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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 11 Jun 2010 (Friday) 11:17
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I need some help looking for a lens

 
luigis
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Jun 11, 2010 11:17 |  #1

Hi Guys,

I like taking astrophotography pics. To avoid star trails I'm limited in exposure time so I use the lens wide open to max the exposure. I'm currently using a Canon 28mm F2.8 at F2.8 on my 5DII. My question is: Which lens has the best relationship in price / sharpness wide open ? I'm open to all manufacturers and manual focusing lenses are fine, even with adaptors for Canon EOS.

Thanks for any recommendations you can give me!

Luigi


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luigis
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Jun 11, 2010 14:32 |  #2

I guess I need to reformulate the question into something more interesting such as "what is the best WA prime wide open?"


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Mac5
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Jun 11, 2010 16:04 |  #3

Hi Luigi,

Here is a great website that has several lens recomendations for astrophotography. I hope this helps. The arrows at the bottom will navigate you to the page on camera lenses. www.astropix.com (external link)

Mac5




  
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Mac5
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Jun 11, 2010 16:06 |  #4

Sorry it's under the section labelled astrophotography techniques.

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luigis
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Jun 12, 2010 12:19 |  #5

Ty Mac5!


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xarqi
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Jun 12, 2010 16:37 |  #6

Would you not be better off obtaining a tracking mount of some type?




  
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luigis
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Jun 12, 2010 16:53 |  #7

xarqi wrote in post #10350127 (external link)
Would you not be better off obtaining a tracking mount of some type?

Actually you don't need a tracking mount. You can take several shorter exposures and add them together by software. I move the camera using a Manfrotto 410 geared head manually, then align the images with ptassembler and stack them together.

This is fine for astropics but not quite good for night landscapes where you have rocks, water, trees. The reason is that those elements are static while the stars move so you can't align the shots together, tracking woudln't work for the same reason.

The only simple solution is to take the larger exposure you can with the lens wide open.


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I need some help looking for a lens
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