Post your uncropped sun/moon shots with foc. lngth

01/09/2012 05:39:13 PM · #26

I just wrote this to a friend who may travel with me to Albuquerque, NM on May 20, 2012.

Albuquerque, NM is on the path of totality. //eclipse.gsfc.nasa.gov/SEgoogle/SEgoogle2001/SE2012May20Agoogle.html

//www.nasa.gov/mission_pages/sunearth/news/news20110106-annulareclipse.html

May 20, 2012

//www.usno.navy.mil/USNO/astronomical-applications/data-services/alt-az-us

At the moment 18:30 of maximum eclipse, the sun will be at 6.4 degrees altitude 290.4 North of East

FourPointX

Canon EOS-60D

Canon EF 50mm f/1.8 II

01/10/2012 08:30:25 AM · #27

Originally posted by FourPointX:

Originally posted by DrAchoo:

Originally posted by FourPointX:
tonight's moonrise uncropped 33mm equiv.

Do you mean 330mm equivalent?

it's a point and shoot 5-100mm the exif reads 33.7mm?

Jason/Anyone - since I obviously haven't a clue how to determine my focal length nor equivalent with my camera, is there a simple explanation of how to determine it/measure it?

Canon RF 24-70mm f/2.8 L IS

01/10/2012 08:59:25 AM · #28

Originally posted by FourPointX:

Jason/Anyone - since I obviously haven't a clue how to determine my focal length nor equivalent with my camera, is there a simple explanation of how to determine it/measure it?

...the optically stabilized 20X zoom lens on the SX10 IS covers a 35mm film equivalent focal range from 28 to 560mm...

Your exif data from your image indicates 33.7 mm focal length. The size of the moon looks to be about 300+ focal length (35mm. equivalent). You could use a rough rule-of-thumb of 10 times whatever your exif data says.

kirbic

Canon EOS R5

01/10/2012 09:53:47 AM · #29

Originally posted by hahn23:

[quote=FourPointX] Your exif data from your image indicates 33.7 mm focal length. The size of the moon looks to be about 300+ focal length (35mm. equivalent). You could use a rough rule-of-thumb of 10 times whatever your exif data says.

That's probably about as close as you can get. There truly is no number that is exactly correct, because your camera shoots in 4:3 aspect ratio, vs. 1.5:1 for DSLRs. The closest answer is to multiply by the ratio of the diagonal measurement of a 35mm sensor to the diagonal measurement of your sensor.

ETA: this ratio for your camera is 5.6, so multiply the focal length in the EXIF by 5.6 to get the approximate 35mm equivalent.

Message edited by author 2012-01-10 10:21:31.

spiritualspatula

Panasonic LUMIX DMC-LX100

Nikon AF-S NIKKOR 24-70mm f/2.8G ED

01/10/2012 11:00:30 AM · #30

Whelp, I had already brought my camera along with me to work before you said it wasn't necessary, so here's a bunch. All were taken maybe 10 miles east of Fort Collins, with the exception of the wind generator shot, which was taken near Grover, CO. Focal lengths are the photo names. If you check the exif, two of them say 500, but only one of them is and I estimated what the other was based on what the lens said as I shot. Not sure why the exif was wonky...
Again, shot with a 1.5 crop camera.

ETA: Ha- they look sorta cool all laid out side-by-side...

Message edited by author 2012-01-10 11:01:01.

alexlky

01/10/2012 11:13:09 AM · #31

single raw double exposure (2 lens) 28mm and 300mm (42mm & 450mm FF)

DrAchoo

Panasonic Lumix DMC-LX5

Canon EF 24-105mm f/4.0L IS

01/10/2012 11:40:19 AM · #32

Originally posted by spiritualspatula:

Ok, that is awesome! :)

o2bskating

Canon EOS-350D Rebel XT

Canon EF-S 18-55mm f/3.5-5.6

01/10/2012 11:44:28 AM · #33

ooh that is kinda wicked looking like that!

spiritualspatula

Panasonic LUMIX DMC-LX100

Nikon AF-S NIKKOR 24-70mm f/2.8G ED

01/10/2012 11:53:45 AM · #34

BTW, they were taken within the same minute, so ~~actual~~ apparent movement of the moon is negligible.

ETA: Touche Richard, touche!

Message edited by author 2012-01-10 12:16:05.

Canon EF 16-35mm f/2.8L USM

01/10/2012 12:12:54 PM · #35

Originally posted by spiritualspatula:

BTW, they were taken within the same minute, so actual movement of the moon is negligible.

I like your series of moon images. Well done!
Just for fun, the moon will move across the sky at an average speed of 1.022 km/s. Over a minute, the moon will move about 61.32 km. So, the actual movement is negligible, but "significant". LOL!!!!

FourPointX

Canon EOS-60D

Canon EF 50mm f/1.8 II

01/10/2012 01:02:06 PM · #36

Originally posted by FourPointX:

tonight's moonrise uncropped 33mm equiv.

thank you

kirbic and

hahn23

the correct equivalent then would be 192mm

bigskyeye

Canon EOS-5D Mark II

01/11/2012 01:35:26 PM · #37

Where are you going to go? I live in Bozeman Montana and think it is supposed to be pretty close to this area miles. Where is the best area to view?

bigskyeye

Canon EOS-5D Mark II

Canon EF 16-35mm f/2.8L USM

01/11/2012 01:37:48 PM · #38

Oh, I guess not. I thought it was more in the northwest