

add oil for all of us ;)
sharkfin
 
文章: 43
註冊時間: 2010-05-05, 21:36

Re: In search of partner, flattener, for APM-LOMO 80/480

文章willis » 2011-03-17, 12:31

The sky this week may not be good anyway. The moon phase is not good for DSI also. Wish the sky turns good next weekend & we can do the test again.
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
頭像
willis
全域版主
 
文章: 1520
註冊時間: 2010-02-01, 17:50
來自: HK

Re: In search of partner, flattener, for APM-LOMO 80/480

文章社長 » 2011-03-17, 23:00

按理光學測試是很單簡及直觀的測試,這次有點出乎意料,當然也是學習過程之一。

若日後我造一套平行光管,便會理想得多了,例如買一枝130/1200APO加個點光源便可以。

論平場鏡,以80/480計,我更看重Zero Power的TS2,因為焦距夠短了,光圈也不小,減焦鏡只是錦上添花而已。
兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
主鏡 - Officina Stellare 500 口徑f3.8 RiFast攝星儀、APM/TMB 254 f9 APO、SkyWatcher Dob 18、305 f8.5 牛頓鏡、Paramount ME 赤道儀
配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
星河科研社 http://www.astro.hk 電郵 saviofong@astro.hk
頭像
社長
Site Admin
 
文章: 12685
註冊時間: 2010-02-01, 14:17
來自: 香港

Re: In search of partner, flattener, for APM-LOMO 80/480

文章社長 » 2011-03-21, 00:41

Cloudynights Feb11 DSLR Challenge Winner - IC443 Jellyfish nebula

80/480 with Televue 0.8x reducer :

http://www.cloudynights.com/ubbthreads/ ... ll/fpart/1
兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
主鏡 - Officina Stellare 500 口徑f3.8 RiFast攝星儀、APM/TMB 254 f9 APO、SkyWatcher Dob 18、305 f8.5 牛頓鏡、Paramount ME 赤道儀
配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
星河科研社 http://www.astro.hk 電郵 saviofong@astro.hk
頭像
社長
Site Admin
 
文章: 12685
註冊時間: 2010-02-01, 14:17
來自: 香港

Re: In search of partner, flattener, for APM-LOMO 80/480

文章Nebulas » 2011-03-21, 13:26

社長 寫:按理光學測試是很單簡及直觀的測試,這次有點出乎意料,當然也是學習過程之一。

若日後我造一套平行光管,便會理想得多了,例如買一枝130/1200APO加個點光源便可以。

論平場鏡,以80/480計,我更看重Zero Power的TS2,因為焦距夠短了,光圈也不小,減焦鏡只是錦上添花而已。


最近身边朋友的这支镜子到了,还没有过去看, 上次去他那还说 Flattener 的事情。

PV = 0.08 , Seems beautiful!
以前看书学天文,后来用望远镜学习天文,现在用纸笔想象天文!
頭像
Nebulas
 
文章: 1927
註冊時間: 2010-04-08, 12:36
來自: Wuhan, Hubei Province, P.R.China

Re: In search of partner, flattener, for APM-LOMO 80/480

文章willis » 2011-03-21, 16:00

Sorry! What is PV?
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
頭像
willis
全域版主
 
文章: 1520
註冊時間: 2010-02-01, 17:50
來自: HK

Re: In search of partner, flattener, for APM-LOMO 80/480

文章社長 » 2011-03-21, 18:13

PV = Surface peak to valley error in units of wavelength
兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
主鏡 - Officina Stellare 500 口徑f3.8 RiFast攝星儀、APM/TMB 254 f9 APO、SkyWatcher Dob 18、305 f8.5 牛頓鏡、Paramount ME 赤道儀
配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
星河科研社 http://www.astro.hk 電郵 saviofong@astro.hk
頭像
社長
Site Admin
 
文章: 12685
註冊時間: 2010-02-01, 14:17
來自: 香港

Re: In search of partner, flattener, for APM-LOMO 80/480

文章社長 » 2012-12-26, 00:51

德國的測試:LOMO 80/480 + TS2:

http://www.astro-foren.de/showthread.ph ... S-Flattner
兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
主鏡 - Officina Stellare 500 口徑f3.8 RiFast攝星儀、APM/TMB 254 f9 APO、SkyWatcher Dob 18、305 f8.5 牛頓鏡、Paramount ME 赤道儀
配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
星河科研社 http://www.astro.hk 電郵 saviofong@astro.hk
頭像
社長
Site Admin
 
文章: 12685
註冊時間: 2010-02-01, 14:17
來自: 香港

上一頁

回到 儀器 - 目視光學配件

誰在線上

正在瀏覽這個版面的使用者:沒有註冊會員 和 1 位訪客

cron