Something moved during my night sky shot

[Bigshot]

Hello,

I recently want to learn night photography of the sky. I had my first experience but the results were disappointing. I have a Canon 5D Mark IV with 24-105mm 4L Canon lens. Here are the settings for my photo. Manual mode, exposure 25 s, aperture F4.0, ISO Auto. When I examine my photo (below), I found that something was moving during this long exposure but I have no clue where to look and correct. Can someone help me out? Thanks in advance.

[RobertTheFat]

---

@ebiggs1 wrote:

Most folks complain about airport noise. Funny thing about airports, and not to minimise your noisy conditions, but most time in today's airport construction they choose a place far away from populated areas. People than complain that the airport is too far or long of a drive to get to. Then housing construction and urban sprawl fills in around them. Then folks start to again complain about airport noise.

---

In 1964-65 I lived in an apartment in Boston that was in one of the takeoff patterns of Logan Airport (which was maybe four or five miles away, so the planes that flew over hadn't gained much altitude). If you weren't around then, you can't imagine how much louder commercial aircraft were then than they are now. Apparently it's due to engine efficiency; modern engines manage to put less of their energy into producing sound waves.

[FloridaDrafter]

---

@ebiggs1 wrote:

Most folks complain about airport noise. Funny thing about airports, and not to minimise your noisy conditions, but most time in today's airport construction they choose a place far away from populated areas. People than complain that the airport is too far or long of a drive to get to. Then housing construction and urban sprawl fills in around them. Then folks start to again complain about airport noise.

---

That's the way JIA is. I'm roughly 20 miles away, but it takes 40 minutes to get there, then additional time to do what you have to do, parking, shuttles, etc. Mostly motels, hotels, and shuttle services around it. As for the Naval Airstation, I like to shoot the aircraft and the only time it gets annoying is when the Blue Angels practice over my house, but that only happens 2 or 3 times a year. Non the less, I still step out into the yard and snap away 

[FloridaDrafter]

---

@TCampbell wrote:

This was shot using a Canon 135mm f/2L USM on a Canon 60Da.  The red sensitivity of a Canon 60Da is *much* stronger than a typical camera (it's the 'astrophotography' edition of the 60D).

---

I didn't even know that Canon made an astro camera until I read a review of the EOS Ra in Astronomy magazine a few months back. I considered buying it, even though I don't shoot the night sky that often, other than the Moon. I just thought it might make a good low light camera. I liked the idea of using filters in the EF adapter ring. When i do use filters, I use my wifes Cokin system, mainly ND filters.

Thank you for mentioning the 60Da.

FD

[PhotoGerry]

It looks like a excellent opportunity to photograph Mars just grazing the moon tonight.  Given the brightness of the moon it will be interesting to get the exposure looking right.  Double exposure?

Gerry

[FloridaDrafter]

---

@PhotoGerry wrote:

It looks like a excellent opportunity to photograph Mars just grazing the moon tonight.  Given the brightness of the moon it will be interesting to get the exposure looking right.  Double exposure?

Gerry

---

I do double exposeres quite a bit, but usually of the full moon with trees in the foreground. Very tricky but worth the time.

I have got some single exposures with Venus, Mars, and a thumbnail Moon in a tight triangle where the dark side of the Moon was lit. pretty awsome.

FD

[PhotoGerry]

I did try Saturn last night along with the Moon and Mars.  What is clear to me is I need to revisit my AF microadjustments on my EF 100-400mm f/4.5-5.6L IS II with the 1.4 extender, and make some tweaks.  Saturn and its rings are pretty tiny to distinquish with a sub 600mm reach. You'd need razor sharp focus to achieve it.

G