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maflynn Oct 28, 2004 7:09 AM

Newbie question.
I just picked up a 300mm lens for my d70, one reason was for the lunar eclipse. I played with the shutter speed and apeture to get some half decent results but early on when I tried using the camera's night preset setting I was getting this double images.

What's the explanation for this

Here's a couple of examples of the good photos.
Lunar Eclipse
Any hints or suggestions to make these photos better


Tom LaPrise Oct 28, 2004 7:19 AM

Looks like an internal reflection in the lens.

To shoot the moon, use the same settings you would use for a "sunny" scene--the sky itself is dark, but the moon is in bright sunlight. The "sunny 16" rule is handy here: Shutter speed 1/ISO at aperture f/16, and you can trade off between the two.

For example, at ISO 100:

1/100, f/16
1/200 (or 1/250, depending on your camera), f/11
1/400 (or 1/500), f/8
1/800 (or 1/1000), f/5.6

The eclipse might have needed a couple of stops more exposure than that.

maflynn Oct 28, 2004 8:38 AM

Thanks for the info, I was wondering what had happened.

At first I seemed to get some pretty good results when I played with the apeture and shutter speed but viewing the image full size I noticed the moon is a little blurry.

I had not touched the ISO setting on the camera and let the camera lock and focus itself. Was this blurriness a result of improper focus, or settings that I failed to manually set correctly. I almost forgot to say I was using a tripod, not a hugely expensive one but what I thought was pretty good. could this be the culprit also (I was using the remote switch to snap the picute thus the camera was untouched).

Thanks again

eric s Oct 28, 2004 9:30 AM

What was your shutter speed?

One thing that will effect things is mirror slap. You are taking a picture of something which is really far away. The normal way to do things don't work as well because any small movement has a larger effect due to the distance.

So to take pictures of the moon you really want to do as much as you can to reduce shake. The best tripod and head, use a timer to release the shutter, set mirror lockup (I don't know if the D70 has mirror lockup, but it might.)

This would be my guess.


luisr Oct 28, 2004 11:27 AM

Long exposures will also show the Moon's movement.

maflynn Oct 28, 2004 11:32 AM

That's probably it, in playing with the settings to produce eliminate the pesky double image, I slowed the shutter speed down.

Next full moon and I'll work on some different combinations.


bradg Oct 28, 2004 6:15 PM

what lens was it? was it a 300 prime? f/2.8? af-is? nikon, sigma?

just curious...

hedwards Oct 28, 2004 6:17 PM

Looks like what used to happen to me when i forgot to remove the UV filter. :?

maflynn Oct 28, 2004 6:38 PM

hedwards wrote:

Looks like what used to happen to me when i forgot to remove the UV filter. :?
You mean your supposed to remove them for night shots?

Well you learn something new everyday.

I keep it on there to protect the lens :)

croftfam Oct 28, 2004 9:06 PM

I think I'm using the exact same setup as you, and I got the exact same results. Tonight, I'm taking off the filter. I also was keeping it on for lens protection.

I'm totally new to this!

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