陽春道具的極限測試1

Chinese:

測試道具: SkyWatcher HEQ5 pro, Celestron NexGuide Autoguider+ 60220導星鏡, SkyWatcher ED80/600+ Kenko X 2 加倍鏡，Canon 7D + CLS FF filter + ISO1600

這幾樣道具其實老早都在手上，但是沒有合體測試過，眼見昨夜的天空那麼亮，很多不利條件存在，月齡14幾乎把天空照亮，視星等連北極星都看不到之下，這幾樣在天文攝影不算好的設備到底能夠發揮到如何呢?

尤其加上兩倍鏡的狀況下，赤道儀會不會拖線很大?

說實在的在測試前真的非常沒有把握!

以下這張是35分鐘的測試結果，每張只用75秒的時間，共28張疊合。因為沒有用這麼長的焦段架上赤道儀拍攝過，
所以沒有把時間拉長到更長，加上冬季的風不是穩定的吹，所以就保守點，等下次再看看更長的時間囉!

不過說實在，600 x 2(1200mm)如果加上APSC x 1.6 等同焦距是 1920mm 結果暫時讓我滿意囉!
沒想到的是，M42星雲用這樣的焦段竟然剛好把M42放到APSC的整個畫面而已...

English:

Equipments: SkyWatcher HEQ5 pro, Celestron NexGuide Autoguider+60x220mm guiding telescope, SkyWatcher ED80/600mm+ Kenko X 2 Len，Canon 7D + CLS FF filter

Reason to make this test:

1. I would like to know what is the limitation on these equipment that I have. I never put them together to take astro photo.

2. Last night moon age is day 14. Night sky was so brightness, I would like to know whether NexGuide Autoguider is still functional as normal.

3. These equipments are not the best equipment in Astro-graphic field, I try to convince myself not to buy new equipment which are very high price in market.

From the result 75 seconds x 28 frames ISO1600 on M42 nebula, I am happy with the results. Total 28 frames without trails on stars. Due to winter time in Taiwan always with unstable wing speed, only tested 75 seconds to prevent too many fail tracking result. Next time will try to test it in Spring time here for longer time period on tracking.

I am so surprise 600x2(1200mm) shooting M42 nebula can fit on APSC Canon 7D. I though it will over the CMOS size.

PHD guiding 參數設定分享

連續快兩週沒辦法拍星空，悶的發慌...來分享一下PHDguiding的設定參數好了。

目前用這些數據，感覺很穩定。

設備:

赤道儀: HEQ5 pro

主鏡: SkyWatcher Ed80 F600

導星鏡: F400

導星CCD: Meade DSI pro II

參數請看圖

如果用DSLR記得ASCOM那邊要設定600x1.6(canon) =960mm的焦長哦!

聽說很多人導600mm以上都很會拖線，我猜想某些朋友可能忘了這個重點!

這個問題是用了幾次失敗後突然想到應該換算成等同焦段來導，改過之後就準的不得了!

當然極軸還是要對準，赤道儀至少要做單星校正哦! 目前這個設定導過45分鐘左右的經驗。

奧萬大隨手拍

IMG_2014-r1，原由 光陰捕手 上載。

奧萬大路途上拍攝2010.10.10 清晨

奧萬大隨手拍

IMG_2024-r1，原由 光陰捕手 上載。

奧萬大路途上拍攝2010.10.10 清晨

奧萬大隨手拍

IMG_2019-r1，原由 光陰捕手 上載。

奧萬大路途上拍攝2010.10.10 清晨

Celestron NexGuide Autoguider testing result

This picture was using Meade DSI Pro II mono, used auto stack, 5.7 seconds each, totally 998 seconds. I did not use ENVISAGE alignment to correct rotation to see what happend on guiding result.

Currently the result is positive when found a brighter star as a guiding star.

When the sky with light pollution and visual magnitude only can see Polaris...then don't switch on, it is nothing to do...guider will not function properly due to light pollution and high noise.

I also set up PEC to HEQ5 but seems HEQ5 only can tracing without problem in 1 mins by itself. Start from 80 sec can see the delay on photos. But find a brighter star and switching on NexGuide Autoguider can have a very accuracy results even 998 seconds is still pinpoint stars.


My testing comments as below:

1. Menu is simple to understand

2. Auto Cal: faster than PHD guding, it takes around 2 to 3 mins. Normally , brighter star may down to 2 mins or less for auto cal.

3. Noise setting: read the handbook very carefully on Noise setting method. You need to reduce Noise lower to prevent guider confuse and miss guding. Adjust exprosure time and Noise to find a low noise then start guiding.

Well, hope you enjoy the accuracy guiding, this is my final testing result.


Above testing equipment:

SkyWatcher ED 80 F600

SkyWatcher A80 F400 guide scope
HEQ5 mount

Meade DSI Pro II mono CCD

NexGuide Autoguider