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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 18 May 2014 (Sunday) 10:45
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24 f/2.8 IS for Astrophotography?

 
hiketheplanet
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May 18, 2014 10:45 |  #1

Anyone use this lens for Astrophotography? How is it in the corners, is there too much coma? After buying the 35/2 IS, I gotta say I am most impressed by that line of Canon EF primes in terms of IQ and build quality. Brian Carnathan gave the 24 a pretty good review, but I'd be particularly interested in it's ability to capture Milky Way shots and stuff like that. Anyone with some experience with this lens in those situations?




  
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1Tanker
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May 18, 2014 12:33 |  #2

First ask yourself, if when using the 35/2, can you afford to lose another stop of light?

Granted, you can gain a touch longer shutter speeds with the wider lens, before star-trails start(if using the "600 formula"..17s for 35mm vs. 25s for 24mm; ~2/3 stop gain)..unless using an alt-azimoth or equatorial type mount.


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hiketheplanet
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May 18, 2014 12:45 as a reply to  @ 1Tanker's post |  #3

Thanks for the reply. As awesome as I think the equatorial rigs are, I don't see myself going to those lengths for star shots. Good advice about using the 35 and seeing if that works out for me. I've shot at 24mm & f/2.8 before and it at least meets my expectations of liight gathering ability before trails set in. I guess i'm more asking about edge performance which becomes very noticeable when shooting a sky full of stars




  
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Jerobean
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May 18, 2014 12:48 |  #4

if you want real wide check out the rokinon 14mm. People get absolutely amazing astrophotography shots with it.

if you go the the lens sample page for the lens, there are great examples.

to your exact question, I have never used the 24mm.

https://photography-on-the.net …ead.php?t=90927​2&page=234


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NWPhil
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May 18, 2014 13:21 as a reply to  @ Jerobean's post |  #5

You will gain no advantage with IS for nightscapes - actually, it should be turned off
Second issue, is regarding lens "coma" effect - yes, canon wide angle lenses are known to display stars closer to edges as having a sort tail-like blur, thus the name "coma"
Then you have to consider if you camera can handle long exposures - I am referring to what's call amp noise - it will shown as a purple glow on images, usually coming from right side or bottom.

So, if you have already a wide angle lens, that covers enough sky for your intentions and whishes - btw the Rokinon 14mm is indeed a great option for nightscapes - you better off investing in a sky tracker device (there a couple available), assuming you have already a sturdy tripod - if not, all the above will be won't matter, and your images will end blurred

last but no least, here at POTN there is a great sub-forum to specific advice for this subject and related issues
https://photography-on-the.net/forum/forumdis​play.php?f=136
astronomy and celestial photography


edit:
a nice blog with plenty of info:
http://www.mikesalway.​com.au …gear-and-recommendations/ (external link)


NWPhil
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Photo123abc
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May 18, 2014 14:35 as a reply to  @ NWPhil's post |  #6

I would recommend Samyang 14mm f/2.8, 24mm is just too narrow to capture milkyway in a single shot. Also 14mm gives you longer exposures without startrails. ;)


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MalVeauX
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May 18, 2014 15:43 |  #7

Heya,

If you're wanting this specifically for astro, I would say that instead, take a look at the Samyang 24mm F1.4 manual lens. It has excellent coma handling compared to Canon equivalents. Stop down to F2 for sharpness. Still a very fast lens. Just search for comparison reviews of that lens vs a Canon lens and see the examples. It has excellent edge sharpness and coma handling, which is what astro needs a lot of in wide field astro. The 35 F2 has pretty stark coma by the way.

Very best,


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EverydayGetaway
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May 19, 2014 00:57 |  #8

If astro photography is your primary interest, I would get the Samyang/Rokinon/Bower 24mm f/1.4. It's the same price if not less and it's 2 stops faster. MF shouldn't be an issue for astro. Go check out the shots from member "NCHANT" in the sample gallery, should convince you ;)


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Proper_propaganda
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May 22, 2014 21:38 |  #9

Yup, have some buddies that use the roki 24mm for shooting at night and it's pretty amazing. The milky way looks huge using a 24mm compared to the usual shots with an ultra wide. I still like using something real wide for shooting astro stuff but am considering picking up the 24mm 1.4




  
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24 f/2.8 IS for Astrophotography?
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