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#1
27-08-2012, 02:11 AM
 04Stefan07 (Stefan) Make it so! - Capt.Picard Join Date: Jan 2012 Location: Melbourne Posts: 1,982
How embarrassing...

Got out for about 15mins tonight before the moon went behind the trees.

After my first DSLR attempt I changed the settings of my Canon 350D which should improve my images .

Settings:
Mode: Manual
Exposure: 400
ISO: 200

I took a whole heap of shots but once I had a look at them on the computer they were all black! The other night I had the exposure on bulb and when taking a photo the image would appear but when I change it to 400 it produces a black image.

Does anyone know why?

Any help would be appreciated.

Thanks!

Last edited by 04Stefan07; 27-08-2012 at 02:47 AM.
#2
27-08-2012, 05:27 AM
 gbeal Registered User Join Date: Oct 2004 Location: New Zealand Posts: 4,289
Best guess is that "400" relates to 1/400th of a second. I don't think they should be totally black, but this may not be sufficient to give an image, try something like 1/10th or 1/60th and experiment.
What do you see on the camera LCD when you take the image?
Gary
#3
27-08-2012, 06:02 AM
 iceman (Mike) Sir Post a Lot! Join Date: Sep 2004 Location: Gosford, NSW, Australia Posts: 36,707
I'd agree with Gary - 400 = 1/400s.
#4
27-08-2012, 06:46 AM
 Dennis Dazzled by the Cosmos. Join Date: May 2005 Location: Brisbane Posts: 10,723
On my Canon 40D, the sub-one second exposure settings show just a plain number and ignoring the values in-between, run something like:

8000, 4000, 2000, 1000, 500, 250, 125, 60, 30, 15, 10, 8, 4, 2 and these are for the denominator, that is, 1/xxxx so we get;

8000 = 1/8000 sec
60 = 1/60 sec.

The longer shutter speeds have an embedded ", so that:
30” = 30 secs
15” = 15 secs
4” = 4 secs
0”5 = ½ sec.

So if you see a plain number without the symbol “ then you are likely to be shooting at 1/number which is only useful for bright objects such as the Moon.

The slower shutter speeds generally only go up to 30 secs duration and so the slowest you can get under the Manual setting is 30” = 30 secs. To go longer than 30 secs you would need to use an interval timer or hold/lock the remote release manually and then release it manually after the exposure.

Cheers

Dennis
#5
27-08-2012, 07:26 AM
 bartman (Bart) 1 of 7 of 9 Join Date: Sep 2009 Location: Perth Posts: 1,968
Lens cap?
Bartman
#6
28-08-2012, 10:32 PM
 Octane (Humayun) IIS Member #671 Join Date: Dec 2005 Location: Canberra Posts: 11,159
1/400s at ISO-200, towards late in the day, will record a (virtually) blank image.

H
#7
28-08-2012, 11:15 PM
 Andy01 (Andy) My God it's full of stars Join Date: Mar 2012 Location: Melbourne Posts: 2,103
Maybe the Mirror is in pre-shoot, vibration reduction lockup mode and the shutter is not actually firing? Test it in daylight : )
#8
28-08-2012, 11:34 PM
 04Stefan07 (Stefan) Make it so! - Capt.Picard Join Date: Jan 2012 Location: Melbourne Posts: 1,982
Thanks everyone!

Had a little test of it tonight, just taking photos of the lounge room. The shutter speed had to be on around 10-100 to get an image.

When it was set to 400 when I had it pointed at the moon the other night I thought the image wouldn't be blank cause the moon is bright!

Ahh, still learning hopefully I will get there!!

I still need to get a tripod so I can take photos of the moon with my high powered lens. Apparently I cannot get prime focus with my 130 SLT after doing heaps of research on it! You either have to buy a new focuser or move the primary mirror a few cm forward so hopefully with my high power lens on a tripod I can get some decent shots!

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