Sony R7IV File Size, Processing Power, Storage
AuthorTopic: Sony R7IV File Size, Processing Power, Storage Read 6700 Times
Mike Nelson Pedde
ParticipantPosts: 576Sony R7IV File Size, Processing Power, Storageon: September 8, 2019 at 9:43 pm
When I am shooting landscapes, I use focus peaking quite often. This only requires sliding the lens setting from autofocus to manual after I have composed.
Actually, you can set your focus mode to DMF (Direct Manual Focus) and have both autofocus and manual focus/focus peaking w/o having to switch the lens to manual. Simply press the button to focus (I use back button focusing, and reversed the two buttons so that the AEL is for focusing) and it will lock focus for you. I have the C1 button set to zoom, and I can easily reach that with my index finger. Press C1 and move the focus ring on the lens and it will display the focus peaking. It will display focus peaking even if it’s zoomed out, but it’s generally unusable.
One thing I’ve discovered with the A7RIII that I really like is that focus lock enables IBIS in the viewfinder, even with manual lenses. I have a small motor tremor in my hands, but if I press the AEL button and then the C1 button to zoom in, the image stops bouncing around the screen – again, even with manual lenses.
Mike Nelson Pedde
KeymasterPosts: 677Re: Sony R7IV File Size, Processing Power, StorageReply #1 on: September 22, 2019 at 2:13 pm
I spent the day shooting with my a7rIV on Saturday. Doing a lot of tests. I am really like the file quality and did some tough shots. One was a high contrast scene with bright skies. I shot to make sure I had a good histogram. The file looked kind of blah. The sky was blown out and the foreground was dark. After a few adjustments in Capture One, I had a nice image. More info will follow in an upcoming article on this camera. I like what i am seeing so far.
Before . . .
After . . .
CEO & Publisher of PhotoPXL.com and Rockhopperworkshops.comRe: Sony R7IV File Size, Processing Power, StorageReply #2 on: September 22, 2019 at 6:39 pm
Kevin, I used my new Sony A7rM4 for the first time on Wednesday while I was down in Scottsdale, AZ. Butterfly Wonderland was nearby; and the subject matter was a perfect opportunity to test color reproduction and the reported improved focus tracking as well. What I saw through the viewer blew me away, as the color and detail was outstanding. When I downloaded the files, the unedited images still looked good, but admittedly required basic editing to get to what I feel is top notch reproduction. This experience is a little different from the one you described; and there may be two reasons for this.
First, I bet you had your camera set on auto-color balance. If so, this would create potential for the sensor to mis-interpret the correct color balance, since it has to take a weighted average of the reflected light from different parts of the image. This is something that is effectively corrected in post-edit, but not without some work. I set my camera to the same color temperature as the incident light based on the reading I got from my color meter, an accessory that I now regularly use. The second factor may be that current editing softwares don’t yet develop the most accurate standard previews for the Sony A7rM4 because they were unprepared for Sony’s surprise announcement and were rushing to get a RAW editor in place. Not so sure about this possibility, but it is logical.
Regarding the “blown” highlights, it is common, even with the latest cameras, to display a histogram that is somewhat inaccurate. I have noticed a consistent tendency to deliberately err on the underexposure side to avoid over-exposure. For this reason unrecoverable highlights rarely occur. And, yours appear to be just fine and readily fine-tuned in post-edit. In, fact, with 15 stops of dynamic range there is probably a fair amount of leeway for ETTR exposure with this camera, except this can only be reliably determined through actual testing in different light conditions.
The only negative that I encountered in my first outing with the M4 has to do with more noticeable noise in the darker tones when shooting with an ISO higher than 800. I had to use 1600 to give me a high enough shutter speed to reasonably freeze butterfly motion. Complicating this was the fact that I shot with a Sony 135mm f1.8 GM lens for maximum sharpness, but had to use an f11 opening to get a workable depth of field at the short distances I shot with. In most cases, I could tame the noise in Lightroom, and of course do even better with masking in Photoshop. But, I would say that despite Sony claims, the M4 generates more noise at moderately high ISO’s than does the M3. Of course, I have a lot more shooting and teating to do before I have a right to reach hard and fast conclusions. Attached is one of my butterfly images.
You must be logged in to access attached files.Re: Sony R7IV File Size, Processing Power, StorageReply #3 on: September 22, 2019 at 8:47 pm
Correction to my comments:By auto-color balance I was of course referring to “auto white-balance”. Also, I haven’t yet figured out how to insert a full-sized image into the PhotoPXL texts as Kevin does. But, the reader can click on the partial thumbnail to see a pop-up of the full image.
HSRe: Sony R7IV File Size, Processing Power, StorageReply #4 on: September 22, 2019 at 11:27 pm
Kevin, For some reason, I keep thinking about your first shooting experience with your A7rM4. At the risk of being a pest, I think that there may be an even more accurate explanation for the unexpected initial drabness of your farm scene images, even allowing for the extremely flat lighting. I wonder if your “Creative” setting was either on standard or neutral. I think that one of those is the default setting for Sony cameras. My setting was on Landscape, as that gives me a little more punch to start with, and I can more easily tone that down if necessary than I can find the right balance starting from what is usually a very drab image. As you know, a number of camera manufacturers offer a balance that they call “neutral” which has little or no adjustment to the RAW image so that some photographers can initiate editing with minimal pre-determination. The “Standard” setting is a little more punchy, but a lot closer to Neutral than to the Landscape setting. I’ve used them all over the years. But, I find the latter choice a more effective starting point. The landscape setting builds in more vibrancy and contrast, though I find that I often add a little more vibrancy in my editing anyway, depending on subject and lighting. I remember now that when I used the neutral setting, I was often shocked by the way the starting image looked. So, I’m curious, what creative setting did you have on your rM4 during that first shoot? By the way, I tend to use the Landscape setting even on some of my wildlife shots because the outdoor environment is often the same.
OK, I promise to give other subscribers a chance at this one!
KeymasterPosts: 677Re: Sony R7IV File Size, Processing Power, StorageReply #5 on: September 23, 2019 at 12:12 am
Harvey, On a number of my other shots the images look fine. The shot I showed here was a shot to see how ell the file could be handled in a very difficult lighting situation. If I did not make adjustments to the exposure the sky would have blown out and the foreground would have looked fine. I shot various exposures of this one scene and worked it for a balanced histogram. This means there was no clipping on either end. This scene encompassed the whole luminosity range from 0-255 without clipping. Essentially a peak on the left and right and a valley in between. The purpose was to see if I could hold detail in shadow and highlight without losing anything. I used Capture One which is tuned for the a7riv. Phase One works with Sony closely and is one of the first at the time to handle RAW a7riv files.
Typically a shot like this could be handled by doing an HDR image. I wanted to see if I could make the image work without HDR using luminosity masking in C1. It appears darker in the post as I believe I lost a bit of brightness converting from ProPhoto to SRGB. I’ll go back and check the setting for WB. Pretty sure everything was set at neutral and standard.
Other images with light behind me and or without such a wide range of lights and darks are just fine. I did a number of other images I’ll share on my final report. I did a portrait type of image in the mill which has no issues. and show good exposure and details.
I’ll show a more refined image below along with the original histogram. You can see there are no mid-tones when I pull the exposure back to hold the sky. Once again the challenge was to see if shadow and highlights could be saved without having to do HDR.
Also, to make up for any issues in color etc. these images will be available as a download in the report. RAW files too so readers can have their own fun with them.
The image below I’ll include in my report. Detail etc are fine on this.
CEO & Publisher of PhotoPXL.com and Rockhopperworkshops.com
- You must be logged in to reply to this topic.