多事! 不談我的器材. [熱] [熱] [熱]cwlam 寫:老闆聽說你都有支高橋喎! 係乜嚟架?funoooo 寫:轉手升級至 FSQ-85 啦！ [萬年奸臣] [萬年奸臣] [萬年奸臣]
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哈哈~ 你講乜都毒害唔到我架喇...Anyone 人氣上得咁快, 又勤力又積極, 事實又值得入多支好野既......就算唔高橋都入多一兩支 TMB/APM/AP/TEC 啦....BossKwan 寫:opa 寫:我影果張馬頭未必完全可作支鏡質素參考...部份 color channel 對焦唔算太準, ccd 像素得 1M 左右, 張相 100% full size, 又冇用 PS 收身...
我日後會盡量多點用呢支鏡拍攝, 希望可以有進步交到功課....
最主要...自己祗係業餘玩玩下, 唔使一定要買到最貴最好既...
大王其他的架生，就真唔似玩玩下禁簡單......
大王，其中之一我要向你學習的，就是 " 百毒不侵 " ！opa 寫:哈哈~ 你講乜都毒害唔到我架喇...Anyone 人氣上得咁快, 又勤力又積極, 事實又值得入多支好野既......就算唔高橋都入多一兩支 TMB/APM/AP/TEC 啦....BossKwan 寫:opa 寫:我影果張馬頭未必完全可作支鏡質素參考...部份 color channel 對焦唔算太準, ccd 像素得 1M 左右, 張相 100% full size, 又冇用 PS 收身...
我日後會盡量多點用呢支鏡拍攝, 希望可以有進步交到功課....
最主要...自己祗係業餘玩玩下, 唔使一定要買到最貴最好既...
大王其他的架生，就真唔似玩玩下禁簡單......
agree! agree! agree! [微笑] 支持溫爺買多支.opa 寫:哈哈~ 你講乜都毒害唔到我架喇...Anyone 人氣上得咁快, 又勤力又積極, 事實又值得入多支好野既......就算唔高橋都入多一兩支 TMB/APM/AP/TEC 啦....BossKwan 寫:opa 寫:我影果張馬頭未必完全可作支鏡質素參考...部份 color channel 對焦唔算太準, ccd 像素得 1M 左右, 張相 100% full size, 又冇用 PS 收身...
我日後會盡量多點用呢支鏡拍攝, 希望可以有進步交到功課....
最主要...自己祗係業餘玩玩下, 唔使一定要買到最貴最好既...
大王其他的架生，就真唔似玩玩下禁簡單......
![[Good Job]](./images/smilies/onion_d5f02ecd.gif "Good Job")
支持 ? 打算津貼小弟多少？最好不少於一半！嘻嘻！funoooo 寫:agree! agree! agree! [微笑] 支持溫爺買多支.opa 寫:哈哈~ 你講乜都毒害唔到我架喇...Anyone 人氣上得咁快, 又勤力又積極, 事實又值得入多支好野既......就算唔高橋都入多一兩支 TMB/APM/AP/TEC 啦....BossKwan 寫:opa 寫:我影果張馬頭未必完全可作支鏡質素參考...部份 color channel 對焦唔算太準, ccd 像素得 1M 左右, 張相 100% full size, 又冇用 PS 收身...
我日後會盡量多點用呢支鏡拍攝, 希望可以有進步交到功課....
最主要...自己祗係業餘玩玩下, 唔使一定要買到最貴最好既...
大王其他的架生，就真唔似玩玩下禁簡單......
![[交出來]](./images/smilies/onion_233cd70a.gif "交出來")
鄧登凳 寫:I am willing to pay 55% of your buying price.
[笑裡藏刀]
I am definitely willing to TOLERATE the poor results as BossKwan mentioned. Poor man like me can live with results like this one taken by Mr Sabaru using SKY90.
我說Sky90是ordinary不表示差，是up to standard 或意思 up to ED 鏡 standard，因為許多便宜鏡子都達這水平，也上一張由另一位新秀拍攝的M31作比較，用cheap許多的ED鏡子拍攝，大家只看看星點成像水平，很相近吧? 此照還是用"盲跟"方式拍攝，只是曝光不足，不同拍攝環境，和不及Sabaru 的大帥級處理。 
鄧登凳 寫:Dear BossKwan,
Nothing against Ryan or the SkyRover you are selling.
However, even with the much smaller in size reduction, the stars at the four corners suffer significant "elongation" as a result of field curvature.
So as far as I can see, it is still some distance from the Sky90.
Regards,
Tang
I have mentioned before the images were taken under using "盲跟" that caused what you see the "elongation"Besides, no flatener was used with the scope.
No, that is not tracking error. The elongations are at different directions but all pointing towards the centre. It is the typical problem of field curvature.
Takahashi produces flatteners / reducers specifically for thier different telescopes. That is the fact that they care for the needs of astrophotographers.
The problem with these much cheaper versions is that the manufacturers don't care for what astrophotographers need, so they do not make/design flatteners that match their products.
However, if one cannot afford Sky90 or do not want to spend that sort of money, one has to comprimise performance with price. Given that, SkyRover may not be a bad choice.
Takahashi produces flatteners / reducers specifically for thier different telescopes. That is the fact that they care for the needs of astrophotographers.
The problem with these much cheaper versions is that the manufacturers don't care for what astrophotographers need, so they do not make/design flatteners that match their products.
However, if one cannot afford Sky90 or do not want to spend that sort of money, one has to comprimise performance with price. Given that, SkyRover may not be a bad choice.
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