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moon shot with ef600 f4II

Started Oct 12, 2013 | User reviews thread
numnuts
numnuts Forum Member • Posts: 99
Re: moon shot with ef600 f4II
1

I think Iron Mike might be on track with a lot of the image degradation. While I don't own the 600, but have the 400 2.8 I've found that absolute image quality is attained one or two stops from wide open with these lenses, so f4-5.6 for me, f5.6-8 for you, but throw on the 1.4 tele converter and you'll need to go another stop again to maintain the lenses native aperture, so reporting f8-11. Also maintaining aperture is a given for comparing image quality. I noticed also that the shutter speed was pretty high. Unless you're shooting hand held you'd be better off reducing shutter speed for lowest iso. I've shot the moon on my 7D surprisingly clean at 1/50th (I found this to be about as slow as I could go before getting motion blur) while using both a 2xII and a 1.4xIII behind my 400 at a true f11, one stop from wide open. A day or two later I tried the same setup and settings on my 5DII, but the quality wasn't as good, so apparently clear nights do vary a lot as others have said.

The shot below is the one from my 7D, straight from raw conversion so it'll clean up a bit better than this. Also you can see the exif doesn't report double stacking of tele's, hence the info saying 800mm f8.

 numnuts's gear list:numnuts's gear list
Canon EOS 7D Mark II Canon EOS 5DS Canon EF-S 10-22mm F3.5-4.5 USM Canon TS-E 17mm f/4L Canon EF 70-200mm F2.8L IS II USM +7 more
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