Sunday 23rd August Grass Valley launch

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CATO
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Re: Sunday 23rd August Grass Valley launch

Postby CATO » Wed Aug 26, 2015 7:00 am

Welcome to the forum "Grahame".
"In thrust we trust"

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Ns 19: 14,725; 18: 14,767; 17: 5,973; 16: 34,558; 15: 35,955; 14: 6,016; 13: 10,208
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Re: Sunday 23rd August Grass Valley launch

Postby drew » Wed Sep 02, 2015 4:13 pm

Viking wrote:Bloody thin overcast conditions plays havock with auto-exposure, but Drew, the mach diamonds in that Mojave! Nice!
My fav propellant too. (as far as photo's are concerned anyway)


I hear you Viking! I'm a rubbish photographer. IIRC I set the white balance to cloudy on the day. I probably should experiment with settings at launches. :/

That said the exhaust plume from Keith's Snarky upscale on that J500G is pretty sweet!

Killer shots by the way Grahame!
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Re: Sunday 23rd August Grass Valley launch

Postby OverTheTop » Wed Sep 02, 2015 4:59 pm

I set the white balance to cloudy on the day. I probably should experiment with settings at launches

Here is a good trick for metering something like this that you might like to try.
    1) Switch your camera to "manual" mode so you get control of the shutter and aperture.
    2) Choose a shutter speed you think will be suitable for the shot
    3) Assuming you are in the same lighting conditions as your subject, point your camera at your hand as you hold it in the light (not in your shadow :) ) and take the meter reading there. That will give you an exposure reading, but probably about a stop or two too dark (as your hand is lighter than an 18% grey card :wink: ). So use a setting about 1-1.5 stops more open (lower f number) to lighten up the shot to the correct exposure. About one stop is about right most of the time.
    4) If you have a Kodak 18% grey card just take the reading off that.
    5) Push the shutter button.

That's a good way of getting correct exposure when you are not at your subject, assuming similar lighting conditions.

Photographing rockets has its challenges, see if it works when you need it to.
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Re: Sunday 23rd August Grass Valley launch

Postby Viking » Wed Sep 02, 2015 5:12 pm

Yes I was fiddling with the camera dials all day due to the ever changing conditions, got a lot of worthless shots. Though the discovery of the auto-exposure lock button improved my chances of nailing a good shot later in the day.
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Re: Sunday 23rd August Grass Valley launch

Postby Lister » Wed Sep 02, 2015 6:03 pm

Just set it to manual and change exposure.

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Re: Sunday 23rd August Grass Valley launch

Postby OverTheTop » Wed Sep 02, 2015 6:15 pm

Just set it to manual and change exposure.

That's what I said earlier, but without the guesswork.
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Re: Sunday 23rd August Grass Valley launch

Postby Viking » Wed Sep 02, 2015 6:21 pm

Tried that and it made matters worse, light was changing by the second(patchy fast moving cloud) most sucessful result after much trial and error was to set to Av(big long manual lens) and then just at the end of the count down, hit the lock button(*) then shoot like crazy.
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Re: Sunday 23rd August Grass Valley launch

Postby Lister » Wed Sep 02, 2015 6:38 pm

What camera you using?

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Re: Sunday 23rd August Grass Valley launch

Postby Viking » Wed Sep 02, 2015 6:45 pm

60Da and a medium format 300mm f4 fully manual lens.
Next time I'll dust off the old 40D, it's snaps off an extra frame per second(6.5), the 60Da is only good for 5.3 frames/sec
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Re: Sunday 23rd August Grass Valley launch

Postby Lister » Wed Sep 02, 2015 7:18 pm

Thats weird. I would have thought the 60D would have better low light image capture.. have you read the destructions for using it in mixed light?

I will swap you for my nilon L830.. 2.7 shots a second but the image capture is flawless in different light condition..

I too use my hand as a metering device, works very well for low light and even night/moon photos.. also changing things like brightness and contrast values can make a massive difference.. next cloudy day have a play with it to find the best set up.

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Re: Sunday 23rd August Grass Valley launch

Postby Viking » Wed Sep 02, 2015 7:30 pm

It has awesome low light ability, this version is afterall modified by Canon for astrophotography use. Not as good low-light as the 6D though.
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Re: Sunday 23rd August Grass Valley launch

Postby Lister » Wed Sep 02, 2015 8:14 pm

Sure you dont wanna swap :)

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Re: Sunday 23rd August Grass Valley launch

Postby Ironside » Fri Sep 04, 2015 8:44 am

Interesting discussions on rocket photography, fellas. There is a common theme here

I write the QRS newsletter. We always have a page available for articles relating to rocketry matters-of-interest.

Are any of you guys interested in preparing an article on photography for rocketeers (no joke!!) for it? Normally, articles are about an A4 page with photos, diagrams etc.

Give me a PM if you are interested.
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Re: Sunday 23rd August Grass Valley launch

Postby afterburner » Sun Sep 06, 2015 12:46 pm

What I lack in skill I make up with courage.


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