canon powershot s3 IS

[wilsontie]

saya nak cadang beli satu digital camera untuk gambar seharian dan juga untuk astrophotography....dan saya cadang nak beli canon powershot s3 IS...(sebab tak cukup wang untuk beli dslr...mahal sangat dan saya masih seorang beginne...)

manual exposurenya sampai 15 s(as most canon DC)

cukupkah 15s untuk tangkap gambar buruj？？？
star trails show at 15s or not ??

[perseid]

Pendapat saya, camera tu tak sesuai untuk astrophotography. Ada banyak sebab, tapi yang utamanya
1. Exposure terlalu pendek
2. IS mode tak boleh digunakan untuk astrophotography. Kalau boleh tutup IS, mungkin OK.
3. Terhad untuk objek terang sahaja (bulan, planet, buruj)
Nak ambil star trail, OK, tetapi kena ambil banyak gambar, sebab exposure 15 saat.

Saya tak tahu harga kamera ini, tapi rasanya lebih kurang RM1500. Kenapa tak tambah sikit. DSLR sekarang kurang dari RM3K. Yang second hand, macam Canon 300D boleh dapat kurang dari RM2K.

Dari semua aspek, DSLR lebih baik untuk astrophotography dan untuk mengambil gambar harian.

[wilsontie]

thanks for ur opinion.

may i know why the IS mode can't be used in astrophotography??

[perseid]

I tried but fail to find the forum where there were discussion on the IS in astrophotography.
IF I can remember well, the main bad point of IS is that due to its design and feedback system, it will introduce "shake" to the image when taking astrophotography. The lens is design to "expect" vibration from our hand, but when taking astrophotography, we usually attached the  camera to tripod, which will hold the camera steady. When the camera sees this, it will generate false feedback that will cause the image to shake.
The IS will also drain your battery power, as there is continuous feedback between the camera and the lens.
I noticed that the canon IS camera you are looking for can switch off the IS function, which is good, if you find that the IS is not working well in astrophotography.