wide lens help, looking up!
Jul 28, 2014 13:28:55 #
Hey guys iv recently been looking up at the stars and been playing with the lenses that iv got.now I'm a Canon user (please that's not my problem ;) ).I know f stop is a big factor and unfortunately my wide angle lense is f4 17-40 mmL but I do have a 24-70mmL but I find 28mm isn't enough.iv also lately been playing with vintage lenses, what's that got to do with this subject you ask? Well while having a play I put my asahi pentax m42 mount 50mm f1.4 that's adapted to canon on and had some amazing results that I thought I wouldn't get but hey come out better than my L series lenses.maybe the speed? Now I'm looking at ruffle 17 mm at 1.4 can I dream? Do they even exist? IV only found wide lenses in that range at 28- 35mm.any help is appreciated.
Jul 29, 2014 07:02:17 #
Aren't the stars photographically in a plane at infinity? If so, why not go for the sweet spot with your aperture? Say, around f/8? If the moon is not in the frame, speed should not be a factor. (It's a very bright image if it is in frame.)
Jul 29, 2014 07:37:13 #
JP/Avery wrote:
Hey guys iv recently been looking up at the stars ... (show quote)
Look at the Ronikon 14 mm & 24 mm lens Manual focus but they are recommended for night sky photography and their f-stop is 2.8 & 1.4 respectively
Jul 29, 2014 08:51:01 #
lighthouse
Loc: No Fixed Abode
mborn wrote:
Look at the Ronikon 14 mm & 24 mm lens Manual focus but they are recommended for night sky photography and their f-stop is 2.8 & 1.4 respectively
:thumbup: :thumbup:
But the spelling would be Rokinon, same as Samyang but different badge.
Jul 29, 2014 08:51:11 #
When shooting stars you generally need f2.8 or faster and the can't be present as the stars aren't bright.when shooting the moon a high f stop helps because ur practically taking a photo of a light.
Patw28 wrote:
Aren't the stars photographically in a plane at infinity? If so, why not go for the sweet spot with your aperture? Say, around f/8? If the moon is not in the frame, speed should not be a factor. (It's a very bright image if it is in frame.)
Jul 29, 2014 08:53:31 #
I'm looking into a row in a or samyang I just didn't know how they would preform.after seeing your shot which is fantastic by the way I think I'll purchase one.
mborn wrote:
Look at the Ronikon 14 mm & 24 Manual focus but they are recommended for night sky photography and their f-stop is 2.8 & 1.4 respectively
Jul 29, 2014 09:14:37 #
lighthouse wrote:
:thumbup: :thumbup:
But the spelling would be Rokinon, same as Samyang but different badge.
But the spelling would be Rokinon, same as Samyang but different badge.
You are correct also a Bower All the same model but different labels
Jul 29, 2014 11:19:06 #
JP/Avery wrote:
When shooting stars you generally need f2.8 or faster and the can't be present as the stars aren't bright.when shooting the moon a high f stop helps because ur practically taking a photo of a light.
I still don't understand why you need a fast lens.
You're on a tripod.
The stars are not moving.
Why are you not shooting at f/8!
What do you care if the exposure is 20 seconds?
If it's a comet or meteor shower, you want the extended streak(s).
Shoot slow. Shoot closed down.
If it's the moon, you can practically hand hold it.
Jul 29, 2014 11:59:01 #
Patw28 wrote:
I still don't understand why you need a fast lens.
You're on a tripod.
The stars are not moving.
Why are you not shooting at f/8!
What do you care if the exposure is 20 seconds?
If it's a comet or meteor shower, you want the extended streak(s).
Shoot slow. Shoot closed down.
If it's the moon, you can practically hand hold it.
You're on a tripod.
The stars are not moving.
Why are you not shooting at f/8!
What do you care if the exposure is 20 seconds?
If it's a comet or meteor shower, you want the extended streak(s).
Shoot slow. Shoot closed down.
If it's the moon, you can practically hand hold it.
Remember the stars and moon are moving an exposure longer then 30 sec. on stars will start to get star trails rather then point of light and less the 1/30 sec will give moon blurs
Jul 29, 2014 13:37:56 #
OK a tripod is a must in this type of photography along with a remote to avoid camera shake.
Now the stars always move with the earth rotation, not naked to the human eye but our dslr can pick it up.so 30 sec or less exposure is a must or the stars no longer are dots but over in shape.
why now f8? Yes generally shooting in f8 especially in landscape photography makes everything more in focus.but in star gazing since your subject is a black canvas you need as much light as possible . hence the fast f stop 1.4 or your shots at f8 will need an exposure of let's say 1 minute 30.as I stated before that's fare to long and that cluster of stars you see in the photo above can't be seen . I hope this helps you out but if not there are plenty of tutorials on the Web about this subject.
Now the stars always move with the earth rotation, not naked to the human eye but our dslr can pick it up.so 30 sec or less exposure is a must or the stars no longer are dots but over in shape.
why now f8? Yes generally shooting in f8 especially in landscape photography makes everything more in focus.but in star gazing since your subject is a black canvas you need as much light as possible . hence the fast f stop 1.4 or your shots at f8 will need an exposure of let's say 1 minute 30.as I stated before that's fare to long and that cluster of stars you see in the photo above can't be seen . I hope this helps you out but if not there are plenty of tutorials on the Web about this subject.
Patw28 wrote:
I still don't understand why you need a fast lens.
You're on a tripod.
The stars are not moving.
Why are you not shooting at f/8!
What do you care if the exposure is 20 seconds?
If it's a comet or meteor shower, you want the extended streak(s).
Shoot slow. Shoot closed down.
If it's the moon, you can practically hand hold it.
You're on a tripod.
The stars are not moving.
Why are you not shooting at f/8!
What do you care if the exposure is 20 seconds?
If it's a comet or meteor shower, you want the extended streak(s).
Shoot slow. Shoot closed down.
If it's the moon, you can practically hand hold it.
Jul 29, 2014 14:37:07 #
Jul 29, 2014 15:33:12 #
TheDman
Loc: USA
Patw28 wrote:
Aren't the stars photographically in a plane at infinity? If so, why not go for the sweet spot with your aperture? Say, around f/8?
Because stars move too, and you need all the light you can get to avoid turning the stars into streaks.
Jul 29, 2014 15:35:09 #
TheDman
Loc: USA
Patw28 wrote:
I still don't understand why you need a fast lens.
You're on a tripod.
The stars are not moving.
Why are you not shooting at f/8!
What do you care if the exposure is 20 seconds?
You're on a tripod.
The stars are not moving.
Why are you not shooting at f/8!
What do you care if the exposure is 20 seconds?
If you shoot at f8 the exposure will be something like 3 minutes, the earth will have rotated, and your stars are now short lines.
Jul 29, 2014 18:53:55 #
Jul 29, 2014 19:01:23 #
Good explanation, JP!
I'm enjoying a good laugh at myself. Of course the stars are fixed. But we're moving! End of confusion.
Hope you find what you're after.
I gave up my 8" years ago. Just got too dad-burned cold!
Enjoyed the exchange and got my head straightened in the process.
I wish you well!
I'm enjoying a good laugh at myself. Of course the stars are fixed. But we're moving! End of confusion.
Hope you find what you're after.
I gave up my 8" years ago. Just got too dad-burned cold!
Enjoyed the exchange and got my head straightened in the process.
I wish you well!
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