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Newbie Question: Opening Files From SD Card


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I recently bought both an A7IV and a 7C. When I open the SD cards from the cameras on my Mac desktop and clicking the MP4 files from the A7IV I get the message; “The file contains some media which isn’t compatible with QuickTime player,“ and if I hit continue it just opens a blank screen. However, with the A7C, I can see the video’s image in the icon on my desktop and it opens right up on my desktop in QuickTime. Same with ARW files. From the A7iv I can’t get them to open in preview, Apple Photo, or Dark Room… But coming from the A7C all works great…I’m sure I’m missing something really simple here. Any help is greatly appreciated. 

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    • Hi Pieter, Not yet. I've thought about that, to use a tripod. But I've no time to try that yet. I'll try it this weekend and let you know.  Thanks!
    • Did you try manually focussing at 135mm, camera on tripod / solid ground, delayed release? If you can get sharp pictures that way, at least you know the optics are fine.
    • I don't know how those cameras would fare as aviation cameras - either of them are far beyond my scope of purchase - but people have been taking pictures of planes and other man-made flying objects well, as long as they have been around.  Unless the aircraft is flying straight at you or flying perpendicularly away from you, the AF lagging behind the shutter should not be an issue and in almost all cases you would be shooting at infinity so internal lens movements to acquire focus should be at a minimum.  If you are expecting to crop a lot, I guess a camera with higher resolution would be better for you but that also depends on what you are going to do with the image.  If you are going to be printing large mural sized prints, higher resolution image would be better but if you are going to print at or below 11x17 or not print at all, even a cropped image from my A7II will be good enough on any consumer grade monitors on the market.  I have seen images printed from the first generation Olympus OM-D E-M5 (16MP) at 11x17 and they were excellent.
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