ben egbert Offline Upload & Sell: Off
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Snapsy did a test on the effect of EFCS on subsequent shots and shows the second shot does not get the advantage of reduced camera shake. https://www.fredmiranda.com/forum/topic/1374160
But this is for long lenses. I do HDR brackets mostly with UWA, where subject motion trumps camera shake and where camera shake is not much of a problem on a good tripod. I use a RRS tripod and ball head and a cable release.
But one thing that is good for any focal length is that the first shot gets the EFCS advantage so it makes sense to make the bracket sequence +.0,- The longest shot goes first when EFCS is effective.
In my own test at 11mm I varied from single shots to s burst (silent) to H burst. s Burst is 3 frames per second and h Burst is 5 frames per second. All in live view mode 1. I do not see any shake in either mode at 11mm. I think this works pretty good up to 50mm or so. I have seen shake with my 70-200 when mounted to the lens bracket someplace above 150mm.
Some stuff I learned. If you shoot singles for a blend like HDR, you get terrible subject motion, leaves and clouds do not align and will ghost like crazy. This is solved in mild wind with either the h or s burst mode. Clouds are especially bad.
If you want to get a burst, it is best to AF first and then turn off the AF before shooting, otherwise it tries to focus each time, and UWA lenses do not focus fast. Of course MF would not matter.
I have experimented, and cannot beat live view AF with normal AF or manual focus. If you look at the distance dial on the lens and watch where it ends up after each focus, you will see live view repeats each time, but regular AF or MF will not.
11-24 soft edges:
I have seen very sharp foreground and very sharp infinity with out of focus edges. I started seeing this with my 17TSE back on the 1DS3. But it has become very noticeable with the 11-24 5DS-R. I even saw this with a Ziess 15 f2.8 that I briefly owned when mounted on a 1DS3.
For my 11-24, focusing on an edge about 1/3 to 1/2 up the side at f11 produces best results and seems to solve the soft edge problem I have seen. I use Live view focus with x6 mag, then turn AF off.
This may be a field curvature issue, but it could also simply mean that the left and right edges are further away from the sweet circle of sharpness and need to be more critically focused. The very large DOF for an UWA lens allows sloppy focus to work on the rest of the image.
I also see some cases of fringing on the 11-24 even after Adobes automatic lens correction has been applied. This is in strong light situations. The 17TSE is the better lens in this regard.
I have even seen the soft edge issue with my 24-70 f2.8 mk2 at 50mm. I wonder if the light angle at the extremes entering very tiny photo sites is a problem?
I am finding that ISO50 greatly reduces sky noise for HDR processing. It is still there before NR, but greatly reduced from ISO100 shots. I have heard that ISO50 has less DR than ISO100, but that would not matter for a blended shot.
I have found the 5DS-R files can be pushed pretty far, and I am not seeing the banding I saw in earlier cameras. But I get cleaner results when I blend images that don’t need to be pushed. IE, each area is from an image that
is exposed for that lighting.
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