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by E.J. Peiker on Thu Oct 21, 2021 9:45 am
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Looks like it will hit a sweet spot for many photographers.  Brings a lot of the a1 to a more affordable price point with a still hefty 33mp:


• 33MP Full-Frame Exmor R CMOS Sensor
• Up to 10 fps Shooting, ISO 100-51200
• 4K 60p Video in 10-Bit, S-Cinetone
• 3.68m-Dot EVF with 120 fps Refresh Rate
• 3" 1.03m-Dot Vari-Angle Touchscreen LCD
• 759-Pt. Fast Hybrid AF, Real-time Eye AF
• Focus Breathing Compensation
• 5-Axis SteadyShot Image Stabilization
• Creative Looks and Soft Skin Effect
• 4K 15p UVC/UAC Streaming via USB Type-C

Some interesting innovation here:
"Complementing the a7 IV’s advanced autofocusing is the Focus Map function, which allows you to pre-visualize depth of field and select the correct aperture to keep subjects in the focal plane of your lens. In-focus areas are displayed normally, while objects behind the plane of focus are displayed with a blue tint and objects in front of the plane of focus are displayed with a red tint. Another unique focusing function is Focus Breathing Compensation, which smoothes focus transitions to maintain a consistent field of view and composition when racking focus during recording."

Preorder starts today for $2500...

Decent quick summary on the B&H site:
https://www.bhphotovideo.com/explora/videos/photography/sony-a7-iv-advancing-the-all-around-full-frame-camera

Plus the normal DPReview stuff:
https://www.dpreview.com/videos/5397957206/dpreview-tv-sony-a7-iv-first-impressions-review
https://www.dpreview.com/reviews/sony-a7-iv-initial-review
 

by Karl Egressy on Thu Oct 21, 2021 3:19 pm
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The so called lossy compression worries me. In order to get 10 fps in RAW, you have to use lossy compression, which means you loose quality (detail)
If you switch to uncompressed RAW then the fps rate drops to 5 fps which is unacceptable for BIF.
 

by E.J. Peiker on Thu Oct 21, 2021 6:05 pm
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Karl Egressy wrote:
The so called lossy compression worries me. In order to get 10 fps in RAW, you have to use lossy compression, which means you loose quality (detail)
If you switch to uncompressed RAW then the fps rate drops to 5 fps which is unacceptable for BIF.


The lossy compression is no different than the compressed RAW Sony has always offered before the a1.  In normal shooting it makes absolutely no difference.  The only time it will impact anything is if you are doing something like star trails or astro.  Also somthing like fireworks - basically anytime you have a thin bright line against a very dark background - even then, you will only see it if viewing the file at 100%.  For action photography where you need the high frame rate, it is a complete don't care.
 

by Karl Egressy on Fri Oct 22, 2021 8:36 am
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Thanks for the correction E.J.
 

by norbert on Fri Oct 22, 2021 3:57 pm
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No stacked sensor - so blackout or "stutter" at high frame rate. Kills it for me
 

by Brian E. Small on Sat Oct 23, 2021 11:43 pm
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norbert wrote:
No stacked sensor - so blackout or "stutter" at high frame rate. Kills it for me


E.J. any thoughts on this comment?
 

by E.J. Peiker on Sun Oct 24, 2021 5:21 am
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Brian E. Small wrote:
norbert wrote:
No stacked sensor - so blackout or "stutter" at high frame rate. Kills it for me


E.J. any thoughts on this comment?

It just means that it won't have the zero blackout viewfinder, in other words it will be more like a DSLR when shooting a moving subject.  That's not due to the lack of a stacked sensor though.  a9's have always offered blackout free shooting even before stacked sensors.  What the stacked sensor allows is to have almost no rolling shutter so you can shoot fully electronic shutter even on moving subjects which makes blackout free shooting more viable if something is moving fast. The a7 does have a bit of rolling shutter due to a slower read-out speed which  so you would want to shoot it in electronic first curtain not fully electronic shutter to avoid rolling shutter effects on fast moving subjects which means blackout similar to a DSLR when it's mirror came down in between shots.
 

by Philip Laing on Sun Oct 24, 2021 12:32 pm
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E.J.,
In response to Karl Egressy you pointed out that lossy compression makes no difference in normal shooting.
Does this also apply to the a7RlV (in FX and DX modes) as well as to the a6600?
 

by E.J. Peiker on Tue Oct 26, 2021 8:10 am
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Philip Laing wrote:
E.J.,
In response to Karl Egressy you pointed out that lossy compression makes no difference in normal shooting.
Does this also apply to the a7RlV (in FX and DX modes) as well as to the a6600?


For normal stuff where you aren't really pushing the post processing, yes it won't make an discernible difference but I personally still shoot in uncompressed RAW on that camera as storage is cheap, relatively speaking :)

Just FYI, FX and DX is a Nikon moniker that is just a name they assign to full frame and APS-C - it is not used by any other manufacturer in the industry.  ;)
 

by Philip Laing on Tue Oct 26, 2021 8:17 am
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Thanks for the response E.J. I appreciate it.
 

by SantaFeJoe on Tue Oct 26, 2021 5:11 pm
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From a Sony email today:

Sony Announcement

http://view.email.sel.sony.com/?qs=cb6c84463df04b7d72a6904d4d01b6b57422e2ee8a1468b06bebb943a383793be138feb40f14a82ef254a583e78a10cbd31ca22cf7b9e588b1dd3f393fd9c7ffbf2f066f8c3ffd1348160881e229d761Joe
Learn the rules like a pro, so you can break them like an artist.  -Pablo Picasso
 

by SantaFeJoe on Tue Oct 26, 2021 5:14 pm
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I can’t edit the above due to length on screen, but this is how it should have looked:

Sony Email

Joe
Learn the rules like a pro, so you can break them like an artist.  -Pablo Picasso
 

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