question about astro photography..??????
hi
can anybody give me advice in astrography
beginer in this field....
the advice i need is
1. what type of suitable filem ???
2. the speed
3. the aperture
4. techniques
any web site that give tutorial and examples
thanks
P/S: i just have a tripod and a camera that have B-mode(can open the aperture as long i press it with remote)
can anybody give me advice in astrography
beginer in this field....
the advice i need is
1. what type of suitable filem ???
2. the speed
3. the aperture
4. techniques
any web site that give tutorial and examples
thanks
P/S: i just have a tripod and a camera that have B-mode(can open the aperture as long i press it with remote)
Some nice astro pictures with explanation (how are they made) you will find here:
http://www.astro-photography.com/index.html
especially the images of the Moon
http://www.astro-photography.com/lunar_images.htm
and the color images of the Milky Way
http://www.astro-photography.com/color_mw.html
are really nice.
regards, Andreas
http://www.astro-photography.com/index.html
especially the images of the Moon
http://www.astro-photography.com/lunar_images.htm
and the color images of the Milky Way
http://www.astro-photography.com/color_mw.html
are really nice.
regards, Andreas
Being a beginner I can only give beginning advise.
The most important is a long exposure. Start with 30 seconds and go from there. (I have gone up to three minutes)
Make sure the Tripod is steady and not to touch it while the shutter is open. Be careful of windy days as well. I would say, (but I am not certain) to use a slower speed film. Start with a middle aperture value as well, do some bracketing and go from there. It is all about trial and error, you'd be amazed at how much you learn.
Hope this helps.
kt
The most important is a long exposure. Start with 30 seconds and go from there. (I have gone up to three minutes)
Make sure the Tripod is steady and not to touch it while the shutter is open. Be careful of windy days as well. I would say, (but I am not certain) to use a slower speed film. Start with a middle aperture value as well, do some bracketing and go from there. It is all about trial and error, you'd be amazed at how much you learn.
Hope this helps.
kt
If you want to picture the Moon (or the Sun) you need a quite strong tele, I would say at least 300mm are necessary. There are quite cheap foil-filters to make a sun-filter - but don't expect to see solar flares or such spectatcular things.
If you picture the moon, the full-moon usually gives the *worst* pictures, since there are no shadows visible therefore it looks more like a flat disk then a sphere. An ISO-100 film at around 1/25s and f/8 should give proper results with 300mm. If your camera has a Mirror-Lockup-function, you should use it (see my test: http://home.fotocommunity.de/mschopfer/ ... &d=1539951).
If you want to picture the Milkiway or star-trails, you can use a normal or even wide-angle lens. Avoid any type of light pollution (streetlights, nearby villages or even cities, the moon...).
In case you want to picture the milkyway you should use a faster film 400 or even 800, amd a fully opened aperture sice you want to collect as much light as possible in a relativeley short time (namely before the movement of the staes - resp. the rotation of the earth - becomes visible). So smaller the focal-lenght so longer exposure times are possible. Also keep in mind, that stars near the celestial equator moves faster then stars near the celestial poles - therefore you can use longer exposure times if your camera points to the north or south (near the horizon) as if it points to the east or west.
With a small focal length it's even possible to build a simple self-made mount which allows a manual tracking for longer exposure times. Or there are even Tracking systems for cameras on the market (http://www.scsastro.co.uk/library/skymemo.pdf).
If you picture the moon, the full-moon usually gives the *worst* pictures, since there are no shadows visible therefore it looks more like a flat disk then a sphere. An ISO-100 film at around 1/25s and f/8 should give proper results with 300mm. If your camera has a Mirror-Lockup-function, you should use it (see my test: http://home.fotocommunity.de/mschopfer/ ... &d=1539951).
If you want to picture the Milkiway or star-trails, you can use a normal or even wide-angle lens. Avoid any type of light pollution (streetlights, nearby villages or even cities, the moon...).
In case you want to picture the milkyway you should use a faster film 400 or even 800, amd a fully opened aperture sice you want to collect as much light as possible in a relativeley short time (namely before the movement of the staes - resp. the rotation of the earth - becomes visible). So smaller the focal-lenght so longer exposure times are possible. Also keep in mind, that stars near the celestial equator moves faster then stars near the celestial poles - therefore you can use longer exposure times if your camera points to the north or south (near the horizon) as if it points to the east or west.
With a small focal length it's even possible to build a simple self-made mount which allows a manual tracking for longer exposure times. Or there are even Tracking systems for cameras on the market (http://www.scsastro.co.uk/library/skymemo.pdf).