My first test of pushing exposure - ISO invariance. A7iii shot at ISO 400 and
-3EV, hand held, stack of 5 images using Helicon focus, evening light. Post
process that with +4EV exposure compensation and a little Topaz AI sharpen. Two
other shots at ISO 800 +1EV on previous evening.
https://photos.app.goo.gl/gb8icgGTNGkM5BV9A
Maybe not a good comparison as it could have been darker the 2nd night. Again,
for ISO invariance, if you have the dynamic range at higher ISO, seems that may
be a better option.
I would be curious to see the results if anyone else tries this technique.
At 10/13/2019 12:45 PM, Moose wrote:
><...>
>
>{FF-rant: Comparing a dynamic range of FF sensor to u43, for example, a7r3 (or
>a73) is 11.64 at ISO 100 compared to GX9 is 9.75 at ISO 100, almost 2 stops.}
>
>----------------------------------
>Anti FF-rant:
>
>Most subjects don't require that much DR.
>
>A camera with infinite DR that can't take the photo I want to take is useless.
>
>FF cameras and their lenses are heavy enough that I simply can't use them in
>the field
>
>With µ4/3, I can have an 800 mm eq, hand holdable lens. That doesn't exist
>for FF.
>
>I use a FL range of 14-800 mm eq. (Horiz. AoV of ~150° to 2.5°) and often
>switch FL a great deal from one shot to the next.
>
>A fair amount of what I shoot moves, so it's zoom or miss the shot.
>
>Using FF for my kind of field photography would be like using an 8x10 view
>camera for flutterby photography.
>----------------------------
>
>I DO have a FF A7 for other sorts of photography, but would no more use it for
>my general photography than I'd use a howitzer for hunting cheetahs.
>
>Moose D'Opinion
You have good points and I am still looking for the right smaller camera. Here
in the desert I find the dynamic range useful.
Since I have Sonnie now, an APS-C Sonnie seems the best option for me, but the
GX9 is also enticing. A lot comes down to lenses. I had, before giving to grand
daughter, a6000 with 18-135. An APS-C lens on a7riii will crop to APS-C and be
almost as small an outfit. On the a7riii would be 18mp and still have the
higher PDR of that sensor.
So I do like my howitzer. I was out on my mountain bike with A7Riii and 24-105
today. It was a bit bulky, heavy in the camelback, but less so than the 3L of
water I carried/consumed. Some shots for the day...
https://photos.app.goo.gl/XT5dq7R5Fonj62nc9
I never new what the inside of a Saguaro looked like until I moved to AZ. I
used to think the cowboy in the desert could hack into a cactus for water. Now
I know that is a myth.
WayneS
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|